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Honeywell Precision Pressure Transducer 2 User Manual
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Honeywell Precision Pressure Transducer 2 User Manual

Honeywell Precision Pressure Transducer 2 User Manual

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Honeywell Precision Pressure Transducer 2
PPT2 User's Manual

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Summary of Contents for Honeywell Precision Pressure Transducer 2

  • Page 1 Honeywell Precision Pressure Transducer 2 PPT2 User’s Manual...
  • Page 2 Honeywell reserves the right to make changes to any products or technology herein to improve reliability, function or design. Honeywell does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.

  • Page 3: Table Of Contents

    ADS-14221, PPT2 User Manual October, 2016 Table of Contents Table of Contents ....................3 1.0 Product Overview ..................4 2.0 Getting Started ....................5 3.0 PPT2 Command Summary ................9 4.0 Terminology ....................17 5.0 Command Descriptions (alphabetical order) ..........21 6.0 Electrical Connections ................

  • Page 4: Product Overview

    October, 2016 1.0 Product Overview The Honeywell Model PPT2 Precision Pressure Transducers provide high accuracy pressure readings in both digital and analog form. The first-time user will be able to use the PPT2 within minutes, yet capability exists to configure the PPT2 to optimize performance in the User’s specific applications. Throughout this User’s Manual, the PPT2 may be referred to as Precision Pressure Transducer.

  • Page 5: Getting Started

    ADS-14221, PPT2 User Manual October, 2016 2.0 Getting Started OVERVIEW The first-time user should approach the PPT2 in a manner analogous to using a word processor program; i.e., many features are available but one may begin by using only those of interest at the moment. As shipped from the factory, the default settings provide a pressure transducer that will be usable for many applications.

  • Page 6: Initial Turn-On Response

    ADS-14221, PPT2 User Manual October, 2016 INITIAL TURN-ON RESPONSE Analog Output The factory default analog output will provide a voltage (range 0-5V) which, when ambient pressure is applied to the PPT2,reads: Voltage Output Pressure Type (@ zero applied pressure) Gauge units 0 volt Differential units 2.5 volts...
  • Page 7 ADS-14221, PPT2 User Manual October, 2016 STEP-BY-STEP EXAMPLES (For a single PPT2 connection, default 00 address) READ A SINGLE PRESSURE Once the PPT2 is powered up and connected to a computer, enter the following command: (do not type “<cr>”, press the ENTER/RETURN key) User Types on the keyboard: *00P1 <cr>...
  • Page 8 ADS-14221, PPT2 User Manual October, 2016 READ CONTINUOUS PRESSURE For continuous pressure readings (factory default rate = 5 per second) enter the following command: *01P2<cr> This enables a continuous stream of compensated pressure readings to flow into the terminal program. $*99IN<cr>...

  • Page 9: Ppt2 Command Summary

    ADS-14221, PPT2 User Manual October, 2016 3.0 PPT2 Command Summary The PPT2 command set is summarized in Table 1.0 – Command List. A more detailed description of each command can be found in the subsequent command descriptions in Section 5. Table heading explanations for Table 1.0 –...
  • Page 10 ADS-14221, PPT2 User Manual October, 2016 Write to EEPROM: Can this command have parameters stored in EEPROM? Yes – Parameter values associated with this command may be stored in EEPROM. No – Cannot store anything from this command in EEPROM. All –...
  • Page 11 ADS-14221, PPT2 User Manual October, 2016 Table 1.0 – Command List, Grouped by Function See previous page for descriptions of the table headings. Action Sequence of Requires Terminates Can Write Command Directing Response with Input or Write Continuous Can Write Command Description Code Command...
  • Page 12 ADS-14221, PPT2 User Manual October, 2016 After (4) Both Lowest Analog Voltage (11) After (4) Both Offset Pressure Window (analog (11) output) After (4) Both Width of Analog Window (11) After (4) Both Send Number to DAC (force analog (11) output) Diagnostic and Reset Control After...
  • Page 13 ADS-14221, PPT2 User Manual October, 2016 COMMAND LIST NOTES The C= and D= commands do not change the mode of operation but do provide a user supplied power-up message if configured using the MO command. The IN command does not change the operating parameters stored in RAM, but it does stop continuous readings (P2, P4, T2 commands).

  • Page 14: Command Format

    ADS-14221, PPT2 User Manual October, 2016 COMMAND FORMAT Communication between the host or control processor and a PPT2 is accomplished by message transfers, or commands and replies. Communications initiated by the host processor to one or more PPT2s are called commands and must begin with an ‘*’...

  • Page 15: Pressure Reading Decimal Position

    ADS-14221, PPT2 User Manual October, 2016 PRESSURE READING DECIMAL POSITION The table below shows the number of decimal place variations with respect to PPT2 full scale - the number of digits to the right and left of the decimal place. This is valuable when converting a binary format number so that the proper decimal position can be determined.
  • Page 16 ADS-14221, PPT2 User Manual October, 2016 PPT Commands/Parameters Not Implemented in PPT2 DA={O|S|T|U} Digital and Analog Control DO=N|P Noise Protection in P4 mode NE=ZER[O,V] NE Command Extension Reading Rate Speed Shift x2 Speed Shift at 50msec Intervals Synchronize Integration Cycles Temperature, Single, °F Temperature, Continuous, °F TO=R|M...

  • Page 17: Terminology

    ADS-14221, PPT2 User Manual October, 2016 4.0 Terminology Raw Pressure and Temperature “Samples” Corrected Pressure and Temperature “Values” or Averaged Corrected Pressure and Temperature “Values” Pressure and Temperature “Readings” or Pressure and Temperature “Output” PPT2 Power simplified block diagram Input Regulation Micro- RS-232 or...
  • Page 18 ADS-14221, PPT2 User Manual October, 2016 deadband limits. This controls the OP command mode’s sensitivity to pressure change when the ‘output only when pressure changes’ (OP=U) option is selected. PPT2 ADDRESSING The PPT2 provides three levels of addressing. The lowest level of address is the individual unit address, or device ID.
  • Page 19 ADS-14221, PPT2 User Manual October, 2016 RS-232 Ring Network The RS-232 network consists of a three-wire bus (TD, RD, and GD) that begins and ends at the host processor. In general, the RS-232 electrical standard requires that the distance between units not exceed 60 feet (18 meters).
  • Page 20 ADS-14221, PPT2 User Manual October, 2016 RS-485 Multi-drop Network The RS-485 network consists of a two-wire bus (A and B) that begins at the host processor and ends at the far end from the processor. A star network configuration can also be used where each unit is connected directly to the A and B terminals at the host processor.

  • Page 21: Command Descriptions (Alphabetical Order)

    ADS-14221, PPT2 User Manual October, 2016 5.0 Command Descriptions (alphabetical order) COMMAND CODE COMMAND DESCRIPTION Data String A Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address After (4)
  • Page 22 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Analog Range Setting Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address Before Both Yes (6) Yes (9) DETAILS:...
  • Page 23 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Data String B Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address After (4) Both Yes (9) DETAILS:...
  • Page 24 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Baud Rate and Parity Setting Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address After (4) Yes (9) DETAILS:...
  • Page 25 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Data String C Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address No (1) After (4) Both Yes (9)
  • Page 26 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Check Memory Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address After (4) DETAILS: The ChecK Memory command performs a checksum calculation on both the characterization area and the configuration area of memory.
  • Page 27 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Compatibility Mode Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address Before Both Yes (6) Yes (9) DETAILS: The CM command directs the PPT2 pressure reading length to be compatible with the previous PPT.
  • Page 28 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Data String D Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address No (1) After (4) Both Yes (9)
  • Page 29 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Digital and Analog Control Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address Before Both Yes (6) No (12)
  • Page 30 ADS-14221, PPT2 User Manual October, 2016 DIFFERENCES FROM LEGACY PPT: Parameters O, S, T and U were available for the PPT but have been removed for the PPT2. A new parameter, V, has been added to provide a disabled DAC state. When selecting DA=V, all the analog output circuitry will be put into a shut-down mode.
  • Page 31 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Default Operating Parameters Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address Before Both Yes (6) Yes (9) DETAILS:...
  • Page 32 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Dead Band and Sensitivity Control Action Sequential Input or Requires Terminates Can Write Can Write to DAC Directing Response Output Write Continuous with (90- Type Enable Commands EEPROM address Before Both Yes (6) Yes (9)
  • Page 33 ADS-14221, PPT2 User Manual October, 2016 1-60 provides deadband x 0.005% of full scale deadband limits Note: The full scale for a 20 psig and a 20 psia is 20 psi, but for a 20 psid it is 40 psi (-20 to +20 psi) Note: deadband values of 1-9 must be requested without a leading zero.

  • Page 34: Command Code

    ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Display Units Control Action Sequential Input Requires Terminates Directing Response Write Continuous Write to Write with (90- Output Enable Commands EEPROM Type address Before Both Yes (6) Yes (9) DETAILS: Set the Display Units for compensated pressure replies.
  • Page 35 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION DAC Slope Compensation Control Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address After (4) Both Yes (6) Yes (9)
  • Page 36 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION DAC Offset Compensation Control Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address After (4) Both Yes (6) Yes (9)
  • Page 37 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Customized Full Scale Range Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address After (4) Both Yes (6) Yes (9)
  • Page 38 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Factory Defaults Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address DETAILS: Each PPT2 is supplied with a copy of its factory default settings stored in static memory. The Factory Defaults command causes these default settings, with the exception of baud rate, parity, and ID, to be copied from static memory into the working RAM of the PPT2 microprocessor.
  • Page 39 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Highest Analog Voltage Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address After (4) Both Yes (6) Yes (9)
  • Page 40 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Integration Time Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address After (4) Both Yes (6) Yes (9) DETAILS:...
  • Page 41 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Idle Count Parameter Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address Before Both Yes (6) Yes (9) DETAILS:...
  • Page 42 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Identification Number Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address Before Both Yes (6) Yes (9) DETAILS: Set the device IDentification number.
  • Page 43 ADS-14221, PPT2 User Manual October, 2016 must be addressed sequentially starting with address 01. See the TO command description for further information on RS-485 global addressing. If group addressing is to be used for PPT2 responses, then all PPT2's within a single group must have a group sub-addresses assigned sequentially starting with address 01.
  • Page 44 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Initialize PPT2 Microprocessor Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address No (2) DETAILS: This command INitializes the PPT2 microprocessor.
  • Page 45 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Lowest Analog Output Voltage Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address After (4) Both Yes (6) Yes (9)
  • Page 46 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Maximum Customized Full Scale Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address After (4) DETAILS: This command identifies the Maximum full scale pressure, in psi units, that can be user-customized (see F= command).
  • Page 47 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Power-Up Mode Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address Before Both Yes (6) Yes (9) DETAILS: Sets the power-up MOde for the PPT2.
  • Page 48 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Send Number to DAC Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address No (3) After (4) Both No (7)
  • Page 49 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Analog Output Enable Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address Yes (9) DETAILS: The aNalog Enable command allows the host processor to control the DAC analog output.
  • Page 50 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Offset Pressure Window Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address After (4) Both Yes (6) Yes (9)
  • Page 51 If the IC command is set to any value other than IC=0, then the OP=W command will not set and cause a RS command error condition. Descriptions below for OP=N|C and OP=E|F|R|S assume CM=OFF. With CM=ON, P1-P4 pressure readings have resolution compatible with the Honeywell PPT2pressure transducer. See the CM command for more information. EXAMPLES:...
  • Page 52 ADS-14221, PPT2 User Manual October, 2016 MO settings, and a flag will be set in the RS command response..........................“Idle” mode (default) when I ≥ M20 and IC>0. PPT2 electronics enter a lower power mode during the idle time between integrations. Power savings of 10-20 percent can be expected.
  • Page 53 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Production Date Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address After (4) DETAILS: The Production date command reads the factory set PPT2 manufactured date with format mm/dd/yy.
  • Page 54 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Pressure, Single, ASCII Format Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address Before (5) DETAILS: The P1 command requests a temperature compensated pressure (CP) reading in ASCII format.
  • Page 55 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Pressure, Continuous, ASCII Format Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address No (3) After Yes (8) DETAILS:...
  • Page 56 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Pressure, Single, Binary Format Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address Before (5) DETAILS: The P3 command produces a single binary encoded temperature compensated pressure reading: [With CM=OFF] 7 byte binary format;...
  • Page 57 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Pressure, Continuous Binary Format Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address No (3) After Yes (8) DETAILS:...
  • Page 58 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Read Status Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address Before (5) DETAILS: The Read Status command is used to determine if an error, or warning, condition has been detected by the PPT2.
  • Page 59 ADS-14221, PPT2 User Manual October, 2016 A pressure-over-range error condition will occur when the applied pressure is greater than or equal to 1% of full scale (FS) above the FS limit. For example, if the pressure applied to a 20 psi unit is ≥20.200 psi, then an over range error condition is set.
  • Page 60 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Serial Number Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address After (4) DETAILS: The Serial number command reads the factory set PPT2 serial number.
  • Page 61 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Store Parameters in EEPROM Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address DETAILS: The Store Parameters command causes all control parameter(s) to be stored in the static memory (EEPROM) so they are available after power is cycled.
  • Page 62 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Set Tare Value (gauge units only) Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address After (4) Both...
  • Page 63 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Sensor Temperature, Single, °C Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address Before (5) DETAILS: The T1 command requests a single temperature reading in degrees Celsius.
  • Page 64 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Sensor Temperature, Continuous, °C Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address No (3) After Yes (8) DETAILS:...
  • Page 65 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Tare Control Switch Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address Before Both Yes (6) Yes (9 DETAILS:...
  • Page 66 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Transceiver Operating Parameters Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address Before Both Yes (6) Yes (9) DETAILS:...
  • Page 67 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION User Supplied Display Units Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address After (4) Both Yes (6) Yes (9)
  • Page 68 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Version Number Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address After (4) DETAILS: The Version number command transmits the factory-set software version number.
  • Page 69 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Width of Pressure Window Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address After (4) Both Yes (6) Yes (9)
  • Page 70 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Write Enable to EEPROM or RAM Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address DETAILS: The Write Enable command enables a static memory write or a RAM write operation.
  • Page 71 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Slope 1 – User Compensation Control Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address After (4) Both...
  • Page 72 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Slope 2 – User Compensation Control Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address After (4) Both...
  • Page 73 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Offset – User Compensation Control Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address After (4) Both Yes (6)
  • Page 74 ADS-14221, PPT2 User Manual October, 2016 COMMAND CODE COMMAND DESCRIPTION Suspend Continuous Readings Action Sequential Input or Requires Terminates Can Write to Can Write to DAC Directing Response Output Type Write Enable Continuous EEPROM with (90-99) Commands address DETAILS: This is not actually a command but a special command header character. During a continuous pressure reading command, P2 or P4 in RS-232 ring configuration a ‘$’...

  • Page 75: Electrical Connections

    ADS-14221, PPT2 User Manual October, 2016 6.0 Electrical Connections Name RS-232 (TD) or RS-485 (B) RS-232 (RD) or RS-485 (A) Case Ground Common Ground DC Power Input Analog Output The generic P/N for PPT2 mating connector is “MS3116F10-6S” Examples: Amphenol P/N PT06A10-6S, Newark Stock no. 93F9344 Amphenol P/N PT06A10-6S (005), Newark Stock no.
  • Page 76 ADS-14221, PPT2 User Manual October, 2016 PPT2 RS-485 (A) RS-485 (A) RS-485 (B) RS-485 (B) shield gnd. Host Computer ** Case Ground Power and Signal Common 6 to 34 V DC Power In Common 0 to 5 VDC Out Voltage Output ** For RS-485, host computers may require a USB-to-RS485 or similar adapter.

  • Page 77: Installation Recommendations, Cautions And Materials Of Construction

    PPT2 to a plate, the recommended mounting hole pattern is shown below (upright orientation): To install the PPT2 into legacy PPT applications, please consult Honeywell Application Note AN106, “Mechanically Mounting the PPT2 in Legacy PPT Applications”, found at: www.pressuresensing.com.

  • Page 78: Materials Of Construction

    ADS-14221, PPT2 User Manual October, 2016 7.2 CAUTIONS 1. The PPT2 is an ESD (electrostatic discharge) sensitive device. Damage may occur when subjected to high energy ESD. Proper ESD precautions should be taken to avoid performance degradation or loss of functionality. 2.

  • Page 79: Firmware Errata

    ADS-14221, PPT2 User Manual October, 2016 8.0 Firmware Errata Known issues with current PPT2 firmware revision 4.45SxV As compared with the legacy PPT, absolute pressure PPT2’s configured with OP=R (remove header characters), will insert an extra leading space character (0x20) in the P1/P2 response. This issue is not present on gauge or differential pressure PPT2’s.

  • Page 80: Appendix A: Ppt2 Binary Command Format For P3 And P4

    ADS-14221, PPT2 User Manual October, 2016 Appendix A: PPT2 Binary Command Format for P3 and P4 Commands: For CM=ON (compatible with existing PPT)  Binary format reply consists of 1 byte header character, 4 characters of encoded data, 1 byte optional cyclic checksum, 1 byte <cr>...
  • Page 81 ADS-14221, PPT2 User Manual October, 2016 Using the least significant (LS) 6 bits of each of the 4 data bytes, regroup the binary numbers into the 7 bit binary device address and 17 bit binary pressure data, which produces the 24 bit string: 000000 100011 110001 110110 = @#16 least significant 6 bits of each byte 0000001 00011110001110110 = (device ID=01) and (pressure = 15478)
  • Page 82 ADS-14221, PPT2 User Manual October, 2016 0000001 00001110001110110110000 = (device ID=01) and (pressure = 466352) The binary format reply indicates the device address is ID=01 and the pressure reading is 466352. Now, the decimal point position for the pressure reading must be determined. The decimal place is in the same position as when it reads a P1 pressure command, (see page 14 for decimal position information.) So, if this is a 100 psig device reading in meters of water column (DU=MWC) then there are 4 digits to the right of the decimal place (with CM=OFF).

  • Page 83: Appendix B: Ascii Table

    ADS-14221, PPT2 User Manual October, 2016 Appendix B: ASCII Table HEX ASCII HEX ASCII DEC HEX ASCII DEC HEX ASCII ctrl @ ctrl A ctrl B " ctrl C ctrl D ctrl E ctrl F & ctrl G ctrl H ctrl I ctrl J ctrl K...

  • Page 84: Appendix C: Setting An Analog Pressure Set Point

    ADS-14221, PPT2 User Manual October, 2016 Appendix C: Setting an Analog Pressure Set Point Another feature of the PPT2 is the ability to program an analog pressure set point that triggers the analog output from the low voltage setting (L=) to the high voltage setting (H=) using the W= and O= commands. These outputs can be used to activate alarms or lights based on pressure conditions.

  • Page 85: Appendix D: Ram Initialization

    ADS-14221, PPT2 User Manual October, 2016 Appendix D: RAM Initialization 85 of 85...

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