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Celerity ACX3200 Series User Manual

Adaptive pressure controllers
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ACX3200/ACX3400 Series
Adaptive Pressure Controllers
User Guide
Celerity, Inc.
915 Enterprise Boulevard
Allen, TX 75013 USA
T +1 972 359 4000
F +1 972 359 4100
SD536577 REV 001 08/07

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  • Page 1 ACX3200/ACX3400 Series Adaptive Pressure Controllers User Guide Celerity, Inc. 915 Enterprise Boulevard Allen, TX 75013 USA T +1 972 359 4000 F +1 972 359 4100 SD536577 REV 001 08/07...

  • Page 2: Table Of Contents

    _CONTENTS SAFETY NOTICES _0.1 SAFETY SYMBOLS _0.2 GROUNDING _0.3 EXPLOSIVE ATMOSPHERE _0.4 PART SUBSTITUTIONS AND MODIFICATIONS _0.5 GENERAL SAFETY GUIDELINES _0.5.1 Unsafe Acts _0.5.2 Recommended practices _1.0 INTRODUCTION _2.0 DESCRIPTION _2.1 SYSTEM OVERVIEW _2.2 ACX FEATURES _2.3 CONTROLLING THE SYSTEM PRESSURE _2.4 ADAPTIVE PRESSURE CONTROL _2.5 PID PRESSURE CONTROL _2.6 PID TUNING...
  • Page 3 _4.10.2 Device Port _4.10.3 CM1 and CM2 Interfacing _4.10.4 Throttle Valve _4.10.5 Auxiliary Port _4.10.6 Serial Interface Port _5.0 LOCAL OPERATION _5.1 ACX3400 FRONT PANEL KEYPAD OPERATION _5.2 ACX3400 FRONT PANEL MENU FUNCTIONS _5.2.1 Setpoints _5.2.2 PID Gain _5.2.3 PID Phase _5.2.4 Trip Point 1 _5.2.5 Trip Point 2 _5.2.6 Sensor Range...
  • Page 4 _7.11 SET NUMBER OF CMS _7.12 SET CM FULL SCALE _7.13 CM SELECT _7.14 ECHO SOFTWARE SWITCH _7.15 HARDWARE HANDSHAKING _7.16 INITIALIZE ACX _7.17 LOCK TO HIGH SENSOR _7.18 LOCK TO LOW SENSOR _7.19 RELEASE SENSOR LOCK _7.20 SETPOINT COMMAND _7.21 CONTROL TO SETPOINT _7.22 SET GAIN _7.23 SET GAIN COMPENSATION FACTOR...
  • Page 5 _9.11 REPORT PHASE COMPENSATION FACTOR _9.12 REPORT PRIMARY RAMP SETPOINT _9.13 REPORT PRIMARY SETPOINT DELAY TIME _9.14 REPORT RAMP FUNCTION STATUS _9.15 REPORT SECONDARY RAMP SETPOINT _9.16 REPORT SECONDARY SETPOINT DELTA TIME _9.17 REPORT SECONDARY SETPOINT RAMP TIME _9.18 REPORT SETPOINT _9.19 REPORT SOFTWARE ID _9.20 REPORT SYSTEM PRESSURE _9.21 REPORT TRIP POINT...
  • Page 6 _11.4.2 Analog Setpoint/Valve Angle Input _11.4.3 Pressure Signal Output _11.4.4 Valve Angle Signal Output _12.0 MAINTENANCE AND TROUBLESHOOTING _12.1 CLEANING AND ROUTINE MAINTENANCE _12.2 TROUBLESHOOTING GUIDE _12.3 ACX3400 ERROR MESSAGES _13.0 ASCII CHARACTER CODES _14.0 SERIAL PORT ADAPTORS _15.0 WARRANTY...

  • Page 7: 0.0 Safety Notices

    Use of these instruments in a manner other than those specified by Celerity may result in injury or death and will void the product’s war- ranty. Celerity assumes no liability for any damage resulting from the improper AXC3200 use of its products.

  • Page 8: 0.5.1 Unsafe Acts

    0.5.1 Unsafe Acts • NEVER defeat a safety interlock unless you are certified to perform the proce- dure and have been specifically directed to defeat the interlock. • NEVER operate or service this system without a thorough knowledge of the dangers involved and the precautions to be followed for safe and efficient operation.

  • Page 9: 1.0 Introduction

    _INTRODUCTION 1.0 INTRODUCTION This manual provides the necessary information to configure, install and operate ACX Downstream Pressure Controllers. These include: Communication Model RS-232 RS-485 Additional Features √ ACX3201 auxiliary port √ AC powered ACX3211 √ ACX3401 auxiliary port front panel √...

  • Page 10: 2.0 Description

    The ACX3200 Series includes a contact closure and analog input/output signal interface and a full-featured communications port. The ACX3400 Series provides the same features as the ACX3200 Series and includes a front-panel keypad and display for full system control and monitoring.

  • Page 11: 2.3 Controlling The System Pressure

    2.4 Adaptive Pressure Control Adaptive pressure control technology was pioneered by Vacuum General (Patent now with Celerity, Inc.) in the mid-1980’s when a patent was granted for the algorithm in the AC-2 Adaptive Pressure Controller. Since that time, adaptive control technology has been further developed and refined to the point where the ACX is capable of significant performance improvements over the original design.

  • Page 12: 2.5 Pid Pressure Control

    _DESCRIPTION flow input, pressure set points, etc. can be varied during a process run and the ACX will instantly adapt to provide optimal control performance. The adaptive algorithm is available using the serial and auxiliary port interfaces. In serial mode it is selected by using the “Control to Setpoint using Adaptive” algorithm command.

  • Page 13: 2.7 Hybrid Algorithm

    _DESCRIPTION 2.7 Hybrid Algorithm To increase the range of pressure control using a PID type algorithm, the Hybrid Algorithm may be used over a wider range of pressure setpoint and flow rates. PID is typically set for a specific pressure setpoint and flow rate. With the Hybrid Algorithm, an interactive test to select the highest gain and adequate phase for the highest and lowest pressure and flow is needed.
  • Page 14 All of Celerity’s CMs Compatible Sensors All other sensors with 0-10 VDC linear output and ±15 VDC input requirements Compatible valves All of Celerity’s MDV and MDVX ACX3200 - 3.4 lb [1.55 kg] ACX3400 - Weight 4.4 lb [2.0 kg] Altitude...

  • Page 15: 3.0 Installation

    _INSTALLATION 3.0 INSTALLATION CAUTION When mounting the ACX3200 and ACX3400 series, be sure 3.1 MOUNTING - ACX3200 and ACX3400. to provide clearance around the unit for free circulation of Four mounting holes through the front panel provide all necessary mounting air.

  • Page 16: 4.0 Configuration

    _CONFIGURATION 4.0 CONFIGURATION 4.1 RS-232 Interface The RS-232 port, used on all ACXxx01 models, is the primary interface for con- trolling the ACX. This port may be configured to accommodate a variety of sys- tems. DIP switch S1 (Figure 3) sets the baud rate, stop bits, and parity for the ACX. The factory settings are baud rate of 9600, 1 stop bit, and no parity (see Figure 4:, Typical DIP Switch S1 Positions, RS-232).
  • Page 17 _CONFIGURATION ready to receive data from the HOST. When the output signal is active (low CAUTION state) the ACX can no longer accept data from the HOST. The HOST should DO NOT connect pins 7 and 8 together. This could cause stop transmitting data at once.

  • Page 18: 4.3 Hardware Handshaking

    _CONFIGURATION 4.3 Hardware Handshaking Hardware handshaking requires the following serial command to activate: JC1< Hardware handshaking is deactivated by sending the serial command: JC0< See “HARDWARE HANDSHAKING” on page 29 for additional information. FRONT REAR S1 S2 Figure 5: DIP Switch Location in ACX3200 and ACX3400 Figure 6: Typical DIP Switch S1 Positions, RS-232 Table 3: DIP Switch Settings Baud...

  • Page 19: 4.4 Rs-422 Interface

    _CONFIGURATION 4.4 RS-422 Interface All ACXxx11 models can be configured with an RS-422 electrical interface. In this configuration, the standard serial protocol may be used but with a dedicated serial line. To enable RS-422, move switch S1-3 and S1-5 to the ON position. Figure 7: Typical DIP Switch S1 Positions, RS-422 4.5 RS-485 Interface The RS-485 port, used on all ACXxx11 models, is the primary interface for con-...

  • Page 20: 4.6 Selecting Number Of Cm Inputs

    _CONFIGURATION Additional information on RS-485 communication is provided in Section 10.0: RS-485 SERIAL INPUT/OUTPUT, page 50. 4.6 Selecting Number of CM Inputs The ACX operates with one or two CM inputs. To configure the ACX for the num- ber of CMs in the system, set switch S2-2 as defined below: Table 5: CM Selection Number of CMs S2-2...

  • Page 21: 4.8 Factory Default Switch Positions

    _CONFIGURATION 4.8 FACTORY DEFAULT SWITCH POSITIONS Table 7: Factory Default Switch Positions Default Switch Function Result Position S1-1 Baud Rate 9600 Baud S1-2 Baud Rate 9600 Baud S1-3 Parity/Stop No Parity, 1 stop Bit S1-4 Parity/Stop No Parity, 1 stop Bit S1-5 RS-485/422 RS-232 Enabled...

  • Page 22: 4.10 Interfacing To Acx Rear Panel

    CM(s) and pro- CM2 +15 VDC +15 VDC Power for CM2 vides management of “common” Not used Not used and “ground” signals. Celerity rec- Not used Not used ommends that CM power should MDVX Chassis Ground Chassis ground for the MDVX...
  • Page 23 The Pressure Signal Input accepts a 0-10 VDC signal that is linearly proportionally to the pressure from zero to the full scale range of the CM. The ACX can supply power for up to two Celerity heated or unheated CMs. DB-25...
  • Page 24 _CONFIGURATION MDVX AMPHENOL DB-25 VALVE OPEN VALVE SIGNAL PHASE 4 VALVE SIGNAL PHASE 3 VALVE POWER COMMON VALVE CLOSED VALVE SIGNAL PHASE 2 VALVE SIGNAL PHASE 1 VALVE POWER CHASSIS Figure 11: MDVX Device Port Electrical Connections 4.10.5 Auxiliary Port The Auxiliary Port provides an additional means to remotely operate the ACX.
  • Page 25 _OPERATION 5.0 LOCAL OPERATION The ACX3400 Series controllers have a keypad for full system control. Parame- ters are monitored via the illuminated LCD display. The top line of the LCD dis- plays the current pressure, valve position and active setpoint. The bottom line displays the selected setpoint and its value, as well as the STATUS of operation (i.e.
  • Page 26 _OPERATION 5.2.3 PID Phase To modify or view the PID Phase, press the arrow keys until the display reads PID Phase. Press the ENTER key. Use the arrow keys to change the phase set- point number. Press the ENTER key to select the setpoint number. After select- ing the setpoint number the phase value can be viewed or changed.
  • Page 27 _OPERATION ENTER key to command the ACX to change the valve angle to the set value. Press ESC to cancel the operation. 5.2.10 Algorithm Select To select the pressure control algorithm, press the arrow keys until the display reads Algorithm Select. Press ENTER. Use the arrow keys to select the algo- rithm (Adapt, Hybrid, PID, Learn).
  • Page 28 _INTERFACE (SERIAL) 6.0 SERIAL INTERFACE The Serial Port is the primary controlling interface for the ACX. All commands and reporting functions of the ACX are available via the Serial Interface. See “INSTALLATION” on page 9, for connecting the ACX to the host. 6.1 INTRODUCTION To use the serial port, the ACX must be connected to a host device that uses an RS-232, RS-422 or RS-485 communications protocol.
  • Page 29 _INTERFACE (SERIAL) where: The command is an instruction sent to the ACX system. command Every command begins with a command character. Many commands have more than one parameter which [parameter] can be used. A few commands do not require a parameter.
  • Page 30 _COMMANDS (FUNCTIONAL CONTROL) 7.0 FUNCTIONAL CONTROL COMMANDS These commands direct the ACX to open, close, or hold the valve position; acti- vate control at a selected pressure setpoint; or position the valve to a specific valve angle. The following commands do not return values, but perform their intended actions immediately upon receipt.
  • Page 31 _COMMANDS (FUNCTIONAL CONTROL) Function Command Description Page Sets backward 7.26 SET TRIP POINT compatibility. 7.26 SET TRIP POINT Sets pressure trip points. See also “RAMP FUNCTION COMMANDS” on page 36 and “REPORT (STA- TUS) COMMANDS” on page 39. 7.1 SET PRESSURE CONTROL ALGORITHM NOTE: Changing algorithms while controlling pressure may...
  • Page 32 _COMMANDS (FUNCTIONAL CONTROL) 7.3 LEARN ALGORITHM This commands the ACX to use the PID algorithm and generate the PID Phase and PID Gain parameters while going to and controlling at a specific setpoint. When the parameters are selected, the ACX stops controlling and remains in the HOLD mode.
  • Page 33 _COMMANDS (FUNCTIONAL CONTROL) 7.7 GO TO VALVE ANGLE COMMAND Positions the valve at the angle represented by [value]. Syntax: V[value]< The [value] is an ASCII string used to represent the desired valve angle in degrees and tenths of a degree. The maximum allowable valve angle [value] is 99.9 degrees, but the actual limit depends on the setting of the MDV’s limit switches.
  • Page 34 _COMMANDS (FUNCTIONAL CONTROL) 7.10 ZERO THE SENSOR Syntax: Z1< Zero is used to digitally zero the pressure signal in the ACX. Setting a Zero applies an offset value to the current reading. This offset zeros the pressure sig- nal when the pumping system is at base pressure. Before using this function, the ACX’s reported pressure must be less than ±5% of full scale of the CM.
  • Page 35 _COMMANDS (FUNCTIONAL CONTROL) If the pressure is too high after selecting CM2, the reported pressure will always be >102% of the CM2 full scale. The ratio between CM1 and CM2 will determine the reported pressure. If only one CM is configured in a system, this command will not cause any changes in ACX performance or to the reported pressure.
  • Page 36 _COMMANDS (FUNCTIONAL CONTROL) If the ACX receive input buffer gets over 80% full (this is not likely to happen under normal conditions), the ACX will lower the CTS control output signal to inform the host controller to stop sending data to the ACX. Once the input buffer is less than 20% full, the ACX will raise the CTS input signal to inform the host controller that it is ready to receive more data.
  • Page 37 _COMMANDS (FUNCTIONAL CONTROL) The [value] is a one- to five-digit ASCII string used to represent the desired set- point value as a percentage of full scale of the high range sensor (CM1). [value] may vary from 0 to 100.0. Example: Sending any of the following ASCII strings: S110.00<...
  • Page 38 _COMMANDS (FUNCTIONAL CONTROL) Description Commands Control to Setpoint 5 Control to Setpoint 6 Control to Setpoint 7 Control to Setpoint 8 Control to Setpoint 9 Control to Setpoint 10 If the control command is Px (where X is in the range of 0 to 10), or MP, the con- trol algorithm is PID.
  • Page 39 _COMMANDS (FUNCTIONAL CONTROL) figuration. However, by pre-testing the tool and adjusting the gain compensation factor a single gain can be used over a much wider pressure control range. Syntax: GC[value]<< The [value] is any number in the range of >0.0 to <=100.0. Default is 1.0. The gain compensation factor is used to ideally set up a tool while the ACX is configured for 2 CMs and using the PID pressure control algorithm.
  • Page 40 _COMMANDS (FUNCTIONAL CONTROL) Table 18: Set Phase for Setpoint Number Description Command Set Phase Analog Setpoint SP0XXX.XX Set Phase Setpoint 1 SP1/X1XXX.XX Set Phase Setpoint 2 SP2/X2XXX.XX Set Phase Setpoint 3 SP3/X3XXX.XX Set Phase Setpoint 4 SP4/X4XXX.XX Set Phase Setpoint 5 SP5/X5XXX.XX Set Phase Setpoint 6 SP6XXX.XX...
  • Page 41 _COMMANDS (FUNCTIONAL CONTROL) Table 19: Set Trip Point Description Command Set Trip Point 1 ST/T1+XXX.XX Set Trip Point 2 ST/T2+XXX.XX p.35...
  • Page 42 _COMMANDS (RAMP FUNCTION) 8.0 RAMP FUNCTION COMMANDS These commands allow the user to preprogram the ACX with two setpoints called primary and secondary. The ACX will control the pressure to the primary setpoint, delay at that setpoint for up to 100 seconds, then begin changing the pressure until the secondary setpoint is reached.
  • Page 43 _COMMANDS (RAMP FUNCTION) The Secondary Setpoint Delta Time value can be 0. In this case, the ACX automatically changes the setpoint every 100ms. If the Primary Setpoint Delay Time is 0, the ACX begins the ramp to the sec- ondary setpoint as soon as the pressure is within 2% of the primary setpoint. If the Secondary Setpoint Ramp Time is 0, the ACX begins controlling the pressure as fast as the pressure control algorithm allows in order to achieve the Secondary Setpoint as soon as the Primary Setpoint Delay Time expires.
  • Page 44 _COMMANDS (RAMP FUNCTION) 8.3 SET PRIMARY RAMP SETPOINT This sets the value of the primary setpoint. Syntax: PI[value]<< The [value] is a number in the range of 0 to 100% of full scale. This is a settable NON-VOLATILE command. After a power-up sequence, the ACX will be restored to the condition of the last PI command received or to the default value if not previously modified.
  • Page 45 _COMMANDS (REPORT) 9.0 REPORT (STATUS) COMMANDS These commands interrogate the ACX for information on the current values of setpoints, pressure, valve angle, and the Operational Status Word. These com- mands all return a string of characters that represent the requested information and a carriage return and line feed as the output terminator.
  • Page 46 _COMMANDS (REPORT) Function Command Description Page Reports the programmed 9.18 REPORT SETPOINT setpoint. 9.19 REPORT SOFTWARE Reports the current SID/R38 software version. 9.20 REPORT SYSTEM Reports the system PRESSURE pressure. Reports the trip point for a 9.21 REPORT TRIP POINT RT/R specified relay.
  • Page 47 _COMMANDS (REPORT) The (selection) is optional and is used to select individual parameters to report. (selection) is an integer from 0 through 9. Each integer represents a specific parameter to be reported. If the (selection) is omitted, then the parameters 0 through 7 will be reported as an entire string, each one separated by a carriage return or line feed ASCII characters.
  • Page 48 _COMMANDS (REPORT) This character string represents the DSW. The DSW is comprised of five charac- ter strings which represent the results of individual diagnostic tests and must be decoded. The first character string is represented by the characters OO and is used to store the status of the limit switch versus valve angle testing.
  • Page 49 _COMMANDS (REPORT) Table 23: Report Gain Description Command Response Report Gain of Analog Setpoint G0XXX.XX Report Gain of Setpoint 1 RG1/R46 G1XXX.XX Report Gain of Setpoint 2 RG2/R47 G2XXX.XX Report Gain of Setpoint 3 RG3/R48 G3XXX.XX Report Gain of Setpoint 4 RG4/R49 G4XXX.XX Report Gain of Setpoint 5...
  • Page 50 _COMMANDS (REPORT) The ACX responds with Mxyzw< where xyz represents the values in the following tables: NOTE: Note: The w character is added when the ACX is configured for dual CM operation. The first character, designated as ‘x’, is used to represent the currently selected setpoint.
  • Page 51 _COMMANDS (REPORT) The third character, designated as ’z’, is used to monitor the pressure range cur- rently being measured. Table 26: OSW z Codes Character Condition >10% of full scale <10% of full scale The fourth character, designated as ’w’, is used when the ACX is configured for dual CM operation.
  • Page 52 _COMMANDS (REPORT) Description Command Response Report Phase Setpoint 3 RP3/R43 PH3XXX.XX Report Phase Setpoint 4 RP4/R44 PH4XXX.XX Report Phase Setpoint 5 RP5/R45 PH5XXX.XX Report Phase Setpoint 6 PH6XXX.XX Report Phase Setpoint 7 PH7XXX.XX Report Phase Setpoint 8 PH8XXX.XX Report Phase Setpoint 9 PH9XXX.XX Report Phase Setpoint 10 RP10...
  • Page 53 _COMMANDS (REPORT) The ACX responds with SPFxx.xx<< where xx.xx is between 0 and 100% of full scale. 9.16 REPORT SECONDARY SETPOINT DELTA TIME This command reports the value of the secondary setpoint delta time. Syntax: DPT< The ACX responds with DPT xx<<...
  • Page 54 _COMMANDS (REPORT) The ACX responds with the software identification. For example: H536500 Rev x<< where x is the current revision of the ACX software. This is a non-volatile read-only command. 9.20 REPORT SYSTEM PRESSURE This command reports the system (chamber) pressure at the time of the request. The response is a value ranging between -5% and +102% of full scale of the high range sensor (CM1) Syntax: R5<...
  • Page 55 9.23 REPORT VENDOR ID This command reports the vendor product identification. Syntax: VID< The ACX responds with the vendor product identification (Celerity). This is a non-volatile read-only command. 9.24 HELP SCREEN To access the ACX’s help screen, send the following commands: ?<...
  • Page 56 _RS-485 10.0 10.0 RS-485 SERIAL INPUT/OUTPUT The ACX RS-485 serial I/O data link and protocol provide a reliable, low-cost mechanism that supports transmissions to and from up to 32 devices attached within a common network. Each unit is independently addressable with minimal protocol overhead controlled by a common host computer.
  • Page 57 _RS-485 10.0 Transmission rates of 19200, 9600, 4800, 2400 and 1200 baud are switch selectable on the main circuit board. Additional switch options are provided to select either 2 or 4 wire network operation and appropriate line terminations. RS-485 features are enabled by DIP switch settings on the ACX circuit board: •...
  • Page 58 _RS-485 10.0 • an acknowledgment character that signals the ACX has completed transmis- sion and is ready for a new command (or DLE character). The state diagram which follows illustrates the sequence of operations per- formed by the ACX in processing addresses, commands responses, and acknowledgments.
  • Page 59 _RS-485 10.0 The following shows the actions taken by the host and the ACX in order to execute one command per session: Host Computer Receive Address Transmit Address If address received is device address begin receiving all characters Receive command Transmit Command Transmit response (if any) Transmit acknowledgment...
  • Page 60 _INTERFACE (AUXILIARY) 11.0 11.0 AUXILIARY INTERFACE The ACX Auxiliary interface is the secondary controlling interface for the ACX and provides a limited selection of functions when used as the main controlling interface. The Auxiliary interface may be used without the serial interface; how- ever, functions such as programmable setpoints are available only through the serial interface.
  • Page 61 _INTERFACE (AUXILIARY) 11.0 Table 30: Auxiliary Port Pinout Pin Name Active/Range Default Description Analog Analog ground connection Ground for all analog input and output signals. 0-10 VDC or Valve Angle User selectable analog output signal 0-5 VDC Signal Output for valve position indication. (S1-7) 0-10 VDC or User selectable analog output signal...
  • Page 62 _INTERFACE (AUXILIARY) 11.0 Pin Name Active/Range Default Description Chassis Ground Chassis ground connection for cable shielding. Chassis Ground Connection to the normally open contact on Relay 1. When the pressure Relay 1 Open is below the setpoint for Relay 1, the Normally Open relay will energize and change to the closed state.
  • Page 63 _INTERFACE (AUXILIARY) 11.0 RELAY 1 COMMON RELAY 1 NORMALLY OPEN RELAY 1 NORMALLY CLOSED RELAY 2 COMMON RELAY 2 NORMALLY OPEN RELAY 2 NORMALLY CLOSED Figure 14: Trip Point Relays Electrical Pinouts 11.2 CONTROL INPUTS 11.2.1 Hold/Control Select (Pin 11) HOLD commands the valve to stop and remain at the current position. Hold is active high and is released by connecting the input to digital ground.
  • Page 64 _INTERFACE (AUXILIARY) 11.0 The ACX will not zero the CM if the pressure is greater than 5% of full scale or if pressure control is active. To prevent erroneous pressure control situations, careful consideration should be given to using this function. 11.2.5 Pressure/Valve Input Select (Pin 23) This input is used to select the function of the analog input.
  • Page 65 _INTERFACE (AUXILIARY) 11.0 VALVE OPEN STATUS OPEN VALVE CLOSED STATUS CLOSED VALVE STATUS OUTPUT COMMON Figure 15: Typical Contact Closure Output Circuit 11.3.4 CM Out (Pin 4) This open collector signal indicates which CM is active in dual-sensor configurations. The output is high when CM1 is active, and low when CM2 is active.
  • Page 66 _INTERFACE (AUXILIARY) 11.0 This is an analog output which represents the valve angle. It is provided in 5 mV increments which are directly proportional to the corresponding valve angle from 0° to 90°. This signal must be referenced to the analog ground pin. A signal voltage of 0VDC indicates a valve angle of 0°.
  • Page 67 In the event of improper operation, check all cable connections. The following ACX. If in doubt, contact Celerity immediately. table also provides information for troubleshooting system operation. If this does not address the issue, contact Celerity for further assistance. Table 31: Troubleshooting Table Symptom Probable Cause...
  • Page 68 _APPENDIX APPENDIX A ASCII Character Codes Character Decimal Character Decimal SPACE > " & ’ < Carriage Re Line Feed p.62...
  • Page 69 Serial Port Adaptors Adaptors are available from electronics supply stores or they may be purchased from Celerity. Two types of adaptors are available, DB-9 to RJ-12 or DB-25 to RJ-12. The figures below show the proper pin configuration for these standard adaptors.
  • Page 70 For technical assistance, contact Celerity Technical Support at 972.359.4000. Allen, TX 75013 USA Celerity is a trademark of Celerity, Inc. All other product or service names mentioned in this document may be Telephone 972.359.4000 trademarks of the companies with which they are associated. System descriptions are typical and subject to change without notice.

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