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Related Manuals for Kenco KT Series
Summary of Contents for Kenco KT Series
- Page 1 DDA Interface Manual “KT” Series Magnetostrictive Liquid Level Transmitters Kenco Engineering Company 10001 East 54th Street Tulsa, Oklahoma 74146 Phone: 918-663-4406 Fax: 918-663-4480 Website: www.kenco-eng.com Email: info@kenco-eng.com 79862 (Rev. #) [5-2-19]...
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Page 2: Table Of Contents
DDA Interface Manual Table of contents 1. Terms and Definitions ..............3 2. Introduction .................5 3. Safety Instructions ..............5 4. Quick Start-Up Guide ..............5 4.1 Before You Begin ..............5 4.2 Quick Start-Up Procedure ............. 5 5. Display Menu ................5 5.1 Operation Modes ..............5 5.1.1 Run Mode .............. -
Page 3: Terms And Definitions
DDA Interface Manual FOUNDATION™ fieldbus 1. Terms and definitions An all digital, serial, two-way communications system that serves as the base-level network in a plant or factory automation environment. Developed and administered by the fieldbus FOUNDATION™. 6A Heavy Oils ‘Generalized Crude Oils’, Correction of Volume to 60 °F against API Gravity. - Page 4 DDA Interface Manual Strap Table A table of measurement correlating the height of a vessel to the volume Mass that is contained at that height. The transmitter can contain up to 100 The property of a body that causes it to have weight in a gravitational points.
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Page 5: Introduction
5. Display Menu might affect the life and health of personnel or cause material damage are highlighted by the preceding pictogram, which is defined below. All liquid level transmitters are shipped with a Stylus (Kenco Part # Symbol Meaning 79857) to be used for manipulating the display. For single and dual... -
Page 6: Display Diagram
DDA Interface Manual 5.3 Menu Structure Note: Whenever program mode is exited from the display the unit will reset • Data From Device itself to insure all changes have been accepted. The reset will take ƒ Display approximately 5 seconds before the level transmitter is able to respond ƒ... -
Page 7: Error Codes (Faults)
DDA Interface Manual Fault Description Corrective Action 7. Error Codes (Faults) Code DAC Fault 4 Cycle power to sensor. If proper operation Fault Description Corrective Action is not restored, Contact Factory. Code SPI Fault 1 Cycle power to sensor. If proper operation Missing 9HULI\ )ORDW &RQ JXUDWLRQ LV FRUUHFW IRU WKH is not restored, Contact Factory. -
Page 8: Hardware And Software Environments
DDA Interface Manual unique switch programmable hardware address that is issued by the 9. Hardware and software environments host computer to activate a particular transmitter. In addition, the DDA hardware supports a command decoder that supports up to 128 different The DDA digital transmitter operates in a networked, intrinsically safe commands. -
Page 9: Dda/Host Computer Communication Protocol
DDA Interface Manual 10.2 Address byte 11. DDA/Host computer communication protocol Example 2: The DDA/Host computer communication protocol consists of two parts: X X X X X X X 1 the interrogation sequence generated by the host computer and the data response generated by the interrogated DDA transmitter. - Page 10 DDA Interface Manual After the DDA transmitter has retransmitted its local address and Checksum Calculation Example 8: received command, it will perform the requested measurement as <STX><dddd.ddd><ETX><ccccc> defined by the received command. After the requested measurement has been completed, the data for that measurement will be transmitted to the host in a predefined format including certain control characters.
- Page 11 DDA Interface Manual 11.3 Network protocol/timing considerations transmitter The DDA network has several timing constraints that must be considered when designing and coding communication drivers. The DDA network follows the RS-485 standard which defines a multi-drop communication interface that uses differential drivers and receivers operating in half- duplex mode.
- Page 12 DDA Interface Manual Address/Command echo and the requested data. cannot be interrogated until time period ‘T12’ = 50 milli- Before the driver is disabled, the software must insure that seconds has elapsed. the command byte has been completely transmitted. This can be done by observing control flags from ‘UART’...
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Page 13: Dda Command Definitions
DDA Interface Manual 12. DDA Command definitions of decimal character • Fixed at two (2) characters to the right of decimal character • Five (5) character checksum appended after the ‘<ETX>’ character 12.1 Special control commands Command 00 Hex (0 Dec) - Transmitter disable command Command 0C Hex (12 Dec): Output level 1 (product) at 0.001 inch resolution (with checksum) This command can be used to disable an active transmitter (force... -
Page 14: Temperature Commands
DDA Interface Manual Data format: <STX><dddd.ddd:dddd.ddd><ETX><c- of decimal character in each data field cccc> • Fixed at one (1) character to the right of each decimal character in • Variable length record with one (1) to four (4) characters to the left each data field of each decimal character in each data field •... -
Page 15: High-Level Memory Read Commands
DDA Interface Manual 12.4 Multiple Output Commands (continued) • Variable length record with one (1) to four (4) characters to the left Command 29 Hex (41 Dec): Level 1 (product) at 0.01 inch resolution, of decimal character in first data field and average temperature at 0.2 °F •... -
Page 16: High-Level Memory Write Commands
DDA Interface Manual Command 4D Hex (77 Dec): Read float zero position data (float #1 and #2) • The fifth data field is the control variable for innage/ullage level Data format: <STX><dddd.ddd:dddd.ddd><ETX><ccccc> output • The sixth data field is reserved for future use; the output value for Command 4D Hex (77 Dec) (continued): this field is ASCII ‘0’... - Page 17 DDA Interface Manual • ASCII colon (:) is the ‘number of floats/number of DTs’ field and consist of the following six components: separator • ‘<EOT>’ is ASCII 04 Hex 1. Host issued command (Part 1): <address><command> 2. DDA transmitter response: <address><command> echo DDA Transmitter Response (verification sequence) 3.
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Page 18: Diagnostic/Special Command Set
DDA Interface Manual • The first data field contains one (1) character that controls which ‘DT 12.7 Diagnostic/Special command set position’ memory location is written to (i.e. DT position #1, 2, 3, 4 enum alarmStatusBits or 5) INTERFACE_ALARM_HIGH = 0x0001 •... -
Page 19: Dashboard, Setup Software
DDA Interface Manual 13. Dashboard, setup software Adjustments to the calibration and set up parameters of the transmitter can be performed using the Dashboard package. The software can be run from any PC using a RS-485 to RS-232 converter. Note: You must use a RS-485 converter with ‘Send Data Control’... -
Page 20: Rq Jxudwlrq
DDA Interface Manual 13.2 Home screen (Cont.) Across the bottom of the Home Screen is the visual indication of the fault Device Address: 7KH HQG XVHU FDQ FRQ JXUH WKH ''$ DGGUHVV codes from section 7. Green indicates no fault and red indicates fault. Default address is 192. -
Page 21: Temperature Settings
DDA Interface Manual Factory Set: 13.5 Level settings (Cont.) Factory Set: Number of Sensors: 'H QHV KRZ PDQ\ WHPSHUDWXUH VHQVRUV WKH OHYHO transmitter is looking for. The number should match the number of Method – Enter Level Offset: a calibration method that directly temperature sensors in the model number. -
Page 22: Save Settings
DDA Interface Manual 13.8 Save settings 13.9 Programming the display The display diagram is shown in section 5.2. The display menu structure is shown in section 5.3. This section explains the details of the programming available under the different sections of the display. The factory password for entering the display is 27513. - Page 23 DDA Interface Manual 13.9.3 Factory (Cont.) Gain Measurement of how large an interrogation signal is used. Do not change without Technical Support. Min Trig Level Threshold level for return signal to qualify as a valid signal and not noise. Temp Setup Allows the user to turn the temperature measurement on or off.
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