1771-2.141, Allen-Bradley Loop Controller Interface Module
Contents
1. Communications timeout Attempted to read an expected response from the ICI for more than 1 second OFH Buffer overrun Storage capacity in LIA receive buffer exceeded RECORD HANDLING ERRORS 1771 LIA 13H Non matching station address PLC attempted to modify or read configuration record using a station address that does not match the station configuration record that was loaded 14H Invalid record number Attempted to process a record number greater than maximum allowed or attempted to read records in wrong order Page 28 Loop Controller Interface Module Cat No 1771 LIA Diagnostic Code Description Explanation 15H Too many requested records Attempted to read more than 4 records at one time exceeds LIA record storage capacity 16H Buffer boundary exceeded Attempted to read or modify data in a record storage area within the LIA that is out of the storage area for that record ICI OPERATIONAL CODES 19H LIL database not updating Return of the response status word from the ICI indicating the LIL data base is not being updated 25H ICI Download error Attempted to download a record to a station that is unable to accept it 1AH LIL interface not online Return of the response status word from the ICI indicating the local instrument link is not present 1CH Data not ready Return of the response status word from the ICI indicating that data has been requested from a station but has not been received by the ICI ICI Codes ICI TR2. Table C Diagnostic Command Summary Diagnostic Code Description Explanation GENERAL COMMAND ERRORS 01H Invalid command Attempted to process an invalid command from the PLC 02H Invalid station address Attempted to access a station address outside the 64 allowed 03H Invalid number of loops Attempted to process more than 12 loops or 0 loops with a set control command 04H Data value out of range Attempted to process a setpoint or valve value greater than 103 396 with a set control command 05H Dual command error Attempted to place the loop controller in 2 opposite modes at the same time with the set contrtol command 06H Invalid loop number Attempted to process a loop number outside the range of 1 or 2 with the set control command 07H Invalid BCD digit Attempted to process an invalid BCD value with the set control command 08H Number of parameters invalid Attempted to request or send too many parameters 09H Too much read data Execution of command resulted in too much data to be returned in a single block transfer OAH Too much write data Attempt to process an LIA command with a word count greater than allowed 26H Unknown error code The LIA is unable to determine an error code returned by the ICI COMMUNICATION ERRORS Checksum error Checksum calculated by the LIA does not match the checksum returned by the ICI for data being returned by the ICI Data overrun Byte count calculated by the LIA does not match the count being returned by the ICI
3. Refer to Moore Products publications AD320 10 Local Instrument Link Computer Interface User s Manual AD352 10 MYCRO 352 Single Loop Digital Controller User s Manual and AD321 40 Model 321 Expansion Satellite Link Interface Communication User s Manual Page 31 Module Location e 1771 I O Chassis Output oltage Range e 0 5V Output Load Current e 60mA maximum Maximum Surge Current e 12 Minimum Load Current e 0 72A Power Dissipation e 4 5W normal Thermal Dissipation e 0 256 BTU minimum Environmental Conditions e Operational Temperature 0 to 60 C 32 to 140 F e Storage Temperature 40 to 85 C 40 to 185 F e Relative Humidity 5 to 95 without condensation Loop Controller Interface Module Cat No 1771 LIA Specifications Conductors e Wire size 14 ga stranded max 3 64 inch insulation max e Category 1 eying Band Positions e Between 12 and 14 e Between 16 and 18 Wiring Arm Screw Tor ue 9 pound inches 1 Refer to publication 1770 4 1 Programmable Controller Wiring and Grounding Guidelines Page 31 ALLEN BRADLEY WU ROCKWELL INTERNATIONAL COMPANY With offices in major cities worldwide WORLD EUROPE MIDDLE HEADQUARTERS EAST AFRICA Allen Bradley HEADQUARTERS 1201 South Second Street Allen Bradley Europe B V Milwaukee WI 53204 USA Amsterdamseweg 15 Tel 1 414 382 2000 1422 AC Uithoorn Telex 43 11 016 The Netherlands FAX 1 414 382 4444 Tel
4. Depending on the application you must also be familiar with Moore Products Model 321 Local Expansion Satellite LES Proper operation of the Loop Controller Interface Module depends upon correct setup of the Model 320 ICI Set the ICI as follows Parameter setup Switch Location ICI link address serial board SW1 2 Baud rate serial board W7 RS 232 C RS 422 serial board W5 W6 Transmission method MPU board SW5 closed Link Acknowledgement Delay Enabled MPU board SW4 open Null filling Enabled MPU board SW3 open Send command security Disabled MPU board SW1 2 Format 1 start 8 data 1 stop SW2 8 off SW2 4 on no parity Note The 1771 LIA provides an interface with up to 61 Moore Products 352 controllers depending on the Moore hardware configuration The 1771 LIA uses one Model 320 ICI to provide access to either Moore s lower instrument link addresses 1 32 or to the upper instrument link addresses 33 64 You can use the Model 321 LES to join both lower and upper instrument links to provide a total of 64 link addresses Note that the Moore Products Model 320 requires one link address and the Model 321 requires two link addresses If you have a Model 321 you can address Moore 320 321 and 352s from 1 to 64 Therefore you can interface with up to 61 Model 352s If you don t use a Model 321 you can address Moore Models 320 and 352 from 1 to 32 or 33 to 63 Therefore you can interface with up to 31 Model 352s
5. The offset plus number of bytes 1 cannot exceed 256 Figure 24 Modify Configuration Command File BTW Record number 4 0 0 Number of bytes 5 Record byte 1 Record byte 2 n Record byte n Figure 25 Write Configuration Word Bit Definition Word Description Data format Range number 1 Block header 2 BCD 1 to 64 Page 23 Loop Controller Interface Module Cat No 1771 LIA Write Configuration An acknowledge block will be returned to the PLC indicating either a good Acknowledge response or an error condition in sending the data to the 1771 LIA configuration buffer The acknowledge block format is shown below Figure 26 Write Configuration Acknowledge Block Station address 3 Reserved ICI Command The 1771 LIA ICI command allows the user to send a Moore ICI command to the ICI The ICI performs the necessary byte reversal and adds the command checksum word Page number is a hex value that can be used by the operator to identify multiple command operations No other modification of the command is performed Note The command word count cannot exceed 60 words due to block transfer limitations The ICI command format is shown below Figure 27 ICI Command Block Format Word Bit 13 11 1 9 7 s 4 E 1 1 0 0 Page number Command word count ICI Acknowledge The ICI acknowledge block will be returned to the PLC indicating either a good response or an error condition
6. Acknowledgement Delay Enabled MPU board SW4 open Null filling Enabled MPU board SW3 open Send command security Disabled MPU board SW1 2 Format 1 start 8 data 1 stop SW2 8 off SW2 4 on no parity Note The 1771 LIA provides an interface with up to 61 Moore Products 352 controllers depending on the Moore hardware configuration Refer to Moore Products publications AD320 10 Local Instrument Link Computer Interface User s Manual AD352 10 MYCRO 352 Single Loop Digital Controller User s Manual and AD321 40 Model 321 Expansion Satellite Link Interface Communication User s Manual Page 3 Loop Controller Interface Module Cat No 1771 LIA Installing the Loop Controller Interface Module Page 4 In this section we tell you how to initially handle your loop controller interface module key your I O chassis install your your module and make your wiring connections Initial Handling backplane and wiring arm before removing or installing the loop ATTENTION Remove power from the 1771 I O chassis controller interface module Failure to remove power from the backplane or wiring arm could cause module damage degradation of performance or injury Failure to remove power from the backplane could cause injury or equipment damage due to possible unexpected operation The loop controller interface module contains components which can be damaged by electrostatic discharge The module is shipped in an el
7. Controller Interface Module 1771 LIA Commands FUNCTION COMMAND CODE RESPONSE Change the setpoint output operating mode acknowledge enable LOOP STATUS disable alarms Examine PID parameters alarm limits and output limits READPARAMETER PARAMETER 02H READ PARAM ACK Change PID parameters alarm limits and output limits MOD PARAM Transfer a configuration from a station to a 1771 LIA UPLOAD 04H UPLOAD ACK Transfer a configuration from a 1771 LIA to a station DOWNLOAD DOWNLOAD ACK Transfer a configuration from a 1771 LIA to a PC READ CONFIG C READ CONF ACK WRITE CONFIG 07H CONF ACK ICI COMMAND jos ICI ACK Transfer a configuration from the PC to the 1771 LIA Sends an ICI command to the ICI Loop Controller Interface Module Cat No 1771 LIA Compatibility The user must be familiar with the terminology configuration and operation of Moore Products Model 352 Single Loop Digital Controller SLDC and Model 320 Independent Computer Interface ICI Depending on the application you must also be familiar with Moore Products Model 321 Local Expansion Satellite LES Proper operation of the Loop Controller Interface Module depends upon correct setup of the Model 320 ICI Set the ICI as follows Parameter Switch Location ICI link address serial board SW1 2 Baud rate 9600 serial board W7 RS 232 C RS 422 RS 422 serial board W5 W6 Transmission method Binary MPU board SW5 closed Link
8. LIA Word Description Data format Range number Alarm on off alarms 1 0 no alarm alarms 2 0 no alarm alarms 3 0 no alarm alarms 4 0 no alarm Won n E 1S Alarms disabled local source console source auto mode 0 manual mode external 1 internal ramp 0 ramp off standby sync emergency manual Om a os Loop status 15 7 Process BCD binary 3 3 to 103 3 0H to FFFH 8 Setpoint BCD binary 3 3 to 103 396 0H to FFFH 9 Valve BCD binary 3 3 to 103 396 0H to FFFH Page 14 Loop Controller Interface Module Cat No 1771 LIA Read Parameter The read parameter allows the examination of parameters such as PID parameters alarm limits and output limits Up to 20 parameters from a user specified station address can be sent back to the programmable controller You specify the number of parameters in BCD format 1 to 20 The channel parameter identifies the particular parameter to be read Specify the channel and parameter numbers as 1 less than their actual value For example channel 1 parameter 1 would be 0000H channel 256 parameter 256 would be FFFFH Refer to Moore Products LIL Computer Interface User Manual AD320 for a description of channel parameters Figure 8 Read Parameters Command File BTW and Word Bit Definitions Station address 3 Number of parameters 4 Reserved Data 5 Channel Parameter 24 Channel Parameter F
9. The ICI acknowledge block will contain the following information Page 24 Loop Controller Interface Module Cat No 1771 LIA Figure 28 ICI Acknowledge Block Format wes Pe PP PP PEEP ESP 3 Reserved 4 Diagnostic 0 0 Data Formats The 1771 LIA can interpret two types of data from the PLC Binary and BCD In BCD the value is expressed as a series of four decimal digits 1 digit per nibble The high order digit is restricted in value so that its high order bit can be used as a sign bit This allows indication of a negative value The decimal point is assumed to be one place from the right The 1771 LIA module converts this BCD value to a binary data format for the ICI For example the value 100 2 would be expressed as The value 3 1 would be expressed as In the Binary format data is used directly by the Loop Controller When specifying an absolute value the input range is 3 3 to 103 3 This is represented by a value ranging from 0 to 4095 with 0 being 128 For example the value 103 3 would be The value 096 would be A value of 2096 would be Page 25 Loop Controller Interface Module Cat No 1771 LIA Relative values in the range of 50 to 0 to 50 For example 0 0 0 0 DEI Interpreting the Status Three LED indicators on the front of the loop controller interface module Indicators indicate the operating status of the module figure 29 Use these indicators to aid in troublesh
10. and 9 contain the station loop process setpoint and valve data These values are 4 digit BCD or binary numbers which represent percent of scale 3 3 to 103 3 Negative values have their most significant bit set Figure 6 Loop Status File Format BTR 2 Page number Loop segment acknowledge Data Reserved Global Segment response response Diagnostic code Loop segment number Page 12 Loop Controller Interface Module Cat No 1771 LIA Word Bit 5 Loop status Reserved Loop number Station number 6 Loop status Alarm on off Alarm acknowledge 8 Setpoint 9 Valve Figure 7 Loop Status Command Word Bit Definition Word Description Data format Range number 1 Block header 2 Loop segment acknowledge Oto 11 Page number Hex bit 12 15 3 Segment response Bit Oto 11 1 Station response 0 No station response Global response Bit 12 0 no stations responding 1 normal conditions Bits 13 14 reserved Bit 15 0 data in BCD format 1 data in binary format NE Hex 5 Station number BCD 1 to 64 Loop number BCD 1to2 Bit 10 11 reserved Loop status override high setpoint limit low setpoint limit configuration hold 6 Alarm acknowledge alarm 1 not acknowledged 0 ack alarm 2 not acknowledged 0 ack alarm 3 not acknowledged 0 ack alarm 4 not acknowledged 0 ack r on n E 1 Page 13 Loop Controller Interface Module Cat No 1771
11. bits allow the user to select which loop segment is to be executed for this particular set control command Loop Controller Interface Module Cat No 1771 LIA Word 3 contains the data and number of loops information The data bit value identifies the data type being sent Data is in BCD or binary Number of loops identifies how many loop segments are being used by this set control command Word 4 is reserved for future use Word 5 is used to identify the physical station address and loop being accessed and whose status is being returned Note If this loop segment data bit is not set status will still be returned for this station loop see word 2 above Word 6 contains the bits that enable disable or acknowledge alarms Refer to figure 5 for an explanation of these bits Word 7 determines if a new setpoint or valve value will be sent for this loop segment Word 7 also contains the loop control bits which control the operating conditions for this station loop Word 8 holds the new setpoint value in BCD or binary to be sent Word 9 contains the valve value in BCD or binary to be sent Setpoint or valve values are 4 digit BCD or Hex numbers which represent percent of scale These values range between 3 3 OH and 103 3 FFFH Negative values have their most significant bit set For example a setpoint of 50 BCD would be entered as 0500 The decimal point is implied before the least significant bit A value of 3 3
12. would be entered as 8033 the most significant bit represents the negative sign If an error is encountered during processing of a set control command for a particular station the set control command will bypass the loop segment in error and attempt to complete the process Loop status will be returned to the PLC indicating the error and the segment number it occurred in Page 9 Loop Controller Interface Module Cat No 1771 LIA Figure 4 Set Control Format Block Transfer Write we Pe PPP PPE PES P 2 Page number Loop segment select 3 Data Reserved Number of loops 4 Reserved dc Meats hee igh ela Ad ate Loop Segment 5 Reserved Loop number Station number 6 Reserved Alarms Alarms Alarm disable Alarm enable Alarm acknowledge in out of service service 7 Set p Reserved Loop control oint 8 Setpoint 9 Valve Loop Segment Reserved Loop number Station number Alarms Alarm disable Alarm enable out of service Reserved Alarms Alarm acknowledge in service 62 Valve Set p Reserved Loop control oint 63 Setpoint 64 Valve Figure 5 Set Control Command Word Bit Definitions Word Description Data format Range number 1 Block header BCD always 0001 2 Loop segment select Bit Oto 11 1 output this loop segment data 0 ignore this loop segment data Page number Hex bit 12 15 0 to BH 3 Number of loops BCD Bit 8 14 reserved 1 to 12 Page 10 Lo
13. 31 2975 43500 Telex 844 18042 FAX 31 2975 60222 Publication 1771 2 141 June 1989 As a subsidiary of Rockwell International one of the world s largest technology companies Allen Bradley meets today s challenges of industrial automation with over 85 years of practical plant floor experience More than 11 000 employees throughout the world design manufacture and apply a wide range of control and automation products and supporting services to help our customers continuously improve quality productivity and time to market These products and services not only control individual machines but integrate the manufacturing process while providing access to vital plant floor data that can be used to support decision making throughout the enterprise ASIA PACIFIC CANADA LATIN AMERICA HEADQUARTERS HEADQUARTERS HEADQUARTERS Allen Bradley Hong Kong Allen Bradley Canada Allen Bradley Limited Limited 1201 South Second Street Room 1006 Block B Sea 135 Dundas Street Milwaukee WI 53204 USA View Estate Cambridge Ontario NIR Tel 1 414 382 2000 28 Watson Road 5X1 Telex 43 11 016 Hong Kong Canada FAX 1 414 382 2400 Tel 852 887 4788 Tel 1 519 623 1810 Telex 780 64347 FAX 1 519 623 8930 FAX 852 510 9436 Printed in USA
14. ANSMISSION ERRORS 80H Timeout between characters 81H Invalid data or bad character 82H Invalid command 83H Invalid request 84H Word count error 85H Checksum error 86H Message overflow 87H Parity or framing error LIL INTERFACE ERRORS 88H Transfer prevents command execution 89H Station not in global database 8AH Data not available 8BH Local link buffers full 8CH Global database not ready 8DH Parameter send abort timeout 8EH Record transfer abort timeout 8FH Record transfer abort not ready Page 29 Loop Controller Interface Module Cat No 1771 LIA Diagnostic Code Description LIL HARDWARE FAILURES Link not present Explanation On board dual port board 92H Local RAM 93H ROM check 94H Link physical interface failure 97H Off board dual port RAM ICI HARDWARE FAILURE 99H ICI buffer RAM 9AH Local RAM 9BH ROM check 9CH Piggyback board 9DH Receive timeout 9EH Transmit timeout LINK COMMAND ERRORS A1H Transmission problem A2H Destination buffers full Destination station offline Gateway offline Link command checksum error CHANNE ACTIVE MODULE ACTIVE O O O O O O Page 30 Loop Controller Interface Module Cat No 1771 LIA Compatibility The user must be familiar with the terminology configuration and operation of Moore Products Model 352 Single Loop Digital Controller SLDC and Model 320 Independent Computer Interface ICI
15. Allen Bradley Loop Controller Interface Module Cat No 1771 LIA Introducing the Loop Controller Interface Module Publication 1771 2 141 June 1989 The Loop Controller Interface Module Cat No 1771 LIA allows PLC 2 PLC 3 and PLC 5 family programmable controllers to communicate with Moore Products Model 352 single loop PID controllers via the Model 320 Independent Computer Interface The loop controller interface module receives generic and controller specific commands from the Programmable Controller PC and interprets verifies and processes them by generating the necessary link to the loop controllers The 1771 LIA module can communicate with up to 31 loop controllers through an RS 422 serial link The Loop Controller Interface Module can monitor change setpoint valve and operating mode and acknowledge set reset alarms define station address loop numbers for status reporting to the programmable controller examine change PID parameters alarm points and output limits transfer configuration to a loop controller programmable controller or receive a configuration from a programmable controller PN 955104 98 Loop Controller Interface Module Cat No 1771 LIA Description of the Loop The Loop Controller is shown in figure 1 Interface Module commands are Controller Interface Module shown in table A Figure 1 Page 2 Loop Controller Interface Module Cat No 1771 LIA Table A Loop
16. Data type and command must be provided to specify the parameter data type and source of the parameter data Refer to Moore Products publication AD320 for definition of these terms In general channel and parameter addresses are specified as 1 less than their actual numeric value For example channel 1 parameter 1 would be OOOOH Refer to Moore Products LIL Computer Interface User Manual AD320 10 for a description of channel parameters Loop Controller Interface Module Cat No 1771 LIA Figure 12 Modify Parameters Command File Format BTW wes Pe PP PP PEEP ESP 2 0 0 Station address 3 0 0 Number of parameters 4 Channel Parameter 5 Type Command Number of data words 6 Data value word 1 n 5 Data value word n n 6 Channel Parameter n 7 Type Command Number of data words n 8 Data value word 1 m n 7 Data value word m Figure 13 Modify Parameters Command Word Bit Definitions Word Description Data format Range number 2 Station address 1 to 64 3 Number of parameters BCD 1 to 10 Page 17 Loop Controller Interface Module Cat No 1771 LIA Word Description Data format Range number 5 Type Hex bits 12 15 0 Record send acknowledge 1 16 bit integer absolute 2 16 bit integer relative 3 16 bit multi discrete mask on 4 16 bit multi discrete mask off 5 Reserved 6 32 bit floating point absolute 7 32 bit floating point relative 8 multibyte data messages 9 32 bit integer absol
17. atus is returned for each set control command Loop status contains information for up to 12 individual control loops determined by the station and loop numbers entered in the set control command The data in this file represents each specified loop controller s current process setpoint valve alarms and status The status of the 1771 LIA and the Model 320 ICI is also presented in this file Loop status file format is shown in figure 6 Loop Status File Refer to figures 6 and 7 Word 1 block header indicates that this is the beginning of the loop status file Word 2 contains page number which identifies this status information with its parent set control command and loop segment acknowledge bits that indicate if the loop segment selected in the set control command executed properly Word 3 contains bits which indicate whether a station is responding no response and if no stations in this status page are responding global response Word 4 contains a diagnostic code identifying any error condition and the loop segment number indicating what segment in the set control command was in error if applicable Refer to table C at the rear of this publication for definitions of the diagnostic codes Word 5 displays loop status bits loop number and station number whose status is displayed in a particular segment Up to 12 loops can be monitored at a time Word 6 contains loop status and alarm bits for this station loop Words 7 8
18. ault value of 00 allows the module to determine the proper file length You will also need to allocate portions of the data table for the files related to the module s commands The Set Control command is used to supply basic control and status command changes to one or more loop controllers connected to the local instrument link LIL It also determines what information is returned in LOOP STATUS A single set control block may be used to address up to 12 loops Multiple set control commands must be used to address more than 12 loops The set control command enables the programmable controller to select the operating mode of the SLDC enter the value of a new setpoint or valve enable and acknowledge alarms select SLDC status information The programmable controller sends the set control command to the LIA module via block transfer write instructions The module interprets the command and sends the appropriate message out to the loop controller over the RS 422 serial link through the ICI Important The loop controller must be in the manual mode to change a valve The loop controller must be in automatic mode when changing a setpoint Word 1 of the set control file figures 4 and 5 is the block header This word indicates the beginning of the set control file Word 2 identifies the page and loop segment selected The page number in hex is used to identify this particular set control command and its status Loop segment data
19. ber of the bit which controls that ATTENTION The field wiring arm terminal identification output Page 6 Loop Controller Interface Module Cat No 1771 LIA Figure 3 Wiring the Loop Controller Interface Module and the Model 320 Independent Computer Interface A Allen Bradley Programmable 0 Controller 1 PC 2 3 4 Block Read Response 5 1771 T O Chassis 6 Block Write 7 Command Q E z E 8 8 S Moore Model 352 Loop Controllers RS422 1771 Field Wii a ae Moore Model 320 Independent Computer 31 maximum Interface ICI Local Instrument Link LIL 1771 LIA Model 320 ICI Wiring Arm Wiring Strip D 5 1 2 4 3 4 7 A 8 9 0 10 Page 7 Loop Controller Interface Module Cat No 1771 LIA Programmable Controller Data Table Requirements Set Control Command Page 8 You must allocate two blocks of memory within the programmable controller s data table for use by the interface module The module requires this memory for block transfer read and write files Refer to the appropriate programmable controller user s manual for information on how to set up the data table The maximum length of the block transfer write BTW file is 64 words Set the length of the write file to the default value of 00 The maximum length of the block transfer read BTR file is 64 words Set the length of the read file to the default value of 00 Setting the length of the files to the def
20. ectrostatic shielded bag for protection Follow the handling procedures outlined below to guard against damage to your module ATTENTION Under some conditions electrostatic discharge can degrade performance or damage the module Read and observe the following precautions to guard against electrostatic damage Touch a grounded object to discharge yourself before handling the module Do not touch the backplane connector or connector pins If you configure or replace internal components do not touch other circuit components inside the module If available use a static safe work station When not in use keep the module in its static free shield bag Keying the I O Chassis Use the plastic keying bands shipped with each I O chassis to key your I O slots to accept only this type of module Place the keying bands on the chassis backplane between 12 14 16and 18 Connecting the Loop Controller to the Module Loop Controller Interface Module Cat No 1771 LIA Slots on the rear edge of the circuit board figure 1 are matched to these slots to allow insertion of this type of module You can key any connector in an I O chassis to receive this module except for the left most connector reserved for adapter or processor modules Inserting the Module Into the Chassis 1 Position the module so that the circuit board on the rear of the module lines up with the top and bottom card guides in the chassis 2 S
21. ge 20 Loop Controller Interface Module Cat No 1771 LIA Download Acknowledge The format of the download acknowledge block is shown below Figure 20 Download Acknowledge Block Format Reserved Diagnostic Read Configuration The read configuration command allows transfer of information from the 1771 LIA configuration buffer to the programmable controller This command must be preceeded by an upload command The configuration data for the loop controller can be found on four 256 byte records The maximum file length allowed for a BT is 64 words A complete record request requires 256 bytes 128 words Since an overhead of 4 words is required for the upload file a single record request cannot exceed 60 words 120 bytes Therefore 12 block transfers need to be performed if a complete configuration upload 1 Kbytes is desired The record number is the record address containing the data to be returned It has a maximum range of 0 FH The offset is the offset from the beginning of the record where the data transfer begins and has a range of 00H to FFH figure 20 The number of bytes transferred is the number of bytes beginning at the record plus the offset figure 20 This is in the range of 01H to 78H The offset plus number of bytes 1 must not exceed 256 Page 21 Loop Controller Interface Module Cat No 1771 LIA Figure 21 Read Configuration Command File BTW Record number Number of by
22. igure 9 Read Parameter Word Bit Definitions Data format Word number Description Block header Station address Number of parameters Channel Binary Parameter Binary Read Parameter Acknowledge acknowledge block will be returned to the PLC via block transfer read indicating a good response or an error condition after processing the read parameter command The 1771 LIA will return the requested parameter data in Page 15 Loop Controller Interface Module Cat No 1771 LIA the form shown in the following table The diagnostic code in word 4 identifies any error condition resulting from the read parameter command Refer to table C at the rear of this publication for definitions of the diagnostic codes Figure 10 Read Parameter Acknowledge Format and Word Bit Definitions Station address 3 0 0 Number of parameters 4 Diagnostic 0 Data 5 Parameter data 1 24 Parameter data 20 Figure 11 Read Parameter Acknowledge Word Bit Definitions Word Description Data format Range number 5 24 Parameter data Binary Modify Parameters Page 16 The modify parameters command allows you to modify parameters such as PID parameters alarm limits and output limits You can specify up to 10 parameters to alter for a specified station Note that the total length of the modify parameter command cannot exceed 64 words You must specify the channel and parameter to be modified
23. lide the module into the chassis 3 Press firmly to seat the module in the chassis backplane connector 4 Swing the module locking latch down into place over the front edge of the module You make connections to the module through the 1771 WA field wiring arm The arm pivots on the I O chassis to connect with terminals on the front of the module and acts as a terminal strip The wiring arm allows the module to be removed from the chassis without disconnecting wiring Make certain all power is removed from the module before making wiring connections 1 Swing the wiring arm up into position on the front of the module The locking tab on the module will secure it into place 2 Make your connections to the field wiring arm as shown in figure 2 Use the label on the front of the wiring arm to identify your wiring NOTE Use twinaxial cable cat no 1770 CD or an equivalent shielded twisted pair cable with a minimum impedance of 60 ohms and a maximum capacitance of 75pF per meter for the serial link Do not exceed 4000 ft Page 5 Loop Controller Interface Module Cat No 1771 LIA Figure 2 Preparing the Connecting Wiring 3 Refer to figure 2 Strip 2 inches of the outer insulation from the cable end which will connect to the wiring arm 4 Remove exposed foil 5 Strip 3 8 inch of insulation from the end of each wire 6 Connect the wires to the swing arm as shown in figure 3 number is not the same as the num
24. ooting The red MODULE FAULT indicator lights when a communication problem exists either the ICI or 1771 LIA The yellow CHANNEL ACTIVE indicator blinks during normal operation It is on when the module receives data and is off when the module is sending data The green MODULE ACTIVE indicator lights when power is applied and the module passes its power up test Figure 29 Loop Controller Interface Module Diagnostic Indicators ACTIVE O O O O O O Page 26 Loop Controller Interface Module Cat No 1771 LIA Table B Interpreting the Indicator Lights on the Loop Controller Interface Module Indication Probable cause Corrective action MOD ACTIVE green ON Normal operation MOD FAULT red OFF CHANNEL ACTIVE yellow flashing MOD ACTIVE green OFF Module has failed to power up correctly Cycle power to module MOD FAULT red OFF Check power connectins on field wiring arm CHANNEL ACTIVE yellow OFF Replace faulty 1771 LIA module MOD ACTIVE green ON Communications have been lost between the Check field wiring arm connections MOD FAULT red ON 1771 LIA and the ICI Check operation of the ICI CHANNEL ACTIVE yellow ON or OFF Page 27 Loop Controller Interface Module Cat No 1771 LIA Diagnostic Codes The following table describes the diagnostic and ICI error codes returned in the Acknowledge block when an error occurs The diagnostic code provides you with a quick reference to the problem
25. op Controller Interface Module Cat No 1771 LIA Data format Range Bit 15 0 data format BCD 1 data format binary 0000 BCD 1 to 64 1102 Bits 1 alarm 1 ack 0 no action 1 alarm 2 ack 0 no action 1 alarm ack 0 no action 1 alarm 4 ack 0 no action Bit 4 alarm 1 enable 0 no action 5 alarm 2 enable 0 no action 6 alarm 3 enable 0 no action 7 alarm 4 enable 0 no action it 1 alarm 1 disable 0 no action 1 alarm 2 disable 0 no action 1 alarm 3 disable 0 no action 1 alarm 4 disable 0 no action Bit 12 1 alarms out of service 0 no action Bit 13 1 alarms in service 0 no action 14 15 Reserved 0 local source 0 no action 1 console source 0 no action 2 auto mode 0 no action 3 manual mode 0 no action 4 1 external 0 no action 5 6 7 8 Word number Description Reserved Station number Alarm ack Alarm enable Alarm disable Alarms out of service Alarms in service Loop control 1 1 1 1 1 internal 0 no action 1 ramp on 0 no action 1 ramp off 0 no action 13 Reserved Setpoint 14 1 use word 8 new setpoint 15 1 use word 9 new valve 3 3 to 103 3 0H to FFFH 9 New valve BCD binary 3 3 to 103 396 0H to FFFH Page 11 New setpoint BCD binary Loop Controller Interface Module Cat No 1771 LIA Loop Status Loop st
26. se data is to be recorded For example if all four records are to be uploaded the start address would be 08H and the end address would be OBH Figure 15 Upload Configuration Command File BTW Station address Figure 16 Upload Configuration Command File BTW Block header End Start Station address Page 19 Loop Controller Interface Module Cat No 1771 LIA Upload Acknowledge An upload acknowledge block is returned to the PLC by the 1771 LIA after every upload command The upload acknowledge block indicates either a good response or an error condition The upload acknowledge block format is shown below Figure 17 Upload Acknowledge Command Format Station address 3 Reserved Download The download function is used to transfer the contents of the 1771 LIA configuration buffer to the specified loop controller It results in a record send transaction to the ICI for each configuration record END specifies the ending record to down load If all 4 records of a Moore 352 controller are to be transferred START would equal 08H and END would equal OBH NOTE The receiving station must be in the configuration hold mode prior to execution of this command The format of the download command is shown below Figure 18 Download Configuration Block 2 End Start Station address Figure 19 Download Command Word Bit Definitions Word Description number 1 Block header 2 Station address Pa
27. tes Figure 22 Read Configuration Word Bit Definition Word Description Data format Range number 1 Block header 2 BCD 1 to 64 Read Configuration An acknowledge block will be returned to the PLC indicating either a good Acknowledge response or an error condition in obtaining the requested data from the 1771 LIA configuration buffer The acknowledge block format is shown below Figure 23 Read Configuration Acknowledge Block Word Bit s 13 E 11 1 9 7 E 4 E 1 1 0 0 6 2 0 0 Station address ER 5 Record byte 1 Record byte 2 n Record byte n Reserved Diagnostic Page 22 Loop Controller Interface Module Cat No 1771 LIA Write Configuration The write configuration command allows the transfer of information from the programmable controller to the 1771 LIA configuration buffer The length of the record being transferred cannot exceed 60 words 120 bytes The station address is the station whose data record is in the 1771 LIA buffer This address must match the address stored in the LIA configuration buffer in order for processing to be completed The record number is record address containing the data to be returned The maximum range is 0 FH The offset is the offset from the beginning of the record where the data transfer is to begin Offset range is 00H to FFH The number of bytes is the number of bytes beginning at the record plus the offset to be transferred This range is 01H to 78H 1 to 120
28. ute A 12 bit integer plus range absolute B F not used Command Hex bits 8 11 0 3 not used 4 parameter send from a local source 5 parameter send from a console source 6 parameter send from a computer source 7 parameter send from any source 8 F not used Modify Parameter An acknowledge block is returned to the PLC by the 1771 LIA after every Acknowledge modify parameter command The acknowledge block indicates either a good response or an error condition The diagnostics code in word 4 identifies any error condition resulting from the modify parameter command Refer to table C at the rear of this publication for definitions of the diagnostic codes Block format is shown below Figure 14 Modify Parameters Response File BTR we Pe PP PP PEEP ESP 2 0 0 Station address 3 Reserved Upload The upload function is used to transfer configuration data from the specified loop controller to the configuration buffer on the 1771 LIA The full database consists of a 1Kbyte buffer with 4 records of 256 bytes each The upload Page 18 Loop Controller Interface Module Cat No 1771 LIA command will trigger generation of a record request to the ICI An acknowledgement of the upload command is returned in the form of a block transfer file similar to the upload command block Start and End specify the starting and ending addresses of the records to be uploaded Station address is the address of the station who
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