Manual

78 Publication LOGIX-UM001B-EN-P - April 2010
Appendix A Equipment Phase Instructions (PSC, PCMD, POVR, PFL, PCLF, PXRQ, PRNP, PPD, PATT, PDET)
Equipment Phase External
Request (PXRQ)
Use the PXRQ instruction to initiate communication with
FactoryTalk Batch software.
Operands:
Relay Ladder
Structured Text
The operands are the same as those for the relay ladder PXRQ instruction.
PHASE_INSTRUCTION Data Type
Operand Type Format Description
Phase
Instruction
PHASE_INSTRUCTION tag tag that controls the operation
External
Request
request name type of request
For available requests, see
page 81 .
Data Value DINT array tag parameters of the request
For array size and data values,
see page 81 .
If You Want To Then Check
Or Set This
Member
Data Type Notes
determine if a false-to-true transition caused
the instruction to execute
EN BOOL See Timing Diagram of a PXRQ Instruction on page 80 .
determine if the request failed ER BOOL See Timing Diagram of a PXRQ Instruction on page 80.
To diagnose the error, see the ERR and EXERR values.
determine if the FactoryTalk Batch software
has completed its processing of the request
PC BOOL See Timing Diagram of a PXRQ Instruction on page 80.
determine if the FactoryTalk Batch software is
processing the request
IP BOOL See Timing Diagram of a PXRQ Instruction on page 80.
determine if the instruction sent the request
but FactoryTalk Batch software has not yet
acknowledged it
WA BOOL See Timing Diagram of a PXRQ Instruction on page 80 .
WA also = 0 if:
• the connection times out.
• a network error occurs.
• ABORT = 1.
cancel the request ABORT BOOL To abort (cancel) the request, set the ABORT bit = 1.
When the controller aborts the instruction:
• ER=1.
• ERR shows the result of the abort.