Omron CP1H CPU UNITS - PROGRAMMING 05-2007, Operation Manual

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Auxiliary Area Allocations by Function
Appendix C
Modbus-RTU Easy Master Information
Note DM fixed allocation words for Modbus-RTU Easy Master for serial port 1: D32200 to D32299
DM fixed allocation words for Modbus-RTU Easy Master for serial port 2: D32300 to D32399
Instruction-related Information
Background Execution Information
Name Address Description Access Updated
Serial Port 1 Modbus-RTU
Master Execution Bit A641.00 Turn ON this bit to send a command and receive a
response for serial port 1 using the Modbus-RTU easy
master function.
This bit will be turned OFF automatically by the system
when communications have been completed.
Turned ON: Execution started
ON: Execution in progress.
OFF: Not executed or execution completed. Read-only
Serial Port 1 Modbus-RTU
Master Execution Normal
Flag A641.01 ON when one command has been sent and the
response received for serial port 1 using the Modbus-
RTU easy master function.
ON: Execution normal.
OFF: Execution error or still in progress. Read-only
Serial Port 1 Modbus-RTU
Master Execution Error Flag A641.02 ON when an error has occurred in communications for
serial port 1 using the Modbus-RTU easy master func-
tion. The error code is output to D32352 in the DM fixed
allocation words for Modbus-RTU Easy Master.
ON: Execution error.
OFF: Execution normal or still in progress. Read-only
Serial Port 2 Modbus-RTU
Master Execution Bit A640.00 Turn ON this bit to send a command and receive a
response for serial port 2 using the Modbus-RTU easy
master function.
This bit will be turned OFF automatically by the system
when communications have been completed.
Turned ON: Execution started
ON: Execution in progress.
OFF: Not executed or execution completed. Read-only
Serial Port 2 Modbus-RTU
Master Execution Normal
Flag A640.01 ON when one command has been sent and the
response received for serial port 2 using the Modbus-
RTU easy master function.
ON: Execution normal.
OFF: Execution error or still in progress. Read-only
Serial Port 2 Modbus-RTU
Master Execution Error Flag A640.02 ON when an error has occurred in communications for
serial port 2 using the Modbus-RTU easy master func-
tion. The error code is output to D32252 in the DM fixed
allocation words for Modbus-RTU Easy Master.
ON: Execution error.
OFF: Execution normal or still in progress. Read-only
Name Address Description Access Updated
Step Flag A200.12 ON for one cycle when step execution is started with
STEP(008). Read-only
Macro Area Input Words A600 to
A603 Before the subroutine specified in MCRO(099) is exe-
cuted, the source words for the subroutine are trans-
ferred to A600 through A603 (input parameter words). Read/write
Macro Area Output Words A604 to
A607 After the subroutine specified in MCRO(099) has been
executed, the results of the subroutine are transferred
from A604 through A607 to the specified destination
words (output parameter words). Read/write
Name Address Description Access Updated
DR00 Output for Back-
ground Execution A597 When a data register is specified as the output for an
instruction processed in the background, A597 receives
the output instead of DR00.
0000 to FFFF hex
Read-only
IR00 Output for Background
Execution A595 and
A596 When an index register is specified as the output for an
instruction processed in the background, A595 and A596
receive the output instead of IR00.
0000 0000 to FFFF FFFF hex
(A595: Rightmost digits, A596: Leftmost digits)
Read-only