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Auxiliary Area Allocations by Function Appendix C
Modbus-RTU Easy Master Information (CP1L CPU Units with M CPU Type)
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
Serial Port 2 PT Communi-
cations Flags
A393.00 to
A393.07
The corresponding bit will be ON when the serial port 2
is communicating with a PT in NT link mode.
Bits 0 to 7 correspond to units 0 to 7.
Read-only
RS-232C Port PT Priority
Registered Flags
A393.08 to
A393.15
The corresponding bit will be ON for the PT that has pri-
ority when the serial port 2 is communicating in NT link
mode.
Read-only
RS-232C Port Reception
Counter
(No-protocol Mode)
A393.00 to
A393.15
Indicates (in binary) the number of bytes of data received
when serial port 2 is in no-protocol mode.
Read-only
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
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