OPERATION MANUAL CompoBus/S

C200HW-SRM21-V1 Master Unit for CS-series, C200HX/C200HG/C200HE-(Z)E, and C200HS PLCsSection 4-1
4-1-4 Data Areas in the PLC
1 (ON): Communications participation
The flag won’t change even if the node is withdrawn from the system.
Output Slave Error Flags
These flags indicate the communications status of the Output Slaves (0 to
15). All of these flags are reset when the power is turned ON or operation
is restarted.
0 (OFF): Communications normal or inactive node
1 (ON): Withdrawn from communications (communications error)
Input Slave Error Flags
These flags indicate the communications status of the Input Slaves (0 to
15). All of these flags are reset when the power is turned ON or operation
is restarted.
0 (OFF): Communications normal or inactive node
1 (ON): Withdrawn from communications (communications error)
Note When the CompoBus/S System starts up, inputs from Input Slaves and outputs
to Output Slaves become effective when the Active Slave Flag for the
Slave is turned ON. It is recommended to write a ladder program that verifies
that the Slave’s Active Slave Flag is ON and its Error Flag is OFF before transmitting
or receiving I/O data.
The following table shows the data areas in the CPU that are used by the
Master Unit.
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