Omron CPM2C-S100C Operation Manual page 138

Communications Status
CPM2C-S
CompoBus/S
communications path
116
Example
Disconnection (2)
IR 000
Bits 00 to 07
Slave 1
Node 0 (IN0)
00000
(Slave 1 input)
00100
(Slave 2 input)
• Example of Countermeasure in Ladder Program
AR0500
(IN0's Active Flag)
00000
AR0502
(IN2's Active Flag)
00100
IR 001 IR 000
Bits 00 to 07 Bits 00 to 07
Slave 2 Slave 3
Node 2 (IN2) Node 0 (IN0)
If the addresses for Slave 1 and Slave 3
are the same, the Master will not be able
20000
to read input from Slave 3.
If a communications error is generated,
the status of IR 00100 will be the same as
before the error and so the change in the
20100
status of the actual input will not be
detected.
AR0508
(IN0's Error Flag)
02800
AR0510
(IN2's Error Flag)
02900
Section 5-3
Node address
duplication (1)
02800 (Slave 1 communications normal)
20000
02900 (Slave 2 communications normal)
20100