116
Communications Status
Section 5-3
Example
• Example of Countermeasure in Ladder Program
If the addresses for Slave 1 and Slave 3
are the same, the Master will not be able
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
status of the actual input will not be
detected.
CompoBus/S
communications path
Disconnection (2)
IR 000
Bits 00 to 07
IR 001
Bits 00 to 07
IR 000
Bits 00 to 07
Slave 3
Node 0 (IN0)
Slave 2
Node 2 (IN2)
Slave 1
Node 0 (IN0)
Node address
duplication (1)
CPM2C-S
20000
00000
20100
00100
(Slave 1 input)
(Slave 2 input)
02800
AR0500
(IN0's Error Flag)
(IN0's Active Flag)
AR0508
(Slave 1 communications normal)
20000
00000
02800
02900
AR0502
(IN2's Error Flag)
(IN2's Active Flag)
AR0510
(Slave 2 communications normal)
20100
00100
02900
Summary of Contents for CPM2C-S100C
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