360
Checking Operations for CS-series, C200HX/C200HG/C200HE-(Z)E, and C200HS Master Units
Section 6-2
It is possible to write a ladder program that confirms normal operation when a
work bit (a) turns OFF.
A ladder program that checks all the Active Node Flags and Communications
Error Flags in a batch, checks the overall CompoBus/S System operations,
and then performs I/O processing for the Slaves in a batch can also be writ-
ten. For details, refer to the section for CJ-series Master Units under
6-3-4
Checking Normal Operations Using Ladder Programming
.
6-2-4 Troubleshooting
When an error occurs, the indicators of a Master Unit connected to a CS-
series, C2missing00HX/C200HG/C200HE-(Z)E, or C200HS PLC will indicate
the error. Check the Master Unit’s indicators and perform the error processing
described in the following table.
(n + 4 words bit 00)
Input Slave
Bit 00 of node number 0
Normal operation
The system is not always in normal operation
when bit 00 of input Slave 0 is turned ON.
Bit 10400 is ON
and the system
seems to be in
normal opera-
tion.
Normal communications
CompoBus/S Master Unit
Communications
error
Slave
Bit 00 ON
(n + 9 words bit 08)
(n + 9 words bit 00)
Input Slave
Node address 0
Active Node Flag
Input Slave
Node address 0
Communications Error Flag
AR bit
Normal operation
Work bit (a) is ON if input Slave Node 0 is
in normal communication in the network.
Bit 00 of input Slave is used after checking
that the system is in normal operation.
(n + 4 words bit 00)
Input Slave
Node address 0
Bit 00
a
CompoBus/S
Master Unit
Bit 10400 is
ON and the
system seems
to be in normal
operation.
Slave
Bit 00 is OFF when a
communications error
occurs.
Communications error
Wrong
Correct
10900 10908
10400
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