OPERATION MANUAL CompoBus/S

Checking Operations for CS-series, C200HX/C200HG/C200HE-(Z)E, and C200HS Master Units Section 6-2
6-2-4 Troubleshooting
360
Wrong
Correct
(n + 4 words bit 00)
Input Slave
Bit 00 of node number 0
CompoBus/S Master Unit
The system is not always in normal operation
when bit 00 of input Slave 0 is turned ON.
Normal operation
Normal communications
Slave
Bit 00 ON
Bit 10400 is ON
and the system
seems to be in
normal operation.
Communications
error
10900
(n + 9 words bit 00)
10908
(n + 9 words bit 08)
AR bit
Work bit (a) is ON if input Slave Node 0 is
Input Slave
Node address 0
Active Node Flag
in normal communication in the network.
Input Slave
Node address 0 Normal operation
Communications Error Flag
a
10400
(n + 4 words bit 00)
Input Slave
Node address 0
Bit 00
Communications error
CompoBus/S
Master Unit
Bit 00 of input Slave is used after checking
that the system is in normal operation.
Bit 10400 is
ON and the
system seems
to be in normal
operation.
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 written.
For details, refer to the section for CJ-series Master Units under 6-3-4
Checking Normal Operations Using Ladder Programming.
When an error occurs, the indicators of a Master Unit connected to a CSseries,
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.
Slave
Bit 00 is OFF when a
communications error
occurs.