Troubleshooting
11-2
(2) Check the LED state of the slave unit
1. Check the
“LINK” LED.
The
“LINK” LED is flashing
Normal
If the LED is not flashing, refer to P11-4 and remove the cause of the error.
P11-4
2. Check the
“ALM” LED.
The
“ALM” LED is unlit
Normal
If the LED is not unlit, refer to P11-4 and remove the cause of the alarm.
P11-4
11.2 Check using input/output data
(1) Check error detail information
Gateway error codes are stored in the latest error code storage area (input offset byte addresses 4, 5).
P5-3
(2) Check error ID number information, alarm ID number information
Error ID numbers are stored in the error ID number information storage area (input offset byte address
2).
Alarm ID numbers are stored in the alarm ID number information storage area (input offset byte
address 3).
Remove any problems until the error number or alarm number becomes
“0.”
P5-1
(3) Check error occurrence ID information
Error occurrence ID information is stored in the latest error occurrence ID information storage area
(input offset byte addresses 6, 7).
P5-1
(4) Check status detail information
If the occurring error is a slave unit status error, status details (input offset byte addresses 8, 9) of the
target ID can be checked by specifying the target ID (output offset byte addresses 2, 3) and turning on
the slave access request command (6 of output offset byte 0).
P5-1, P5-2, P5-6, P5-7
