IDEC FC4A-C10R2 User Manual page 495

Troubleshooting Diagram 8
Data link communication is impossible.
Is the PWR LED on?
YES
Check port 2 settings using
WindLDR (see pages 25-7 and
25-8).
Is data link selected
for port 2 correctly?
YES
Is M8006 on at
the master station?
YES
Turn off M8006 using WindLDR.
Is the
communication cable
connected to the RS485
port correctly?
YES
Check error codes for the troubled
stations (see page 25-4).
Is the error code
0 at all stations?
YES
For the master station, click the
Reset COMx button (see page
25-11) or turn on M8007 during
operation using WindLDR.
Are error codes
cleared to 0 at all
stations?
NO
Call IDEC for assistance.
NO
See Troubleshooting Diagram 1,
"The PWR LED does not go on."
Select data link for por t 2 correctly and down-
NO
load the user program again (see pages 25-7
and 25-8).
NO
NO
Make sure of correct wiring (see page 25-2).
Clear the error codes at all stations using
NO
WindLDR (see page 29-2).
Turn off the power to the master station, and
turn on the power after a few seconds.
YES
« FC4A M S U
ICRO MART
M8006: Data link communication prohibit flag
M8007: Data link communication initialize flag
END
' M »
SER S ANUAL
29: T
ROUBLESHOOTING
29-15