29: TROUBLESHOOTING
« FC4A MICROSMART USER’S MANUAL » 29-15
Troubleshooting Diagram 8
Turn off the power to the master station, and
turn on the power after a few seconds.
Is the error code
0 at all stations?
Is the
communication cable
connected to the RS485
port correctly?
Call IDEC for assistance.
NO
Make sure of correct wiring (see page 25-2).
END
Turn off M8006 using WindLDR.
Check error codes for the troubled
stations (see page 25-4).
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?
Clear the error codes at all stations using
WindLDR (see page 29-2).
Data link communication is impossible.
NO
YES
YES
YES
NO
M8006: Data link communication prohibit flag
M8007: Data link communication initialize flag
NO
YES
Is data link selected
for port 2 correctly?
NO
YES
YES
NO
Is the PWR LED on?
See Troubleshooting Diagram 1,
“The PWR LED does not go on.”
Is M8006 on at
the master station?
Check port 2 settings using
WindLDR (see pages 25-7 and
25-8).
Select data link for port 2 correctly and down-
load the user program again (see pages 25-7
and 25-8).
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