When Operation Of The Master Station Is Faulty - Mitsubishi LJ61BT11 User Manual

15.2.4 When operation of the master station is faulty

Description of problem
G1-1
Unable to stop/restart
the data link
G1-2
Faulty stations cannot
G2-1
be detected.
Faulty station occurs
at certain transmission G3-1
speeds.
When multiple remote
stations are powered
off at 156 kbps, the "L G4-1
RUN" LED goes off
temporarily.
15 - 18
(1) Problems on abnormal operation of the master station
Check item
Is the data link stop (SB0002)
turned on?
Data link stop
Does any error occur?
Is the data link restart (SB0000)
turned on?
Does any error occur?
Data link restart
Is the corresponding station
disconnected?
Is the station set to the Is the station set to the error invalid
error invalid station? station?
Are not station Are not station numbers
numbers overlapping? overlapping?
Can faulty stations be
specified at the
communication status Can faulty stations be specified at
of other stations the communication status of other
(SW0080 to SW0083)? stations (SW0080 to SW0083)?
Can the Can the communication be made
communication be normally at slow transmission
made normally at slow speeds, such as 156 kbps?
transmission speeds,
such as 156 kbps?
Retry count setting Retry count setting
Check contents
Check the program.
Check the automatic refresh
parameter.
Check the data link stop result
(SW0045).
Check the program.
Check the automatic refresh
parameter.
Check the data link restart result
(SW0041).
Check the cable status visually or
by the loop test of GX Works2.
Check the parameter. (for local
stations)
Check the operation status of the
programmable controller CPU at
the corresponding station.
Check the error invalid station
status (SW0078 to SW007B).
Check the temporary error invalid
station status (SW007C to
SW007F).
Check the station number
setting.
Check the switch setting of the
faulty station.
Check if the cables are wired
correctly.
Check if the cable shield is
grounded.
Check if the terminating resistor
is connected to both terminals in
the CC-Link system.
Check the number of the retry
count setting.
15 TROUBLESHOOTING
Check procedure
Set the SB area properly.
Turn on the data link stop
(SB0002).
Take corrective actions according
to the error code.
Set the SB area properly.
Turn on the data link restart
(SB0000).
Take corrective actions according
to the error code.
Review the cable and setting of
the corresponding station and,
startup properly.
Release the error invalid station
setting.
Release the temporary error
invalid station setting.
Set the station number properly.
Configure the transmission
speed setting according to the
master station.
Wire the cable properly.
Ground the shield.
Connect the terminating resistor
to the both terminals in the CC-
Link system.
Increase the transmission speed.
Reduce the retry count.
Corrective action
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