Mitsubishi L26CPU-BT, User Manual

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