32Mt-Lt Built-In Cc-Link/Lt Troubleshooting; Status Of Each Station During Abnormal Operation; Operation At Blowout Of Built-In Power Fuse For Cc-Link/Lt - Mitsubishi FX3UC SERIES User Manual

FX Series Programmable Controllers
3UC
User's Manual - Hardware Edition
12.7 FX

-32MT-LT Built-in CC-Link/LT Troubleshooting

3UC

12.7.1 Status of each station during abnormal operation

The table below shows the status of each station when an abnormal operation has occurred.
Data link status
When an abnormality
has occurred in the
PLC, the PLC is
stopped.
(The data link in the
entire system is
continued.)
When a remote station becomes
abnormal (by data link error, etc.)
(The data link in the entire system is
continued.)
When the power is interrupted in a
remote station
(The data link in the entire system
is continued.)
Holds the status.
Holds the ON/OFF status just before abnormality occurrence.
Continues the operation.
Executes the same operation as that in the normal status even if abnormality has occurred.
Clears.
Turns OFF inputs or outputs when abnormality has occurred.
• When monitoring a remote station and a program error occurs in the PLC, inputs on the monitoring device
may turn ON and OFF repeatedly. When the program error is cleared, inputs will return to their correct
state.

12.7.2 Operation at blowout of built-in power fuse for CC-Link/LT

A dedicated fuse is built into the built-in power supply circuit for CC-Link/LT. The system does not have a
function to detect a blown fuse, but the following abnormality occurs when the fuse is blown.
• Link error in all stations (BFM#29 b1)
• The power is turned OFF in a remote station that normally receives power from the main unit.
When the above abnormalities occur at the same time, the power fuse for CC-Link/LT may be blown out.
Consult a Mitsubishi Electric Distributor.
404
12 Test Operation, Adjustment, Maintenance and Troubleshooting
Built-in master station
Remote input
Program error -
CPU error -
Clears inputs from
a remote station in
the abnormal
status.
Clears inputs from
a remote station
where the power is
interrupted.
12.7 FX3UC-32MT-LT Built-in CC-Link/LT Troubleshooting
Status of each station
Remote
Input
output
Clears.
Continues the
operation.
(Input LED is lit.)
Clears.
Continues the
operation, but
Continues the disables data
operation. transfer to the
master station.
(Input LED is lit.)
Continues the Depends on the
operation. external signal.
Remote station
Output
Clears.
Clears.
Depends on the
DIP switch
status.
Turns OFF all
points.