Mitsubishi A1SJ61BT11 User Manual page 238

13 TROUBLESHOOTING
Trouble description
Cannot turn on/off remote output (RY)
from a remote device station.
Unable to get the remote register
(RWr) data from a remote device
station.
Unable to write data onto the remote
register (RWw) at a remote device
station.
Unable to communicate from the
master station (remote output RY) to
the local station (remote input RX).
Unable to communicate from the local
station (remote output RY) to the
master station (remote input RX).
Details to be checked
Is the remote device station performing data
link?
Is the refresh specification (Yn0) turned on
at the master station?
Is data written to the correct address of
remote output RY (buffer memory)?
Is the station incorrectly set as reserved?
Did the station number overlap?
Is the remote device station performing data
link?
Is data read from the correct address of the
remote register RWr (buffer memory)?
Is the station incorrectly set as reserved?
Did the station number overlap?
Is the remote device station performing data
link?
Is data written to the correct address of
remote register RWw (buffer memory)?
Is the station incorrectly set as reserved?
Did the station number overlap?
Is the corresponding local station performing
data link?
Is the refresh specification (Yn0) at the
master station turned on?
Is data written to the correct address of the
remote output RY (buffer memory) at the
master station?
Is data read from the correct address of the
remote input RX (buffer memory) at the local
station?
Is the station incorrectly set as reserved?
Did the station number overlap?
Is the corresponding local station performing
data link?
Is the refresh specification (Yn0) at the local
station turned on?
Is data written to the correct address of
remote output RY (buffer memory) at the
local station?
Is data read from the correct address of the
remote input RX (buffer memory) at the
master station?
Is the station incorrectly set as reserved?
Did the station number overlap?
13 - 2
Confirmation action
Verify using the following means:
LED display of the module
The master station's communications status with
other stations (SW0080 to SW0083)
Verify the sequence program.
Verify the sequence program.
Verify parameters.
Verify the station number.
Verify using the following means:
LED display of the module
The master station's communications status with
other stations (SW0080 to SW0083)
Verify the sequence program.
Verify the parameters.
Verify the station number.
Verify using the following means:
LED display of the module
The master station's communications status with
other stations (SW0080 to SW0083)
Verify the sequence program.
Verify the parameters.
Verify the station number.
Check the LED indication of the corresponding local
station.
Check the communication status of the master
station with other stations (SW0080 to SW0083).
Verify the sequence program.
Verify the sequence program.
Verify the sequence program.
Verify the parameters.
Verify the station number.
Check the LED indication of the corresponding local
station.
Check the communication status of the master
station with other stations (SW0080 to SW0083).
Verify the sequence program.
Verify the sequence program.
Verify the sequence program.
Verify the parameters.
Verify the station number.
MELSEC-A