Mitsubishi Electric GT15, Connection Manual

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4. HOW TO MONITOR REDUNTANT SYSTEM
4.10 Switch the Monitor Target to the Control System Using the Script Function
4.
On the screen 1, set the switch for writing the station No. 1 to the station number switching device.
After the GOT is started up, the station number switching device value of the GOT is "0".
For Ethernet connection, the monitor becomes abnormal when the station number switching device value is "0".
Therefore, set the switch for writing the station number to the station number switching device and the switch for
shifting to the monitor screen on the screen 1.
To make this setting, select [Object]
[Switch] [Switch].
The following shows an example of setting GD100=257 (0101H: Network No. 1, Station No. 1) and base screen=2
to one switch.(Base screen 2 is the actually monitoring screen)
5.
Validate the station number switching function.
On the Basic tab screen specified by selecting [Screen]
[Property], select the item [Switch Station No.] to
validate the station number changing function.
Make this setting for each monitor screen.
However, do not make this setting on the screen 1 created in the item
above.
Check here.