Switch The Monitor Target To The Control System Using The Script Function; Method For Using The Station Number Switching Function; Switch The Monitor Target To The Control System Using The Script; Function - Mitsubishi Electric GT1685 Connection Manual

4.10 Switch the Monitor Target to the Control System
Using the Script Function
The following explains how to create a script screen, to be used for the MELSECNET/H or MELSECNET/10
connection (network system), or Ethernet connection, that automatically changes the monitoring target (Station No.)
at the occurrence of system switching even if the Q redundant setting is not made.
The script executes the station number switching function or screen switching function.
The following shows the advantages and disadvantages of the station number switching function and screen
switching function.

Function

Station number switching
function
Screen switching function
The following explains how to use each function.

4.10.1 Method for using the station number switching function

• As a feature of this function, monitor screens for Station No. 1 (control system) and Station No. 2 (standby system)
can be created on one screen.
• If the system switching occurs, the GOT can change the monitoring target to the control system PLC CPU on the
same monitor screen.
• To achieve this, the script of the GOT monitors the special relay SM1515 (Control system identification flag) of the
PLC CPU and stores the station number of the latest control system into the station number switching device.
• Restrictions: Some objects do not allow the station number to be switched.
GT Designer3 Version

Setting method (For MELSECNET/H connection, MELSECNET/10 connection)
System configuration example 1: MELSECNET/H connection, MELSECNET/10 connection
Station
No. 3
Control system
(System A)
MELSECNET/H network module of control system
MELSECNET/H network module of standby system
GOT connected to MELSECNET/H network or MELSECNET/10
network

4.10 Switch the Monitor Target to the Control System Using the Script Function

Advantage
The monitor screens for Station No. 1 (control system)
and Station No. 2 (standby system) can be created on one
screen.
All objects can be used since monitor screens are created
for each station number.
Screen Design Manual
MELSECNET/H
(MELSECNET/H mode or MELSECNET/10 mode)
Network No. 1
GOT
Q25PRH
QJ71
CPU
BR11
Station No. 1
Connected module
4. HOW TO MONITOR REDUNTANT SYSTEM
Disadvantage
Some objects do not allow the station number to be
switched.
Monitor screens must be created separately for Station
No. 1 (control system) and Station No. 2 (standby
system).
Standby system
Q25PRH
QJ71
(System B)
CPU BR11
Station No. 2
Network No.
1
1
2
3
4
5
6
7
Station No.
1
2
3
8
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