Determine The Control Items - Mitsubishi Electric G-50A Technical Manual

11.2.2 Determine the control items.

After you determine the equipment to be connected, define the control items for each equipment.
For instance, whether you want to operate the instrument (ON and OFF) and monitor it, including error
monitoring, or just watch for failure (malfunction). For ON and OFF, status output signal from the instrument
changing the icon status (color) is the basic
Application example 1: ON/OFF operation, status monitoring, and error monitoring
(Basic example)
If the status is OFF, operate
and send the ON signal from
the system instrument. The
status will change to ON.
The error signal from the
system instrument will turn
this to the error status display.
*When the system instrument does not provide the output of operation status, connect to the input of operation status by installing a self-
holding circuit.
Application example 3: Error monitoring only
ON/OFF output signal terminal
will have no connection.
Status signal input terminal
will have no connection.
Error signal from instrument
will change it to error status
display.
1
We recommend that you connect the status signal from the instrument.
If the status signal is not connected (judgment only from the operation), there might be a discrepancy between the instrument operation status
and the icons on TG-2000A display.
1
mechanism.
PLC DO board (QY40P)
ON
OFF
Operation
PLC DI board (QX40)
Operation status
Error status
Monitoring
PLC DO board (QY40P)
Not in use
Not in use
PLC DI board (QX40)
Not in use
Error status
Monitoring
1P
1P
System
instrument
1P
1P
System
instrument
1P
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