Connecting To Plc From Other Companies - Omron NT20S-ST121B-EV3 User Manual

Communications with PLC by Direct Connection
Functions of the PT Status Control Area (PLC to NT20)
Functions of the PT Status Notify Area (NT20 to PLC)
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Connecting to PLC from Other Companies

Connectable PLCs
NT Series Support
Software
12
The "PT status control area" is used to control the NT20 status. When data is
written to this area in the PLC, the NT20 reads the contents and operates
according to the contents.
Example of the PT Status Control Area Application
When data is written to the PT status control area, the NT20 will operate as
given below.
Screen 3
display
Continuous
buzzer sound
Numeral memory table entry 50
Numeral memory table entry 7
Copy
The "PT status notify area" is used to notify the PLC of changes of the NT20
status. When a change is made in the NT20 status, the change is written to
this area in the PLC. By reading the data from the area, the NT20 status can
be checked.
Example of the PT Status Notify Area Application
When a change is made in the NT20 status, such change will be indicated in
the PT status notify area as described below.
NT20
Numeral memory table entry 13
12345678
12345678
The NT20 can be connected to PLCs from other companies using the com-
puter link method.
The NT20 can be connected to the following PLCs.
• Mitsubishi A-series Sequencers (via Computer Link Unit)
• Mitsubishi FX-series Sequencers
Refer to the PLC Connection Manual (Cat. No. V042) for connection methods.
The following Support Software is required when connecting PLCs from other
companies.
Support Software: NT-ZJCAT1-EV4(S) (NT Series Support Software for
Windows, Version 4.@)
NT20 PLC
PT status control area
PLC
PT status notify area
Currently display screen
Updated memory table entry
PT status
Allocated word (numeral table entry 13)
12345678 Start
Start + 1
Section 1-4
Screen switch setting
Memory table entry
Copy setting
PT status control bits