System Variables - Mitsubishi Electric FX Series Training Manual

Programming
The software engineer need only be concerned about the program content, not whether the
branch instructions are correct and obey the rules.
Machines/processes, consisting of standard parts, can have individual POU's written for each
part. The full machine may consist of many POU's.
For each variant of the machine, the supplier can choose to assign to the Task Manager, only
the relevant POU's, for that machine, as only POU's assigned will be transferred to the PLC on
download.
3.2.2

System Variables

The device ranges that GX IEC Developer allocated to system variables can be edited here.
This feature is displayed using the Options command under the Extras menu:
Systen variable ranges for the actual project.
b Word range
D: D devices are used as word system variables.
R: R devices are used as word system variables.
W: W devices are used as word system variables.
From/to: PLC type dependant, as defined in the parameters.
b Timers
Standard (T) – From/to: PLC type dependant, as defined in the parameters.
Retentive (ST) – From/to: PLC type dependant, as defined in the parameters.
b Counters (C)
From/to: PLC type dependant, as defined in the parameters.
Training Manual GX IEC Developer
Software Structure and Definition of Terms
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