Special Relays, Special Registers

 

 

Table3.4 Special Relay Application List

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Item

Special

 

 

 

 

 

Application/Description

Relay

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(1)This relay turns on for one scan when the built-in PLC function

 

 

switches from STOP to RUN.

 

 

 

Sequence 0 END/0 END/0 END/0 END/0

 

 

 

program

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Initial

 

 

 

 

 

 

 

1 scan

 

 

 

 

 

 

 

 

ON

processing

M9038

 

 

 

 

 

M9038

 

 

OFF

 

 

 

flag

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Switching from STOP to RUN

(1 scan ON)

 

 

 

 

 

 

 

 

 

 

(2)Using M9038, you can create a sequence program to be

 

 

executed only once without using the PLS instruction at

 

 

switching from STOP to RUN.

 

 

 

M9038

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Initial processing program

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Normal OFF

M9037

This relay remains off while power is on.

flag

Can be used to temporarily disable execution for debugging, etc.

 

 

 

This relay is on while power is on.

 

 

Can be used to create a program to be executed only once after

Normally ON

 

power-on.

 

 

 

 

 

 

M9036

 

 

 

 

 

 

 

 

 

 

 

 

flag

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This relay turns on at the second scan of the sequence program

 

 

when SQ-SD are shorted.

 

 

Sequence 0 END/0

RUN flag

M9039

program

 

 

ON

 

 

 

M9039

 

 

 

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

RUN

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Mitsubishi Electronics 700 Series, FR-A700 specifications Special Application/Description Relay