Prior to Sequence Program Creation

1.5.3Sequence program execution key

The sequence program execution key (STOP/RUN) of the PLC is switched by turning off/on the SQ signal.

POINT

For the terminal used for SQ signal input, set "50" in any of Pr.178 to Pr. 189 to assign the function.

SQ-SD must be shorted to execute the built-in PLC function.

CAUTION

If the SQ signal is not turned on, the start signal of the inverter is designed to become valid by the factory setting of Pr.415 Inverter operation lock mode setting.

Open (STOP) the SQ signal-SD terminals when writing a sequence program, for example.

When executing the sequence program, short (RUN) the SQ signal-SD terminals. Remote run/stop of the built-in PLC function can be executed in any of the following methods:

• Setting using the built-in PLC function parameter (contact)

• Using GX Developer

• Via CC-Link communication (refer to page 49)

REMARKS

The validity limit of the SQ signal can be controlled using Pr.415 Inverter operation lock mode setting. (Refer to page 43.)

CAUTION

The outputs (Y) are cleared by turning the SQ signal off (STOP) after sequence program

 

execution (SQ signal on).

 

The other devices retain the device data prior to STOP. When you want to clear the

 

remaining device data, power off or reset (short RES-SD for 0.1s, then open) the

 

inverter.

1

 

PLC FUNCTION

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Mitsubishi Electronics FR-A700, 700 Series specifications Sequence program execution key