Mitsubishi QCPU (Q Mode) User Manual

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MELSEC-Q
10 DEVICES
1) Switching over local devices by setting ON/OFF for a special relay
(SM776)
SM776
OFF
Executes calculation by the local devices that are used by the file
where the sub-routine program was called
ON
Executes calculation by the local devices that are used by the file
where the sub-routine program is stored.
[Operation at "SM776 : OFF"]
CALL P100
X0
INCP D0
X2
END
Local devices used by
the file name: ABC
File name: ABC
Local devices used by
the file name: DEF
File name: DEF
(Standby program)
RET
P100
Sub-routine
program
Read/write of the
local devices
Execution of the
sub-routine program
[Operation at "SM776 : ON"]
CALL
P100
X0
INCP D0
X2
END
Local devices used by
the file name: ABC
File name: ABC
Local devices used by
the file name: DEF
File name: DEF
(Standby program)
RET
P100
Sub-routine
program
Read/write of the
local devices
Execution of the
sub-routine program
2) Cautions
• If SM776 is ON, the local device data is read when the sub-routine
program is called and the local device data is saved after the execution of
the RET instruction. Accordingly, scan time is elongated by the time as
when a sub-routine program is executed once with the setting of "SM776:
ON". (See Section 10.13.1)
• ON/OFF setting of SM776 is enabled in CPU modules.
Setting in file units is not enabled.
• If the ON/OFF setting of SM776 is changed while a sequence program is
executed, the control is made according to the information after change.
REMARK
For details on SM776, see Appendix 1.

Mitsubishi QCPU (Q Mode) Specifications

General

Brand	Mitsubishi
Model	QCPU (Q Mode)
Category	Controller
Language	English