Mitsubishi Electric Q01UCPU User Manual page 427

Remark
For details of SM776, refer to the following.
QCPU User's Manual (Hardware Design, Maintenance and Inspection)
(6) Usage of the local device when an interrupt/fixed scan execution type program
is executed
When the local device is used for an interrupt/fixed scan execution type program, turn on SM777 (Enable/disable
local device in interrupt program). The programs will not function properly if SM777 is turned off.
*1 The index register set as the local device uses the local device area for the program executed before the interrupt/fixed
scan execution type program, regardless of the on/off status of SM777.
Operation example when SM777 is turned on with the following setting
Ex.
Program name
A
B
C
X
A
Execution program
For B
Local device
(1) Uses the program X local device.
(2) When an interrupt/fixed scan execution type program is executed during the END processing, the local device for
Program C, which was executed before the END processing, is read out and saved. Thus, the END processing time
increases by the time required for the read and save.
Execution type
Scan
Scan
Scan
Fixed scan
C
B
X
For B
For C
For X
(1)
CHAPTER 6 CONVENIENT USAGE OF DEVICES
Local device
Not used
A
END B
X
For B
For C
For X
(1)(2)
Used
Used
Used
C
END
X
For C
For X
(1)
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