Mitsubishi Q00JCPU User Manual page 169

3
SEQUENCE PROGRAM CONFIGURATION AND
EXECUTION CONDITIONS
(2) Device latch specification
Basic Universal
UD
Note3.38 Note3.38
Basic
Universal
UD
Note3.38 Note3.38
Basic Universal
UD
Note3.38 Note3.38
Remark
Note36
Basic Universal
The Basic model QCPU and Universal model QCPU cannot perform latch clear by switch
UD
operation.
Note3.38
Note3.38
Note37
Make the latch specification (latch range setting) for each device in the device setting
of the PLC parameter dialog box of GX Developer.(
(a) Latch range setting
The latch range can be set by the following 2 methods using GX Developer.
1) Latch clear operation enable (Latch (1) first/last)
Set the latch range that can be cleared by the latch clear operation performed
by the RESET/L.CLR switch
2) Latch clear operation disable (Latch (2) first/last)
Set the latch range that cannot be cleared by the latch clear operation
performed by the RESET/L.CLR switch
(b) Clearing device data set to latch clear operation enable
• Latch clear operation by the RESET/L.CLR switch
• Clear operation by the remote latch clear(
Developer
(c) Clearing device data set to latch clear operation disable
The device data set to latch clear operation disable can be cleared only by the
instruction or the clear operation using GX Developer.
1) Clearing by instruction
Reset the device data using the RST instruction or transfer K0 using the MOV/
FMOV instruction.
QCPU (Q Mode)/QnACPU Programming Manual (Common Instructions)
2) Clearing by GX Developer
Choose [Online]
(including latch).
POINT
1. When the start mode of the Redundant CPU is the hot-start mode, the data
outside the latch range are also held.
(Except some devices such as the step relay and index register.).
2. For the Universal model QCPU, the scan time is prolonged when the device is
latched. When latching a device, consider the prolonging scan time.
( Section 10.1.2 (11) )
Refer to the following manual for the operation of GX Developer.
GX Developer Operating Manual
Note3.38
or the remote latch
Note3.38
[Clear PLC memory] and execute device memory all clear
3.7 Data Clear Processing
Section 6.3(5))
clear.Note36
or the remote latch clear.
Note3.38
Note37
Section 6.6.4)from GX
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