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MELSEC-Q
4 HARDWARE SPECIFICATION OF THE CPU MODULE
4.4 Latch Clear Operation
To perform latch clear, operate the RESET/L.CLR switch in the following procedure.
1) RUN/STOP switch : STOP
2) RESET/L.CLR switch : Move the switch to L.CLR several times until the
USER LED flickers.
"USER" LED: Flicker Ready for latch clear.
3) RESET/L.CLR switch : Move the switch to L.CLR once more.
"USER" LED: OFF Latch clear complete.
POINTS
(1) The ineffective range for latch clear can be set for each device by the device
setting parameter.
(2) In addition to the way of using the RESET/L.CLR switch for latch clear, remote
latch clear may be performed from GX Developer.
For details of the remote latch clear operation using GX Developer, refer to the
High Performance model QCPU (Q mode) User's Manual (Function
Explanation, Program Fundamentals).
4.5 Executing Automatic Write to Standard ROM.
(1) Order of execution for automatic write to standard ROM
Automatic write to the standard ROM is carried out with the following procedures.
(a) Operation with GX Developer (setting automatic write to standard ROM)
1) Check the
"
Auto Download all Data from Memory card to Standard
ROM
"
item in the PLC parameter boot file setting.
Set the parameter and program to be booted at the "Boot file setting"
section.
(Set the "Transfer from" to "Standard ROM".)
Set the "Transfer from"
to "Standard ROM".
Check "Auto Download all
Data from Memory card to
Standard ROM ".
2) Store the set parameters and programs to be booted in the memory
card.