Mitsubishi MELSEC Q Series Programming Manual page 918

SP.CONTSW
11.1
System Switching Instruction (SP.CONTSW)
SP.CONTSW
SP.CONTSW
Setting
Data
S
D
Function
(1) Switches between the control system and standby system at the END processing of the
scan executed with the SP.CONTSW instruction.
(2) When using the SP.CONTSW instruction for system switching, the "manual switching enable
flag (SM1592)" must have been turned ON (enabled) in advance.
(3) is provided to identify the processing block of the program where system switching
S
occurred when multiple SP.CONTSW instructions are used.
At
S
The
instruction argument (SD6)" of the error common information when the system switching is
normally completed.
When multiple SP.CONTSW instructions are executed during the same scan, the argument
of the SP.CONTSW instruction executed first is stored into the system switching instruction
argument (SD6).
(4) When system switching is normally completed, the
instruction is stored into the "system switching instruction argument (SD1602)" of the new
control system CPU module.
By reading the SD1602 value from the new control system CPU module, which the
SP.CONTSW instruction was used for system switching can be confirmed.
*2 : The
*3 : The new control system CPU module means the CPU module that was switched from the standby system
11-2
Command
: Value other than 0 and used to identify the processing that issued the system switching request (BIN 16 bits)
S
: Error completion device number (bits)
D
Internal Devices
R, ZR
Bit Word
––
*1
, specify a value within the ranges -32768 to -1 and 1 to 32767 (1
value specified for the SP.CONTSW instruction is stored into the "system switching
S
*2
*3
value specified for the SP.CONTSW instruction can be confirmed in the error common information
S
of the PLC diagnostics dialog box on GX Developer.
to the control system by the SP.CONTSW instruction.
High
Basic
performance
SP.CONTSW
J \
U \G
Bit Word
––
––
*1: The bit specification for the word device is available.
value specified for the SP.CONTSW
S
Process
Redundant Universal LCPU
S D
Constants
Zn Other
K, H
––
–– ––
to FFFF ).
H H