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5.11
Other Devices
5.11.1
SFC block device (BL)
The SFC block is used to check that the specified block in the SFC program is activated.
MELSEC-Q/L/QnA Programming Manual (SFC)
5.11.2
I/O No. specification device (U)
The I/O No. specification device is used to specify I/O numbers in the intelligent function module dedicated
instructions. The following shows how to specify the device.
For details on the intelligent function module dedicated instructions, refer to the following.
Manual for the intelligent function module used
5.11.3
Macro instruction argument device (VD)
The macro instruction argument device (VD) is used with ladders registered as macros. When a VD setting is
specified, the value is converted to the specified device when the macro instruction is executed. With the macro
instruction argument device, VD0 to VD9 can be used in one macro registration ladder.
Among the devices used in the ladders registered as macros, specify a device used for VD. When using macro
instructions in the program, specify devices that correspond to the macro instruction argument devices used in the
macro registration ladders in ascending order.
Un
GP.READ
S1 S2 S3 D
Instruction name
I/O No. specification instruction
I/O No. specification device
(n: I/O No.)
Passing to VD2
VD0
MOV
VD2
VD0
>
VD1
D0
M.MAX
D1 R0
Passing to VD1
Passing to VD0
VD1
MOV
VD2
VD0
< =
VD1
Command with the name of
the ladder registered as a macro
Program that actually runs in the CPU module
Program
Ladder registered as a macro
(registration name: MAX)
D0
MOV
R0
D0
>
D1
D1
MOV
R0
D0
< =
D1
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