Mitsubishi Electric MELSEC-L LD75P User Manual page 239

(5) Communication with LD75
There are two methods for communication with LD75 using the program: a method using an "intelligent function
device" and a method using a FROM/TO instruction.
In the program in this chapter and subsequent, the program example using the "intelligent function device" is
shown without using an FROM/TO instruction for communication with LD75.
When using the FROM/TO instruction for communication with LD75, change the circuit incorporating the
"intelligent function device" as follows.
• When the circuit uses the "intelligent function device" on the destination (D) side of a MOV instruction,
change the instruction to a TO instruction.
• When the circuit uses the "intelligent function device" on the source (S) side and the destination (D) side of a
MOV instruction, change the instruction to a FROM instruction and a TO instruction.
• When the circuit uses the "intelligent function device" for a comparison instruction, change the instruction to
a FROM instruction and a comparison instruction.
• When the circuit uses the "intelligent function device" for a WAND instruction, change the instruction to a
FROM instruction and a WAND instruction.
CHAPTER 6 PROGRAM USED FOR POSITIONING CONTROL
Designated Designated
value value
at U0 at G1505
Data read out
Intelligent function device
Number of
write data (1)
Set the same device.
Data read out
237
6