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8 PROGRAMMING
MELSEC-QnA
8
8. PROGRAMMING
8.1 Precautions When Programming
Precautions when creating programs are described below:
(1) Create a read program from the remote input RX (address E0
H to 15FH) after data
link is started.
Also, create a write program to the remote output RY (address 160
H to 1DFH) at the
last of the entire program.
Parameter setting
Data link startup
Read from the remote input (RX)
Write to the remote output (RY)
(2) In a program, reading received data and writing transmission data should be
performed after the host station becomes the data link status (Xn1 is on).
MCR
X0 XF X1
Communication program
Module error Module ready Host data link status
MC
N0 M0
N0