Yokogawa Data Acquisition with PID Control CX2000 - Manual (Page 127)

5-17
IM 04L31A01-17E
5
Ladder Communication Protocol
• Write processing: If M602 is set, write the CH1 data to communication register C1.
M602 X27 Y27
627 MOVP H5 D0
MOVP H102 D1
MOVP H1 D2
MOVP D104 D4
Tx flag 2 Tx end Tx request
D register
First No.
D register
First No.
CPU address
Num. of Tx data
Read/write
Read/write
Specify CH1 Num. of data
to be read/
write data
Num. of data
to be read/
write data
MOVP H10 D3
SWAPP D2
SWAPP D3
SWAPP D4
MOVP H0A0D D5
Num. of Tx data
Terminator
TOP H2 H800 D0 K6
SET Y27
Tx request
Tx request
Rx processing of response received from the CX
X27
822 RST Y27
Tx end
X2A
840 FROMP H2 H0A00 D130 K1
FROMP H2 H0A01 D131 K0Z0
MOVP H100 Z0
Read
request
flag
Rx read
end
Data size
CJ P124
Y28
= K2 CO
Interval
counter
5.5 Communication Program for MELSEC