
COOLMAY EX3G PLC/HMI All in one Programming manual
42
WR3A originally referred to the analog modules write.
For CoolMay PLC, the WR3A instruction corresponds to Modbus's 06 and 10 functions.
In the instruction,
m1 represents the station number of the slave device to be written, range :1-247.
m2 represents the first address number of the write register in the slave device;
S represents the numbers of registers to be written, ranging:1-32. The data to be written is sequentially
stored in the host S.+1, S.+2.
S=1, the WR3A instruction corresponds to the Modbus 06 function.
S=2-32, the WR3A instruction corresponds to the Modbus 10 function.
S.-1 address value must be set to 0. (=0: serial port 2; =1: serial port 3; =2: CAN)
Program example:
Master program:
Slave program: