Filter
Top Products
B
B-3GFK–0804B Appendix B Micro PLC Protocol
Communications Memory Types and Addresses
I/O Memory Addresses
Type Code Max Address Range (hex)
Discrete Input I 256 0000 – 00FF
Discrete Output O 256 0100 – 01FF
Forced Discrete Input
FI
256 0200 – 02FF
Forced Discrete Output
FO
256 0300 – 03FF
Internal Coil
C
1024 0400 – 07FF
Registers
(includes the next two items)
Analog Input
Analog Output
IR
OR
256 0000 – 01FE *
0200 – 03FE *
Internal Registers
R 512
0400 – 07FE *
* Byte address with Least Significant Bit always 0.
Special Registers
Registers 501 to 512 are reserved. Registers 510 to 512 are used for communications setup.
Register Function Description
510
Protocol 0 = Micro PLC (default)
1 = RTU
511
Station Address 1 (default) to 247
512
Baud rate 0 = 300
1 = 600
2 = 1200
3 = 2400
4 = 4800
5 = 9600
Communications Parameters
Baud Rate 9600 (default)
Data Bits 8
Stop Bit 1
Parity None