GE GFK-0804B manual Communications Memory Types and Addresses, Communications Parameters

B

Communications Memory Types and Addresses

I/O Memory Addresses

Type

Code

Max

Address Range (hex)

DiscreteInput	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)

AnalogInput

AnalogOutput

InternalRegisters

IR

OR

R

256

512

0000 ± 01FE *

0200 ± 03FE *

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

510

511

512

Function

Protocol

StationAddress

Baud rate

Description

0 = Micro PLC (default)

1 = RTU

1 (default) to 247

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
GFK±0804B	Appendix B Micro PLC Protocol		B-3