Bradley Smoker PLC-5 user manual Discrete Data and Block-Transfer Status

Communicating with a PLC-5 Adapter Channel 7-7

Discrete Data and Block-Transfer Status .

Supervisory Processor in Scanner Mode

PLC-5 Processor Channel in Adapter Mode

Discrete Transfer

Configuration Files

a write outputs

b read inputs

Housekeeping

Update I/O image

Remote I/O Buffer

I/O Image

Table

data from scanner’s output image table sent to the input source file

data from output source file sent to scanner’s input image table

Data Exchange

Remote I/O		Housekeeping		a
Buffer
				b
	Update
	I/O image
				read inputs
			Logic
			Scan

a b

Remote I/O Scan

Program Scan

Scanner’s Output Image Table	Adapter Channel’s Input Destination File
	Integer File

		Word		17	14	13	10	07	04	03	00
Reserved for status			0
			1
Supervisory Processor			2
			3
PLC-2	0X0-0X7
PLC-3	OXX0-OXX7		4				Output File
PLC-5	O:X0-O:X7		5
			6
			7
					Scanner’s Input Image Table

Reserved for status

15 12 11 08 07 04 03 00

Input File

Adapter Channel’s Output Source File

Integer File

		Word		17	14	13	10	07	04	03	00		15	12	11	08	07	04	03	00
Reserved for status			0									Reserved for status
			1
Supervisory Processor			2
			3
PLC-2	1X0-1X7
PLC-3	IXX0-IXX7		4				Input	File								Output File
PLC-5	I:X0-I:X7		5
			6
			7
			Two, four, six, or eight words of data can be transferred between the scanner and the adapter channel.
			The number of words is determined by the rack size specified on the Adapter Channel Configuration screen.

Publication 1785-UM012D-EN-P - July 2005