Bradley Smoker user manual Configuring Communication to a PLC-5 Adapter Channel

7-2Communicating with a PLC-5 Adapter Channel

Configuring Communication to a PLC-5 Adapter Channel

Because a PLC-5 controller adapter channel is more intelligent than a

1771-ASB module, data communication and configuration tasks are handled differently for adapter channels.

The supervisory controller or scanner channel and the adapter-mode controller channel automatically transfer discrete data and status between themselves via the supervisory controller’s remote I/O scan.

Supervisory Processor in Scanner Mode

a
write				Remote I/O
outputs
				Buffer
b
read
inputs	Housekeeping
			Update
				I/O Image
		I/O image		Table

Discrete

Data and

Status Bit

Exchange

PLC-5 Processor Channel in Adapter Mode

Discrete Transfer

Configuration Files

	Data Exchange
			Housekeeping		a
Remote I/O
					b
Buffer		Update
		I/O image
					read inputs
				Logic
I/O Image
				Scan
Table

a b	a b
Remote I/O Scan	Program Scan

During each remote I/O scan, the supervisory processor transfers 2, 4, 6, or 8 words*depending on whether the adapter-mode processor is configured as a 1/4, 1/2, 3/4, or full rack.

The adapter-mode processor transfers 2, 4, 6, or 8 words*depending on whether it is configured as a 1/4, 1/2, 3/4, or full rack.

Discrete data and block-transfer status bits are transferred between a remote I/O scanner’s I/O image table and an adapter channel via the adapter channel’s discrete transfer configuration files, which you define on the adapter channel configuration screen.

For the Scanner Channel to Communicate with a PLC-5 Controller Adapter	For More Information, See
Channel, Do the Following
1.Define the communication rate, its address, and rack size (number of words to transfer). page 7-3
2.Define the discrete transfer configuration files, which are the files from which the	page 7-5
adapter controller channel gets the data sent by the supervisory controller and puts data
into for the supervisory controller.
3.If you plan to block-transfer data to the adapter channel, define the block-transfer files	page 7-10
and configure the block-transfers.
4.Connect the remote I/O cable.	your controller installation
	instructions

Publication 1785-UM012D-EN-P - July 2005