Bradley Smoker PLC-5 Monitoring the Status of the Adapter Channel, Status bits sent to scanner

Communicating with a PLC-5 Adapter Channel 7-17

Do not program a block-transfer to group 0, module 1 since this area of the discrete transfer configuration file is used for communication status exchanges between the supervisory controller and the adapter-mode controller channel. For example:

Scanner’s Input Image Table

Status bits sent to scanner

Word		17	14	13	10	07	04	03	00
	0

Scanner’s Output Image Table

Word		17	14	13	10	07	04	03	00
	0

Adapter Channel’s Output Source File

Example Integer File

15 12 11 08 07 04 03 00

module 1

Adapter Channel’s Input Destination File

Example Integer File

15 12 11 08 07 04 03 00

module 1

Monitoring the Status of the Adapter Channel

The supervisory controller receives status bits from the adapter-mode controller in word 0 of the input image table for the rack that the adapter-mode controller is emulating.

Scanner’s Input Image Table (Octal)

Status bits sent to scanner

Word		17	14	13	10	07	04	03	00
	0

Status bits received from adapter channel

Adapter Channel’s Output Source File

Example Integer File

15 12 11 08 07 04 03 00

Adapter channel status

Publication 1785-UM012D-EN-P - July 2005