Rockwell Automation 1785-Lxxx Enhanced and Ethernet PLC-5 Programmable Controllers - Manual (Page 115)

Publication 1785-UM012D-EN-P - July 2005
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:
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.
Adapter Channel’s Output Source File
Example Integer File
Scanner’s Input Image Table
00 03 04 07 10 13 14 17 00 03 04 07 08 11 12 15 Word
0
Status bits sent to scanner
00 03 04 07 10 13 14 17 00 03 04 07 08 11 12 15 Word
0
Adapter Channel’s Input Destination File
Example Integer File
Scanner’s Output Image Table
x x x
module 1
module 1
Adapter Channel’s Output Source File
Example Integer File
Scanner’s Input Image Table
(Octal)
00 03 04 07 10 13 14 17 00 03 04 07 08 11 12 15 Word
0
Status bits sent to scanner
Adapter channel status Status bits received
from adapter channel