Monitoring the status of the adapter channel -17, Monitoring the status of the adapter channel – Rockwell Automation 1785-Lxxx Enhanced and Ethernet PLC-5 Programmable Controllers User 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
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