Rockwell Automation 1771-DA,D17716.5.13 U MNL 1771-DA ASCII I/O MODULE - Manual (Page 164)

Troubleshooting
Chapter 7
7Ć5
Table 6.C
Correct Operation Codes
Hex Binary Description
A011 10100000 000 10001
Input buffer empty
Output buffer empty
Read data available
Channel active
8010 10000000 00010000
Input buffer contains data
Output buffer empty
Channel active
Output buffer empty
Read data available
Channel active
Input buffer contains data
A010
E0001
1010000 00010000
E010 11100000 00010000
Output buffer empty
Read data available
Write data acknowledge
Input buffer contains data
Channel active
C011 1100000 00010001
Output buffer empty
Write data acknowledge
Channel active
Output buffer empty
11100000 00000001
Input buffer empty
Output buffer conatins data
Read data available
Write data acknowledge
Channel active