Allen-Bradley 1785-KE, User Manual, Page: 49 / 93

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5–4
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This example reads the 4 words (8 bytes) of data that you sent with the
PLC-2 Normal Unprotected Write command in the previous example. The
following paragraphs show line monitor examples for this command:
1. Computer sends command to the 1785-KE:
DLE STX DST SRC CMD STS TNS TNS ADR ADR SIZE DLE ETX BCC
10 02 29 20 01 00 45 01 28 00 08 10 03 40
2. 1785-KE responds to computer:
D
LE ACK
10 06
3. 1785-KE sends command to the PLC-5:
The 1785-KE sends the command onto Data Highway Plus and the PLC-5 node at address 51 (octal).
4. PLC-5 sends the reply to the 1785-KE:
The PLC-5 receives the command, executes the command, formats a reply, and sends the reply back to the 1785-KE.
5. 1785-KE sends the PLC-5 reply back to the computer:
DLE STX DST SRC CMD STS TNS TNS--------------DATA------------- DLE ETX BCC
10 02 20 29 41 00 45 01 22 11 44 33 66 55 88 77 10 03 CC
6. Computer responds to the 1785-KE.
DLE ACK
10 06