Allen-Bradley 1785-KE, User Manual, Page: 51 / 93

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5–6
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This example reads the 4 words (8 bytes) of data that you sent with the
PLC-3 Word Range Write command in the previous example. When you
send a PLC-3 command to a PLC-5, the command can only have a
four-level address. In this example, the address is in logical ASCII form.
The following paragraphs show line monitor examples for this command:
1. Computer sends command to the 1785-KE:
----------------------ADDRESS----------------------
DLE STX DST SRC CMDSTS TNS TNS FNC PO PO TT TT NL $ N 1 0 : 1 5 NL SIZE DLE ETX BCC
10 02 29 20 0F 00 47 01 01 00 00 04 00 00 24 4E 31 30 3A 31 35 00 08 10 03 E0
2. 1785-KE responds to computer:
DLE 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 4F 00 47 01 22 11 44 33 66 55 88 77 10 03 BC
6. Computer responds to the 1785-KE.
OLE ACK
10 06