kb:production:s7-communication:connection
Table of Contents
11 Connection
A connection is setup in three steps:
TCP/IP
- Connect to PLC at
<IP ADDRESS>on TCP port102
COTP Connection Request
S7 Comm PDU Negotiation
Header
See S7 Comm.
Request Params
| Byte | Value | Description |
|---|---|---|
| Fixed Part | ||
| [0] | 0xF0 | Parameter: Setup communictation |
| [1] | 0x00 | Reserved |
| [2-3] | 0x00 01 | Max AmQ (parallel jobs with ack) calling |
| [4-5] | 0x00 01 | Max AmQ (parallel jobs with ack) called |
| [6-7] | 0x…… …… | PDU Length (negotiated) |
Response Params
Identical to the request, with Message Type = 0x03 (ACK). Values for AmQs and PDU Length can vary from request.
kb/production/s7-communication/connection.txt · Last modified: 2020/04/09 15:08 by joerg.hampel