Navigation
About cabel connection - MODBUS RTU communication PLC (224XP) -> Digidrive SK
Created by: Thomas Vlerk at: 3/5/2009 6:52 PM (1 Replies)
Rating 
Thanks 0
2 Entries
| 3/5/2009 6:52 PM | |
|
Posts: 3 Rating:
|
Hi, I have some troubles with MODBUS RTU communication PLC (224XP) -> Digidrive SK. All parameters are normally correctly configured but I have still no responce from slave. I think the serial cable is not right connected. Do I need to use terminator resistors with point to point communication? Is twisted pair wiring really necessary? for the pin connection I used: F-drive (RJ45connection) PLC (D-shell 9pin) ---------- --------- pin2: RXTX (EIA485 +) -----> pin3: RS-485 signal A pin7: RX\TX\ (EIA485 -) ------> pin8: RS-485 signal B ground -------> ground could somebody help me please tnx Thomas Attachmentcommunicatie RS485.pdf (347 Downloads) |
Last edited by: CS Moderator at: 3/6/2009 10:01 PMnew subject after splitting |
|
| 3/6/2009 10:19 PM | |
Joined: 9/1/2005 Last visit: 1/9/2026 Posts: 4114 Rating:
|
closed cause question posted twice. The second thread with the subject MODBUS RTU communication - I think the serial cable is not right connected.is published within the conference SIMATIC S7-200. Best regards CS Moderator |
|
My Forum is the place to personalize your profile, |
|
Follow us on