9/30/2020 7:32 AM | |
Posts: 4 Rating: (1) |
I have the same error. I have even made a small program just to test. I get DONE and ERROR both as False with Status as 16#7000. The hardware is set half duplex modbus and I have written 4 into the comm_Load_DB howvere the block is processed but does not show DONE or ERROR just code 7001 I have placed the FB modbus_Comm_Load in OB1 as the first instruction with REQ = first scan. Any help here would be fantastic as im pulling my hair out ------------------------------------------------------------------------------------------ |
Last edited by: wrighthm at: 09/30/2020 07:52:52Last edited by: Jen_Moderator at: 09/30/2020 14:05:59New subject after splitting |
|
9/30/2020 1:30 PM | |
Posts: 4 Rating: (1) |
Thankyou for the advice; I have attached the project here. i have checked the slave using Modscan and can read the registers 40013 onwards. I am using a 1515-2PN PLC with a 6ES7 541-1AB00-0AB0 Pt to Pt Comms Card HF attached. The card is wired using pins 4,8 and 11 to A/GND and B on the slave which has a device ID 1. In the hardware setup i have selected Half Duplex RS485 and Freeport/Modbus RTU. I am using TIA Portal 16. Thankyou for your support Attachmentcomms test_20200930_2124.zip (147 Downloads) |
Follow us on