search

plcpeople / nodeS7

Node.JS library for communication to Siemens S7 PLCs
MIT License
358 stars 121 forks source link

not able to read or write from PLC s7-1200 #72

Closed ziborg99a closed 5 years ago

ziborg99a commented 5 years ago

I need help with read/write on PLC s7-1200. I remember having same issues on NodeRed some time ago. Is my PLC is faulty ?? Here is a log.

814827,224150445] Initiate Called - Connecting to PLC with address and paramete rs: [814827,229104172] { port: 102, host: '192.168.0.3', rack: 0, slot: 1 } [814827,233475175] Connection cleanup is happening [814827,237964775 192.168.0.3 S1] Attempting to connect to host... [814827,381915361 192.168.0.3 S1] TCP Connection Established to 192.168.0.3 on p ort 102 [814827,382169661 192.168.0.3 S1] Will attempt ISO-on-TCP connection [814827,383903580 192.168.0.3 S1] Using rack [0] and slot [1] [814827,388375504 192.168.0.3 S1] ISO-on-TCP Connection Confirm Packet Received [814827,437803870 192.168.0.3 S1] Received PDU Response - Proceeding with PDU 24 0 and 3 max parallel connections. [814827,438195584] Translation OK [814827,439564587 192.168.0.3 S1] Adding TEST1 [814827,450946528] PDU type (byte 8) was returned as 2 where the response PDU of 3 was expected. [814827,451163196] Maybe you are requesting more than 240 bytes of data in a pac ket? [814827,451279513] <Buffer 03 00 00 13 02 f0 80 32 02 00 00 00 02 00 00 00 00 81 04> [814827,451825746] ConnectionReset is happening [814828,949983208 192.168.0.3 S1] READ TIMEOUT on sequence number 2 [814828,951408659] Processing an undefined packet, likely due to timeout error [814828,951912128] Timeout error - zero length packet [814828,952043269 192.168.0.3 S1] Received a ZERO RESPONSE Processing Read Packe t due to unrecoverable packet error SOMETHING WENT WRONG READING VALUES!!!! { TEST1: 'BAD 255' } [814828,955403913] ResetNOW is happening [814828,971086153] We Caught a read/write error ECONNRESET - will DISCONNECT and attempt to reconnect. [814828,971333612] ConnectionReset is happening [814828,971749843] ConnectionReset is happening [814830,472651584] ResetNOW is happening [814830,472985139] Clearing an earlier scheduled reset

gfcittolin commented 5 years ago

It looks like the PLC didn't like what you requested to it (the 81 04 in the end means "Context is not supported"). Make sure that:

ziborg99a commented 5 years ago

It works. !!! Many thanks for your help. Tested in Node-Red also with success. Actually I was straggling to find this "Enable PUT/GET Access" option in TIA portal, I had to fully open each tab in hardware config. It was in the very bottom of one of them. :-(

gfcittolin commented 5 years ago

Yes, this is a tricky one :) Nice it has worked for you!