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Published 20 hours ago • verified publisher icon st-one-io

Reading a value from a matrix (bidimensional array) of STRING_8 cause the write of truncated string on plc

Open bombjackit opened this issue 2 years ago • 2 comments

Describe the bug

In Eth IP In, reading 2 tags of type STRING_8 in a matrix (10,2), x in the example belowe, cause the rewrite of the smaller string in the plc.

For example, I read x[0,1] (value "AABBCC") and x[0,0] (value "DDEEFFGG") : at first read of x[0,0] assume the value "DDEEFF" (it was write on plc), I have noted that has same lenght of x[0,1].

Expected behavior

Eth IP In must not write data to plc in any case

Environment

  • Version of this node: node-red-contrib-cip-st-ethernet-ip 2.0.0-beta.3
  • Node-RED version: 2.2.2
  • PLC Part Number: 1756-L83ES
  • OS: Windows 10 professional 21H2

bombjackit avatar Sep 06 '23 11:09 bombjackit

Going deeper on this issue, I discovered that if I read tags of type STRING_8 I had the same problem (not only inside an array but single tag) : maybe there is something correlate to the order of inserted tags inside the configuration (like #41)

bombjackit avatar Sep 07 '23 11:09 bombjackit

Issue reposted in the right place : https://github.com/SerafinTech/node-red-contrib-cip-st-ethernet-ip/issues/2

bombjackit avatar Jan 30 '24 07:01 bombjackit