Recent posts to Modbus-RTU bERRORhttps://forge.codesys.com/forge/talk/CODESYS-V2/thread/5442676316/2020-02-27T23:04:11.528000ZRecent posts to Modbus-RTU bERRORModbus-RTU bERROR2020-02-27T23:04:11.528000Z2020-02-27T23:04:11.528000Zhki75https://forge.codesys.com/u/hki75/https://forge.codesys.com45808b185b71f69dbe3d5678f94f82ad5160bdb1<div class="markdown_content"><p>I take a look at the Wago docs.. just 0-1-2-3 error codes are foreseen..I used same block some months ago with 758 IPC..I used this settings and it was good:</p>
<p>RTUClient(<br/>
EN:=TRUE ,<br/>
bSLAVE_ADDRESS:=104 ,<br/>
bCOM_PORT:=2,<br/>
cbCOM_BAUDRATE:= 3840,<br/>
cpCOM_PARITY:=0 ,<br/>
csCOM_STOPBITS:= 1,<br/>
cbsCOM_BYTESIZE:=8 ,<br/>
cfCOM_FLOW_CONTROL:= 4, (<em> 0=no flow control; 1=XON-XOFF 2=RTS-CTS 3=full duplex ; 4=half duplex </em>)<br/>
tTIME_OUT:= ,<br/>
iBIT_OFFSET:=,<br/>
tWATCHDOG_TIME:= ,<br/>
aDATA:=ModbData ,<br/>
xWATCHDOG_OK=> ,<br/>
bERROR=> );</p>
<p>and call this PRG as fast as possible in a dedicate task(freewheeling) otherwise I get comm very bad and slow.. try this...</p></div>Modbus-RTU bERROR2020-02-27T23:04:09.911000Z2020-02-27T23:04:09.911000ZA.Emmerichhttps://forge.codesys.com/u/a-emmerich/https://forge.codesys.comc4965120baf37fc52488807892f3474658abfe14<div class="markdown_content"><p>Hi All,</p>
<p>I am attempting to communicate between a RedLion touch panel (G308C2) and a Wago 882 via Modbus-RTU.<br/>
The touch panel is the master and the PLC the slave (via a 750-653 Modbus card).</p>
<p>Communications is established using the Wago TerminalSlave.lib library and its TERMINAL_MODBUSSLAVE_RTU function block in CoDesSys.</p>
<p>Now to the question , <br/>
I have established communications but even with the most trivial of applications I receive an error code from the bERROR output, "INVALID: 204" which I cannot identify in documentation or google.</p>
<p>I realise that this a bit obscure but if anyone has any ideas I would appreciate it.</p>
<p>Kind regards,<br/>
Alex.</p></div>