https://forge.codesys.com/forge/talk/CODESYS-V2/thread/c01554beb5/2024-03-13T14:17:46.866000ZRecent posts to J1939.ReceiveWatchdog & J1939.ReceiveParameterGroup2024-03-13T14:17:46.866000Z2024-03-13T14:17:46.866000Zzoronoahttps://forge.codesys.com/u/zoronoa/https://forge.codesys.comddf41d19cccab4a220a7f6b37f05cf27ffa75573

<div class="markdown_content"><p>Hi,</p> <p>I'm trying to monitor a specific PGN which I have it sending a pulse every 500mS</p> <p>Problem: Using the Watchdog for the ECU does not really help me as I have multiple instances with separate PGNs, if a PGN goes ghost, the ECU watchdog won't be flagged as the others will be running.</p> <p>I found the J1939.ReceiveWatchdog &amp; J1939.ReceiveParameterGroup function blocks and they seem like a good solution for my problem, I just can't get them to work</p> <p>from my understanding you just build the J1939.ReceiveParameterGroup once and then connect it's output to the J1939.ReceiveWatchdog, here's my CODE for the setup</p> <p>HEARTBEAT_TIMER(IN:= TRUE, PT:= T#1000MS); //turn-on delay because of initialization race<br/> IF HEARTBEAT_TIMER.Q= TRUE THEN<br/> Glob_Var.DisplayReceive.xExecute:= TRUE;<br/> Glob_Var.DisplayReceive.itfECU:= Valve_X;<br/> Glob_Var.DisplayReceive.dwPGN:= 65511;<br/> Glob_Var.DisplayWatchdog.xEnable:= TRUE;<br/> Glob_Var.DisplayWatchdog.itfParameterGroup:= Glob_Var.DisplayReceive.itfParameterGroup;<br/> Glob_Var.DisplayWatchdog.tTimeout:= T#1500MS;<br/> END_IF</p> <p>Notes:<br/> Glob_Var.DisplayReceive is of type J1939.ReceiveParameterGroup<br/> Glob_Var.DisplayWatchdog is of type J1939.ReceiveWatchdog<br/> The above code is done once and not cyclically</p> <p>I'm monitoring Glob_Var.DisplayWatchdog.xError cyclically</p></div>