Hi Chris, I double checked and the value I’m trying to write is most definitely not being overridden. I have tried with TwinCAT (within Visual Studio) and changed the value and it worked while the PLC program was running.
If you need more info or input, just let me know. Ty very much Patrick Boisclair Analyste - Programmeur senior / Senior Analyst Programmer 462, rue des Forges, Trois-Rivières (Québec) G9A 2H5 CANADA noovelia.com From: Patrick Boisclair <[email protected]> Sent: February 14, 2021 12:02 PM To: [email protected] Subject: Re: TwinCAT ADS - Write value to PLC Ty Chris, Pretty sure it is not overwritting it. Im out for the afternoon, but will double check tonite. Will keep you informed. Best regards Get Outlook for Android<https://aka.ms/ghei36> Patrick Boisclair Analyste ‑ Programmeur senior / Senior Analyst Programmer [cid:[email protected]] 462, rue des Forges, Trois‑Rivières (Québec) G9A 2H5 CANADA noovelia.com<https://www.noovelia.com/> ________________________________ From: Christofer Dutz <[email protected]> Sent: Sunday, February 14, 2021, 10:58 AM To: [email protected] Subject: AW: TwinCAT ADS - Write value to PLC Hi Patrick, I thought I had tested writing of values via ADS … will re-test. But when writing you have to be sure the PLC doesn’t overwrite this value internally. I remember when I tried „overriding“ outputs of PLCs with a written value. In the end it turned out that the value was overwritten, but the PLC program just set it to it’s original value as part of the program execution. Chris Von: Patrick Boisclair <[email protected]> Gesendet: Sonntag, 14. Februar 2021 16:26 An: [email protected] Betreff: TwinCAT ADS - Write value to PLC Hi all, I’m using the TwinCAT ads driver with the 0.8.0 realease of PLC4X. I can read all the values from the PLC without issue, but writing doesn’t seem to work. I don’t know what Im doing wrong. Here is the writing code: PlcDriverManager driver = new PlcDriverManager(); try { PlcConnection plcConnection = driver.getConnection( "ads:tcp://10.10.11.77?sourceAmsNetId=172.29.64.1.1.1&sourceAmsPort=32&targetAmsNetId=5.62.206.200.1.1&targetAmsPort=851"); if (!plcConnection.getMetadata().canWrite()) { return; } PlcWriteRequest.Builder builder = plcConnection.writeRequestBuilder(); builder.addItem("lightToggle", "MAIN.E_Lum_1:BOOL", true); PlcWriteRequest request = builder.build(); request.execute().whenComplete((response, exception) -> { if (exception == null) System.out.println("WRITING DONE...."); else exception.printStackTrace(); }); If I change the “MAIN.E_Lum_1:BOOL” to a value that doesn’t exists I get a error saying me the name is invalid which is fine and tells me its really communicating with the PLC. Now, when using the good name, I don’t get an exception and I see thee “WRITING DONE…” in the console. However, the value is unchanged in the Beckhoff PLC. Is there anything I don’t understand ?? Thank you very much !!! Here’s the Beckhoff PLC setup: [cid:[email protected]] Patrick Boisclair Analyste ‑ Programmeur senior / Senior Analyst Programmer [cid:[email protected]] 462, rue des Forges, Trois‑Rivières (Québec) G9A 2H5 CANADA noovelia.com<https://www.noovelia.com/>
