After i put the one code string in subprograms Generated Code which are created by the Modbus Master Configurator. After all Modbus RTU connections goes to Timeout.
Nothnig help - reset PLC, load old version and change PLC. Please help
You might want to go back in the modbus configurator and generate the code again, that should over write any changes you made to it by mistake. Make sure you save under a different filename incase something goes wrong.
For reference;
Dear colleague! I made remove code and generate again. it does not work . Then i made new empty project and create code only for Modbus connection with one pump. also not working.
it seem to me such problem more deep inside in PLC or 750-653 module ! I have great problem in my job cause of it. Please HELP! I can send project file.
Hello Arsenio,
Could you get in touch with the WAGO technical support of your country ?
I think they should be able to help you way faster than here.
Dear Colleague! According with your advice i send email to technical support. Also i am moving in parallel way. I don’t use Modbus configurator. I took a Modb_l05.lib library and configure Modbus Master RTU CFC module. Maybe you know what is type of variable typRING_BUFFER which is mentioned there?
ReceiveBuffer : typRING_BUFFER;
SendData : typRING_BUFFER;
Hello !
Have you tried to establish a connection with your pump using software like ModRSsim for example?
Hello! I have using ModLook and Moxa Uport from my PC to Pump. It works. I received data and control pump. I have problem with connection between PLC 750-891 750-653 modbus module and direct to Pump. I supposed that you are offering to me connect my PC by Moxa Uport with 750-653 directly and analyze the protocol message TIMEOUT by ModRSsim software?
After reboot PLC XML communication with Weintek HMI is broken. How can restore XML? I made generate XML file for outside using and import in EasyBuilder. But its not working
Make sure that you have the 750-653/003-000 and not the 750-653. The 750-653 has 3 user data bytes and because of that, the module will not work for Modbus RTU communication.
it’s fact that all pumps have been controlled by Modbus 750-653/003-000 before my mistake. Everything was fine before i put string in to generated code. How can i load SW again? is there SD card in 750-891 like in PFC200? Or i need to download firmware from official site?
Maybe use IO Check to investigate settings inside the module.