C
Hello,
We are experiencing an issue with an fuel tank level output on an AI card (Siemens AI card 331-7KF02-0AB0). We have a valid analog signal from the radar level transmitter in the field to the remote I/O PLC, but nothing from there to the control PLC.
The fuel level signal is normally shared by two generators with identical PLC set-ups. We have shut down one unit for re-build (the master unit) and are now having issues with the other generator (the slave unit). All wiring terminations were matched from the master to the slave and every signal (input/output) has been working perfectly except the level signal from the fuel tank.
The fuel level is used to initiate an automatic 'fill request' and a solenoid opens to re-fill the fuel tank. At the moment our tank level, transmitter output and mA input into the AI card are all sound. There is no output to the supervisory PLC - on the HMI for fuel level we see a level of 0. There is a red LED on the AI card indicating SF, but when we enter 'Diagnostics' the hardware for the module is noted as being 'OK'.
Other outputs on the AI card are indicating correctly on the control PLC without issue ... it is just this channel that is giving us a problem.
The square range selector on the side of the card is in the correct position for our application.
My question is that when everything on the system is working except a single AI, where do we look next for the issue? Is there something in the program that may have been upset during the swap from slave to master? Do we need to re-download the program to the PLC?
I am not familiar with Seimens products, so any assistance or guidance would be greatly appreciated.
Cheers!
We are experiencing an issue with an fuel tank level output on an AI card (Siemens AI card 331-7KF02-0AB0). We have a valid analog signal from the radar level transmitter in the field to the remote I/O PLC, but nothing from there to the control PLC.
The fuel level signal is normally shared by two generators with identical PLC set-ups. We have shut down one unit for re-build (the master unit) and are now having issues with the other generator (the slave unit). All wiring terminations were matched from the master to the slave and every signal (input/output) has been working perfectly except the level signal from the fuel tank.
The fuel level is used to initiate an automatic 'fill request' and a solenoid opens to re-fill the fuel tank. At the moment our tank level, transmitter output and mA input into the AI card are all sound. There is no output to the supervisory PLC - on the HMI for fuel level we see a level of 0. There is a red LED on the AI card indicating SF, but when we enter 'Diagnostics' the hardware for the module is noted as being 'OK'.
Other outputs on the AI card are indicating correctly on the control PLC without issue ... it is just this channel that is giving us a problem.
The square range selector on the side of the card is in the correct position for our application.
My question is that when everything on the system is working except a single AI, where do we look next for the issue? Is there something in the program that may have been upset during the swap from slave to master? Do we need to re-download the program to the PLC?
I am not familiar with Seimens products, so any assistance or guidance would be greatly appreciated.
Cheers!