rob_m

The Instruction have to be before the function that uses the simulated input. The best method is putting it at the beginning of the scan, so it is overwriting the reading of the AI. Hope it helps, Robert

Thank you for you help. I hope that Schneider will improve printing values of variables. Regards, Robert

Thanks for answering, I need a list of the variables with names, addresses AND actual values. Please answer again. Regards, Robert

I work with Schneiders Unity 2.3 SP1. I didnt find how to print all variables including their values. Please help, Thanks in advance, Robert

I have to convert a 984 program to Unity. In the 984 are 11 PID2 loops. In Unity I want to use PIDFF. In which cases I have to choose between parallel or mixed mode? Which mode, parallel or mixed, do behave more similar to PID2 of 984 Plcs? Wich parameters, exept Parallel and mixed, do make the PIDFF more similar to PID2? The Plc that have to be changed is controlling an existing plant and we want easy and quick starting the plant again. On the other hand, maybe I am not right for wanting to stay similar to PID2? Maybe I should choose the mode that is better for each loop? If yes how to do that? Thanks in advance, Robert

I have to convert a 984 PLC to Unity and have the following problem. 1. In Modsoft are 2 types of coils, normal and latched. Normal coils go zero at startup of the PLC, no matter of their values before shutdown. Latched coils keep their last value before shutdown. I do not see a latched coil in Unity. How do I make normal and latched coils in Unity? 2. What is the difference between Bool and EBool variables and how to use them in Unity? Are they interchangeable? When is it allowed to use each of the types. And more important, When is it Not allowed to use each type? Regards, Robert

Is it possible to program a Quantum Unity CPU with Concept software? Do exist a flash executive that makes it possible? Regards, Robert

Thank You, Robert

We use MSTR blocks for reading registers from one PLC to another. We use MODSOFT. How do I have to check if a communication error occurs? -Is it enough to use the middle output of the MSTR block? -Maybe better to read a register of a counter from the remote PLC and checking if the value changes? -Maybe better to read the Error register of the MSTR block?

I think that Modicon have not such a bit. Work around : Put a coil into the first network, first row and first colomn, connected to the left vertical line. A "transitional on" contact of that coil will be close only during the first scan. Hope this helps.