Thinking_hard

Hi, all. I've written a program using GX developer which uses SFC programming. SFC is very helpful because I can write the sequences of steps and transitions fairly easily compared to ladder diagram. I've written workable sequences for industrial washing machines. I'm wondering if anyone can provide insights as to how I can convert my existing SFC programming to use a HMI to input the sequence of programming rather than just hard-coding the sequence everytime. Thus instead of hard-coding this sequence: 1. Wash; 2. Drain; 3. Rinse; 4. Drain. ;5. Spin. I want operators to be able to change the sequence to whatever they like. So they can input 1. Wash; 2. Drain; 3. Wash; 4. Drain... etc. Can this be done using Melsec?

Yes... I've already written the code. But I think the problem is something else. Just for clarification, my voltage reading is taken from a voltmeter measured across the inputs of the FX2N-2AD, not the digital reading taken from the PLC using GX developer. The voltage reading is positive (3.8V) before connecting FX2N-2AD to the base unit, but after connection drops to negative 2.8V. Thanks for the reply...

Hi! Please help. I'm really puzzled by this. I've got a FX2N-32MR base unit. I'm trying to connect a 0-10V pressure transducer to the FX2N-2AD voltage input. But when I switched on the PLC and the FX2N-2AD, the voltage reading gives me -2.8V. The specs of my transducer states that it operates in the range of 0-10V. So the negative voltage is completely strange. The thing is when I disconnect the FX2N-2AD from my base unit, the voltage reading gives a normal 3.6V reading. But when I reconnect the FX2N-2AD to the base unit, the voltage drops again to negative. What am I doing wrong??? My pressure transducer gives a internal impedance of 202Mohms. That means it shouldn't interfere with the FX2N-2AD unit. Please help.

Hi, there! I need some instructions on SFC programming. Just need to know whether instructions will be executed in a state, if I simply let the sequence run through that state without any time delay at the state itself. For example, | -|- Transition if m1 is on | S1 | -|- No transition statement | | Suppose I have the following instructions contained in S1: Add d1 d2 d3, Sub d4 d3 d5 etc.... Will the instructions in S1 execute? Or will it simply bypass because transition occurs instantaneously? Thinkinghard!