westwind80

Hi glavanov,   Really appreciate your clarifications. Made my planning easier. Regards, Wesley

Hi PanicMode,   Really appreciate your detailed explaination. Below are the plc diagram of the connection I have.  Can the 'K0Z0' be referring to special device of 'fx2nc-4ad' in the diagram below? the 1st 'fx2nc-4ad' ?

Hi all,   Can someone help me to understand the ladder diagram below? I am a newbie in plc programming. I'm try desperately to learn

Hi All,   I'm new to mitsubishi plc. I am desperate for help.  Please anyone, can help me direct me to the solutions I face.   Old Unit configurations : Consist of 1unit plc cpu / X2 units analog input / X2 units analog output. Below are the hardware installation sequence fx2nc-64mt-dss / fx2nc-4ad / fx2nc-4ad / fx2nc-4da / fx2nc-4da New Unit configurations : Consist of 1 unit plc cpu / X2 units analog input / X2 units analog output. Below are the hardware installation sequence left of plc cpu : fx3u-4da-adp / fx3u-4da-adp / fx3uc-64mt-dss / right of plc cpu : fx3uc-4ad / fx3uc-4ad    As per mitsubishi replacement recommendation for the obsolete parts as below :- plc cpu : fx2nc-64mt-dss => fx3uc-64mt-dss (both with 16kbps memory card installed) analog input : fx2nc-4ad => fx3uc-4 analog output : fx2nc-4da => fx3u-4da-adp   How I did the migration was to :-  1. copy the plc codes from fx2nc-64mt-dss to GX-developer 2. Saved the projects. 3. Change the "Change PLC Type" in GX-developer from "FX2nc" to "FX3uc" 4. Saved the project again. 5. Moved the wires from old plc to new plc following the same signal channels as the old unit. Meaning from X0 => X0, COM1 to COM1...... 6. Upload the new project to the new plc.   After completing the task, the plc successfully "Run" without error. The problem is the equipment that is relying on the analog output (fx3u-4da-adp) is not working. Such as the RPM analog meter is not getting the signals. I suspect it has something to do with the ladder diagram after the upgrade. Might need to recode. I have not much experience in ladder diagram in plc. Can anyone guide me please.....I am really desperate for a solution.  Thank you for your time and help.