Fx1n Manual

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Jacinda Saleeby

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Aug 3, 2024, 4:40:35 PM8/3/24

to tremlearowkea

hi everyone, I have plc mitsubishi FX1N and inverter delta VFD-L. I want write frequency 50hz from plc to inverter use modbus rtu rs 485 bd. My inverter have address 1, function code is 06h, starting data address is 2001h.Please help me code, thanks a lot.

2. I think You have confusion between modbus ASCII mode and modbus RTU mode of inverter delta VFD-L, you can see this at page 61 of manual delta VFD-L. I done with modbus ASCII mode, it is good working and this is my program (see below)

Also, use the Wait function rather than the wait until msec function between your VISA write and your VISA read. The 1000 msec, wait until next means it will wait up to 1000 msec, but it could be nearly 0 msec if the code before it happens to end right before the 1000 msec interval of the computer occurrs.

thanks for dropping by (coz i remember, you already helped me solve several LV problems before). Actually, I have to many things w/c i don't understand well about the settings. here are the following:

2. about the DTR/DSR, i'm not sure about this, I just check the PCB inside my rs422-rs232C converter and saw the ff: Tx, Rx, Gnd, DTR, DSR. so i assumed the handshaking is DTR/DSR. but i'm confused coz i did'nt saw any handshake selection in PLC set up.

3. the FX PLC model only recommend to used these settings: 9600 transmission rate. so i have no idea on what do i really need to used about the data bit, stop bit, parity bit. maybe because the mitsubishi FX family has too many models, the manual does'nt afford to specify its communication settings.

I still get the same result as shown below. when i'm using LV thru OPC server, i can control and monitor the PLC bits. but no in direct serial connection. i'm wondering if the MX component of mitsubishi is really needed for this situation.