[GEN Protocol with Unitronics PLC RS485 communication]

2 hours ago, sachinda said:

Hi dg450

I think you mentioned the COM test with the power supply and the PC. Here I attached the picture in the manual. I test the serial communication according to the guidance in the picture. The "OK" message came. and also able to read the voltage in the hyper terminal and also can set voltage to the power supply using the communication between power supply and PC. baud rate adjusted, set LANG to GEN etc.

@sachinda, that is correct. The main difference was that I used PuTTY.  I re-read your post and noticed you need RS485 communication.  I misread that!  I tried to connect using RS485 using a usb to RS-485 cable, but I am unable to communicate with the device. However, my putty session doesn't timeout. It makes me think one of my settings is off...

[GEN Protocol with Unitronics PLC RS485 communication]

@sachinda,

I happen to be trying to interface with a TDK Lambda Z+ instrument as well right now. After a week I figured something out. This is for a z100-8-u model. I wanted to get SCPI to work, but I found a way to get the GEN protocol to work, which is what you need.

Download the USB driver for the Z+ unit here, Z+ USB Drivers Download Zip. or find it on the webpage,  https://uk.tdk-lambda.com/technical-centre/software-tools.aspx 

plug in a USB cable from your computer to the unit. 

Setup the unit for Interface-USB, BAUD-9600, LANG-GEN, ADR-6

Download Putty

Start a default Putty session and change the following parameters.

Set connection type to serial line to COM("""this number will be based on your computer""")

Go to terminal and check, "implicit CR in every LF", and "Implicit LF in every CR". Also, under line discipline options, make sure local echo is "Force on"

Under connection>serial>Baud-9600, data bit-8, stop bit-1, parity-none,flow control-none.

Start the session

It should be a blank screen, but it shouldn't exit out. 

Type the following to get started:

ADR 06 

press enter

"OK" should be returned.