Control SCPI instrument from simulink

Hi,

i'm trying to interact with a power supply controller from simulink via SCPI commands to set voltage and current for an electrolysis-stack. The device uses a serial RS232 interface and I've plugged the cable from the controller via an addapter into the USB-port of my PC. I'm able to control the device with the supplied software (so i dont need to install an other driver?!), but i dont manage to get a connection to the device from simulink ("PSC RS232 EXT" from Delta Elektronika).

I'm using the "query instrument"-block to send the SCPI command and get a response and test the connection, but could also use the "serial receive"-block. The instrument should identify it self with the command *IDN?

The configuration parameters (COM1, Baudrate) are set correct, and the manual says that it can be controlled with SCPI commands from other programs. I also tried to receive the voltage of the power supply. When i sent the query command to receive the voltage and set the data format to binary the Display showed "82".

Does anybody know what i'm doing wrong?

Is it a problem with the data format?

[chrisw23]

Check your Windows Device Manager for the COM Port used. COM1 is not common for Serial-Usb converter com ports. Typically they start at COM3. Just to check...

Before you can send cmds and queries a communication session must be opened and it has to be closed too. The supplied software can't be used in parallel. The session is probably exclusive to one application.