Hi, I hope someone here can help me. I am trying to remotely control Cole-Parmer Mass Flow controllers (EW-32907-71 and EW-32907-63 respectively) from my computer. Each mass flow controller is connected to an NI 4-port RS-232/USB hub via a mini-din to serial cable. The hub is then connected to the PC via a USB cable. The PC fails to recognize the MFC when trying to communicate with it. I have tried Hyperterminal as well as Flow Vision SC and Labview (using Alicat VIs) in an attempt to remotely control the devices. As per the instruction manual attached, the settings for the serial port are set to: -19,200 baud -8 bits -no parity -1 stop bit -no flow control The settings on the MFC were also set to 19,200 baud. Both A and @ were tried as IDs on the MFC, but to no sucesss. While in Hyperterminal, no data is received, and I am unable to provide a setpoint to the MFC in any of the 3 programs. I have tried skipping the NI hub and connecting one MFC directly to the PC's serial port, but still no success. I performed a loopback test on the serial ports in Hyperterminal successfully as well. I even checked the BIOS to ensure the serial ports were active. How can I get my PC to effectively communicate with the device? Any help is greatly appreciated. Thanks!

Instrument Control (GPIB, Serial, VISA, IVI)

Dylan,

You need to PM me an email address. I'll send you a zip archive with the driver and an example project.

Dave

David Boyd
Sr. Test Engineer
Abbott Labs
(lapsed) Certified LabVIEW Developer

Message 21 of 21

(831 Views)