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About nkhan

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  1. Im using a unistream 7 to communicate over serial with a pump. I am able to set settings over using the COM Tx and Message composer, however I am encountering issues with the COM Rx command. I can set rates and volumes without a problem, however I want to also grab the max rate and volume from the pump at the start of the app or when a user pushes a button. I should be able to send "read limit parameter", which then returns the max rate, min rate, max volume, min volume, The following is the return from putty. read limit parameter 29.12145 0.00010 29.31703 0.00269 > However it
  2. Just an update in case others stumble upon this thread. After also trying a serial module (UAC-01RS2) and also having no luck. I started to dig into the hardware manual of the pump I was trying to communicate with. It was saying to include a /r and /n after text commands, however finding a labview program for the pump and going into their functions, it was really Return Carriage and Line Feed that was being sent over with the ASCII text command, not just /r /n. So adding an ETX in the unilogic message composer of ascii characters 13 and 10 for RC and LF, I was finally able to get
  3. Maybe I was not clear. The microusb is being used for programming and is connected to my PC. The pump is connected to the Type A Host ports. I tried disconnecting the PC before testing but still no luck. I thought maybe there could be interference between programming port and host port utilization.
  4. Im having issues with getting communication from a Unistream 7 to a syringe pump through a usb to RS232 cable. I am trying to use the message composer to send commands over but have not been successful. The brand of pump I am using is Chemyx (https://www.chemyx.com/support/knowledge-base/programming-and-computer-control/serial-rs232-commands/) The cable is good as I can take that same cable, connect to a PC, connect thru putty thru its COM port, and type commands without an issue. I enabled "USB for Serial Communication" under the PLC communication tab only changing the Baud rate t
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