Communicate via serial connection with smart UPS?

[Anonymous user]

I cannot get my SUA-1500 to communicate with my win7 ultimate 64bit system and can't figure out why. My serial ports check out fine using a loopback connector and other serial devices but I don't know how to veriify that the UPS serial port is working (USB works fine). I thought I might be able to verify proper communication if it were possible to connect to the UPS via PuTTY or Hyperterminal or similar terminal program. I am hoping that the UPS would be able to respond to a command or two (sorta like a modem AT command) which would demonstrate the I have a good "electrical" connection between the UPS and the PC...does anyone know if this is possible for test purposes and what a command/response might be?

I am using a 940-0024D serial cable and PowerChute v9 (didn't work with v8 either).

Any feedback would be much appreciated.

[Anonymous user · Accepted solution]

Thanks gentlemen...that worked fine. Now all I have to do is try to figure out why PowerChute is balking since I now "know" the hardware and connection is OK

[BillP]

Make sure that there is no application that is using the serial port. For testing you can use Putty and set the port settings to 2400-8-None-1-XOn/XOff. Once you are on the Putty screen press "Shift+Y", this should return an SM on the screen. Press "Shift+A" after seeing SM and this should produce a beep and the LEDs in front should flash once.

[BillP]

i generally use no flow control and have have luck as well. may not hurt to try both settings.