Change in RS232

[Anonymous user]

I am trying to connect to a SMART-UPS RT 2000 over rs232. I have the RJ-45 to USB and a serial connection with a 940-1524C cable.
My hyperterminal settings are 2400bps, 8 data bits, no parity, 1 stop bit, and none for flow control.

This has been tried on a Windows XP machine and a Windows Server 2008 to no success. Has something changed in the way UPS's connect over RS-232?

My goal is to send a receive messages from the UPS through software I wish to write. SMNP has been looked at, but a lot more work than I wish to put into it and I do not know of a good way to use telnet through software writing.

Any suggestions will be helpful.

Message was edited by: BlueDracus

[BillP]

hm ok so you tried the same cable between both UPSs with the same computer/COM port?

i am interested in if when you try to connect the USB cable to the computer and UPS if Windows, for instance, brings up the Add New Hardware wizard or populates the UPS in device manager. when you switch from USB back to serial though, you have to go through that braindead procedure to enable the serial port again though.

[BillP]

can you confirm the model number on this UPS? is it SURTA2000XL?

if so, it sounds like you are doing everything correctly. you want to make sure the UPS is turned on of course and then connect the 940-1524 cable to the DB9 port on the back of the UPS. make sure the RJ-45 to USB cable is connect connected at the same time, even if its not being used. if you have tried to do that, you can try and reset the UPS by removing any load, turning it off, removing AC power to it and by holding down the off (o) button until you hear the UPS click. then you can reconnect the AC power to the UPS as well as the load and then just connect the serial cable again.

the port settings you mentioned are correct for this UPS - 2400, 8, none, 1, no flow control. when you establish a connection, try just hitting "Shift" + "Y" instead of immediately trying to hit enter if you are doing so. the UPS should return SM>.

if it doesnt after checking/trying the above items, let me know.

[Anonymous user · Accepted solution]

Now things get interesting.

I also have a Smart-UPS 2200 - JS0602002736 and I can log into this machine with no problems.

The SURTA2000XL did not respond to the things you suggested. When I enter a command, the blinking cursor behaves oddly. Instead of the constant on and off, it seems to blink constantly when the cursor shows. Something might be getting through but I don't know.

I appreciate your help.

Message was edited by: BlueDracus