I have a SMART2200RMXL2U UPS. When I connect this ups to a protocol analyzer by using it's RS232 port (COM2 written on ups), I didn't see any coherent data flowing on analyzer. What is the RS232 configuration(like 8N1 etc..) of this ups? Also I need the message passing formats(commands,initialization etc..) of this ups. If you have any idea or experience on this ups, please share with me.
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You can not directly wire USB to rs232 serial via wires. They are different protocols with different voltages, speed, communications, etc. You require an active electric converter which contains circuitry to transform the protocol. USB to serial converters are pretty cheap. They will automatically show up as a com port on windows or as /dev/ttySx on Linux.
If the interface cable has a serial port connector, and you need to use a USB --> Serial Port adapter to connect to your computer; it may be the source of the problem. The cheaper USB --> Serial adapters have issues with timings that the serial port protocols rely on. You may have luck by reducing the speed of the serial port to something like 19200, 14400, 9600, 4800 or even as low as 2400 baud. Make sure that the adapter name (COM1, AUX1, COM2, AUX2 , etc.) is the SAME one you're telling the program to use to access the radio's memory and the port's parity, number of stop bits and error checking type match the program.
Additionally, different radio manufacturers use different methods to set the radio's memory up to be read and / or written. Make sure the radio is ready to be read and the program is trying to read - not write (and vice versa).
If you're still having issues, please reply and provide the radio brand and model, interface cables and adapters, and program software and computer Operating System.
If the cable works on the Zebra it should work on the Datamax. It must be a RS232 serial null modem cable.Check the serial port settings and make sure the printer setting match the PC serial port settings. Baud Rate=________? Data Bits=________? Parity=_______?Stop Bits=________? Handshaking=____________?
The typical settings are Baud 9600,8,n,1 Xon/Xoff. Also make sure of the comm port being used. com1,com2......etc
These units, while hot swappable, will NOT start with dead batteries connected.
You will have to replace the batteries to confirm if the unit is still usable. Sealed Lead Acid Batteries do have a shelf life when a charge is not applied and will fail after several months of sitting around.
If your unit was working fine before it was put in storage, I definitely would consider just replacing the batteries. It is possible that the batteries are connected loosely, you can try opening the unit up to double check all the connections but if it has been sitting for more than a couple months, I would definitely consider the batteries dead.
I purchased the Nikkai USB to RS232 adapter from Maplin and could not get the device working. (Maplin staff not much help!) The lead uses the Prolific PL-2303 device but Prolific do not supply the drivers to end users. However I found the drivers that appear to work at:
This then recognises the lead as a COM port. So far everything seems to work OK. (Null modem check and basic 9600 data transfer.)
If you have a BackUPS CS, you are probably either using it with the USB cable that is supplied or with the 940-0128A supplied by APC, which permits running the UPS in dumb mode. By building your own cable, you can now run the BackUPS CS models (and perhaps also the ES models) using smart signalling and have all the same information that is available as running it in USB mode.
The jack in the UPS may be easily use a 8 pin RJ45 connector. It is easy to construct the cable by cutting off one end of a standard RJ45-8 ethernet cable and wiring the other end (three wires) into a standard DB9F female serial port connector.
Though these UPSes are USB UPSes, APC supplies a serial cable (typically with a green DB9 F connector) that has 940-0128A stamped into one side of the plastic serial port connector.
Here is suggested scheme of original 940-0128A cable APC Part# - 940-0128A
computer --------- Inside the Connector--------- UPS
DB9-F | | RJ45
pin - signal | | Pin - Color
4 DSR ->|---+ |
| | diode resistor |
6 DTR ->|---+---->|----///---o kill power | 8 Orange
1 DCD <-|----+ |
| | |
2 RxD <-|----+----------------+--o low battery| 3 Brown
| | |
7 RTS ->|----------+--///--+ |
| | |
| +--///--+ |
| | |
8 RI <-|----+----------------+--o on battery | 2 Black
| | |
9 CTS <-|----+ |
| signal |
5 GND --|-----------------------o ground | 7 Red
3 TxD | |
| chassis |
Chassis/GND |-----------------------o ground | 4 Black
| Not connected | 1, 5, 6, 9, 10
This machine has a parallel port. Try to print via parallel cable. If it works, consider staying with it. Serial ports are a pain to manage. If you absolutely have to do it via rs232 though.... Question 1. Has it ever printed?
If yes, Go into Windows Printers and Faxes control and select the Zebra or whatever printer that you are using. Right click on it and you should get a menu that at the bottom say "Properties", select that, then you should get a new window with tabs at the top. You want the tab for "Ports". Select it and you will see all of the different output ports that you can direct your printing. RS232 is a COM port. So start at COM1, check it and try to print. If that doesn't work, go to COM2, etc.
Last resort, If you can't get control via the printer driver program, you
will have to try redirecting the print manually (now you will
understand why I said to stay with parallel output).
What you have to do is redirect your printing via the dos "mode" command.
Under "Start Menu" goto "Run" and put in "CMD" and click "OK".
This opens a black square window with a cursor blinking. Type in this:
mode com1:9600,n,8,1 (enter)
mode lpt2=com1 (enter)
Tell your program to use LPT2 if you can and see if it works. By now a parallel cable instead of RS232 should be looking really good. Good luck!