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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Seems like you need to setup the communications protocol. You need to setup the type of communication that the device you are connected too if serial port then RS232 plus baud rate data bits parity etc.
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.
RS232 is simply a serial data transmission / communication port. It has never had any signals involved in video. It has been used for data exchange between computers and for connecting peripheral devices like modems and printers to computers. It also has been used to connect a remote keyboard / screen, such as a "dumb terminal", to a computer as an additional I/O device.
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.)
First check the com port speed of computer port which you connected scanner .Com port speed should be 9600.
To change com port speed in computer go to computer/properties/device manager.
Select the ports eg com1 .Right click communication port go to properties and select port settings Bits per second should be 9600.
Serial scanner can not be test in word or note pad.you can download the RS232 software from below link and test the scanner http://www.lookrs232.com/
Your reseller is correct. The wire (Meade cable #505) goes from an RS232 serial port on PC to a 4pin RJ plug. This plugs into the 2nd socket on the bottom of an Autostar 497 handset, the other socket being used for the curly lead to the telescope. So it goes PC to Autostar to telescope.
A common error is to try plugging the serial wire into an "AUX" ort on the telescope control panel - same connector. Not only does this not work, it can cause a lot of damage.
Wired like this you can control the scope from Meade's Autostar Suite (or many other planetarium softwares). You can also update the Autostar software to the latest 2009 version.
What else can go wrong? Well, many people want to control from a laptop, and modern ones don't have RS232 serial ports. Then you need a USB-to-serial convertor dongle, which effectively add a serial port to a laptop. But they often give it a very high port number (eg COM17) that the planetarium software does not find. Use Control Panel to reset the USB-serial-port to COM 1, 2, 3 or 4 and all should be well. But it can be a right fiddle!
OK LOOKING AT THE SPECS FOR THE EXTENDER YOU DO NOT NEED TO WORRY ABOUT THE SERIAL CONNECTIONS, WHEN USING THE SERIAL CONNECTIONS YOU NEED RS232 CODE STRINGS TO CONTROL THE DENON OR ANYOTHER DEVICE THROUGH THIS EXTENDER USING THE RS232 CONNECTIONS.
IT LOOKS LIKE YOU CONNECT AN I/R EMITTER FROM AN MINI JACK I/R CONTROL PORT ON THE BACK AND THE OTHER END TO THE I/R WINDOW ON THE DENON