On Nov 6, 2009, at 9:08 AM, nick wrote:
I've got a big UPS from an italian manufacturer MSC elettronica
which should be megatec protocol based. They distribute it with
Upsilon2000, developed by Megatec, and with a cable listed on the
megatec site:
Which cable? M2502, M2505, or something else?
http://www.megatec.com.tw/FAQ.htm
How do I know the M2505 cable is the one that should be used on my
UPS instead of M2502 cable?
UPS that use both these cables are TRUE RS232 UPS with MegaTec
protocol. The difference is:
UPS communicate with computer on pin 6.7.9 ---> M2502 cable
UPS communicate with computer on pin 2.3.5 ---> M2505 cable
There is only one pair of data pins for a PC RS-232 port, so I assume
that the above pin assignments refer to the UPS side of the cable.
Does your UPS have any documentation saying which pins are TX and RX?
UPS listed below are the ones who uses M2505 cable:
Delta: GES-N
Chroma: 91 Series
Phoenixtec: C Series
So, as far as I can tell, it should be using the megatec driver, but
I'm not sure if there's something I need to change or specify to let
it know that the signaling pins are 2.3.5, or if in fact there's
another better adapted driver in this case?
I also have a dumb port that I can fall back on, but I'd prefer a
bit more information if at all possible.
I'm using CentOS 5.0, with nut 2.2.0, and ttyS0 is the only serial
port I have available on the machine.
setserial -g /dev/ttyS0
/dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4
The cable is good and no one is using the serial port (at least I
never receive any indication of this).
What are you using to test the cable?
Can anyone give me an idea of where to look or try next?
How is the driver failing?
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