Published by xcosminel November 19th, 2008
in BACnet MSTP, RS232 and RS485.
Q: Why can’t we change to a 76800 baud rate on a PC but are able to on some devices?
A: The reason for this is that the the standard 16C550 PC UART is too slow to keep up with the signals coming in and out. 76800 is not a standard multiple of the UART clock frequency.
Devices can be customized and therefore allow baud rates of 76800. If your PC has a customizable COM port card where you can program the bit clock then you would be able to set this value.
There is no fix for this, but if you find a converter that can change 76800 to a higher UART this could be a work around.
The standard frequencies are:
- 150
- 300
- 1200
- 2400
- 4800
- 9600
- 19200
- 38400
- 115000
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Published by xcosminel November 19th, 2008
in Uncategorized and Utilities and tools.
After Windows Update performs an update for your computer, it usually prompts you to restart. You might accidentally hit restart and all your unsaved work gets lost.
The way to stop Windows Update from nagging you to restart is to end the Windows Update service until next time your computer starts. This is done with or without the command prompt like so:
Without command prompt:
Go to Start > Run, type net stop wuauserv and press [Enter].
With command prompt:
Go to Start > Run, type cmd and press [Enter].
In the command prompt, type sc stop wuauserv and press [Enter].
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Published by xcosminel November 10th, 2008
in Cables, FieldServer, RS485 and Uncategorized.
In early versions of the FS2510 the serial LED does not flicker even when
there is normal RS485 activity.
Devices with firmware version 5.12k are known to require a firmware upgrade.
Contact Tech support for help.
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