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How to pass communication port from Windows 7 to Windows Virtual PC?


Some older software is not compatible with Windows 7. The software can be run in Windows XP in Windows Virtual PC. However, problem arises when older software needs to access communication port such as RS-232 port.


Physical ports in Windows 7 can be mapped to Virtual PC.

Make sure that communication port […]

How to use CompactFlash card to Up Grade ControlLogix Firmware?


New ControlLogix shipped with older firmware from factory. If your application use newer firmware, you need to upgrade the system’s firmware. You can use ControlFlash to upgrade firmware. Or you can upgrade firmware from RSLogix5000 download. However, the best and fastest way to upgrade firmware is through CompactFlash card.

How to use CompactFlash card […]

How Allen-Bradley Panelview Handles Tag Values at Start up?


Allen-Bradley Panelview was work horse on the plant floor in 1990s. It is out of AB’s support as 2013. However, there are still a lot of legacy systems at work. It is interesting to investigate how it handles tag values at various situation at start up.

Tag Values at start up

There are multiple […]