Failed scale readings after moving to a new computer.
After moving the Flowcon
board into a new computer, the scale readings may fail to properly display on the batching
application main screen.
|Most computers come with a
COM2 port which is both enabled, and using IRQ3.|
|The Flowcon board uses IRQ3,
but does not use COM2|
|The problem arises if the
ISA motherboard does not leave this IRQ3 alone when the COM2 is not otherwise used.|
|It happens when the chipset
does route or share its interrupts correctly.|
|If COM2 uses IRQ3 the
Flowcon board will conflict.|
|When running the integrated
diagnostic program, the "polling mode" scale test will work correctly but the
"interrupt mode" tests will not.|
1) Disable the port
|The disadvantage of this
solution is that you have to re-solve this issue if later you want to add a device that
needs a com port; like a remote display, or data to an external machine.|
2) Disable the interrupt for the COM2
|This is the best solution if
you can do it, as remote displays and host data comm do not use an interrupt.
Unfortunately, some BIOS's will not allow this option.|
3) Reassign the interrupt for the COM2
|This is the ideal solution,
because it keeps all the function of the COM2 port available for future needs. Again, this
may not be allowed in the BIOS.|
4) If you are not using the port, reassign it to a
different COM assignment.
|In choosing an address, do
not use COM1 at 3F8; do not use IRQ3. Suggest trying for COM3 [at 3E8] with IRQ4, or
the interrupts suggested in BIOS setup.|
5) Use a different motherboard
|This solution may be easier
and quicker than the next solution. |
6) If you are using the port, reassign the port to a different COM number, and
modify the Flowcon software.
|If your application does use
the COM2 port (typically to communicate with some other piece of equipment) and you are
unable to reassign the interrupt, you will need Flowcon to modify your application program
to communicate with a different port. Reassign the port and send Flowcon a change request
listing the new comm port address. (NOT RECOMMENDED)|
Other Port Conflicts.
there is a conflict between the Flowcon board and the printer port.
|This manifests itself as a
"locked up" batcher, stuck on the opening screen with the time-of-day clock in
the upper left-hand corner of the screen frozen.|
|Reassign the printer port from LPT1 (at address
378, interrupt 7) to LPT2 (at address 278, interrupt 5).
with the BIOS (below) .|
Working with the BIOS (or CMOS) setup screen:
|Get into the computer's CMOS
setup screen. You typically do this by pressing the DEL key while the computer is booting.|
|There should be a section in
the CMOS setup menu labeled "chipset configuration" or "integrated
|The stock address for COM2
is 2F8, and the stock interrupt number is 3. Experiment with the settings for COM2 and see
if you can reassign the interrupt number independently while not changing the port
|Good choices for the
interrupt number are 5, 9, 10, and 11.|
You want to choose an interrupt that does not conflict with anything else in the computer.
|Save the configuration and
exit the setup screen.|