Troubleshooting
6-3
Problem isolation
If you encounter a problem with a PIO-24 board, use the instructions in this sec-
tion to isolate the cause of the problem before calling Keithley for technical support.
If your board is not operating properly after using the information in Table 6-1,
continue with the next two sections to further isolate the problem.
Table 6-1
Troubleshooting information
Symptom
Possible Cause
Possible Solution
Board does
not respond
Base address is incorrect or not
consistent with what the pro-
gram is addressing.
Check the base-address switch
setting on the board against the
setting shown in the DriverLINX
configuration. If the base address is
set correctly, make sure no other
computer device is using any of the
I/O locations beginning at the
specified base address. If necessary,
reconfigure the base address.
The interrupt level is incorrect
or not consistent with what the
program is addressing.
Make sure no other computer device
is using the interrupt level specified
in your program. If necessary, reset
the interrupt level.
The board configuration is
incorrect.
Check the remaining settings in the
DriverLINX configuration.
The board is incorrectly aligned
in the accessory slot.
Check the board for proper seating.
The board is damaged.
Contact the Keithley Applications
Engineering Department.
Intermittent
operation
The most common cause of this
problem is that the I/O bus
speed is in excess of 8 MHz.
Reduce the I/O bus speed to a maxi-
mum of 8 MHz (to change the I/O
bus speed, run BIOS setup). See
your computer documentation for
instructions on running BIOS setup.
Vibrations or loose connec-
tions exist.
Cushion source of vibration and
tighten connections.
The board is overheating.
Check environmental and ambient
temperature. See the documenta-
tion for your computer.
Electrical noise exists.
Provide better shielding or reroute
unshielded wiring.
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