BendixKing KPA 900 System RDR-2000 - Manual (Page 15)

BENDIX/KING® KPA 900
Page 1-3
Revision 2
©Honeywell International Inc. Do not print without express permission of Honeywell.
Dec/2007
1.4.2.2 COMPATIBLE PORT NOT FOUND
The KPA 900 is designed to use the SPP type of parallel port. It can automatically
reconfigure several varieties of ECP, PS2, Fast Centronics, or EPP types to operate in the
SPP-compatible mode. It searches for a port at the standard base addresses of 3BC, 378,
and 278, or accepts a user entry of a custom address. If the KPA 900 cannot find a
compatible port, the port settings in the Windows control panel need to be adjusted to
provide an SPP-compatible mode. See the operator’s guide for your computer to
configure the port.
1.4.2.3 FAILED READ OR WRITE OPERATION
The KPA 900 communicates with the CM 2000 with very brief bursts of data during the
read and write operations. Some communications are sensitive to timing variations. The
Windows operating system does not acknowledge a user program as having a higher
priority than the operating system. If a system-level interrupt occurs during a sensitive
portion of a data transfer, the transfer may fail. When the failure is detected, the user is
asked to repeat the operation. This type of failure is infrequent and should not repeat
during a subsequent attempt at the operation. The frequency of this type of failure can be
reduced by closing other programs, disconnecting the computer from the network, or not
moving the mouse during read or write operations.
1.4.2.4 INCORRECTLY REPORTED GOOD BATTERY
The KPA 900 checks the internal battery status when the program is initially invoked.
Some computers require a longer set-up time to reconfigure the parallel port for the KPA
900. A port that is not completely initialized may mask the failed state of the battery
monitor and cause the KPA 900 to show that the battery is good. A CM 2000 may fail to
program correctly with a failed battery. The software will detect and announce the failed
operation, but will not indicate the real problem.
The personal computer retains the port configuration until another program changes it or
the computer is shut down. If the KPA 900 repeatedly fails to correctly read or write the
CM 2000, exit the program and start over. The battery warning will be properly displayed.