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Note: When the CHPA is forced to turn-on with the EPROM program, all the
users settiable parameter like the serial settings and trip points are set to
default. The user needs to go back and reset to the desired values.
B.16.3 Reprogramming the Flash RAM
To update the CHPA's firmware, connect a PC (using either COM1 or COM2 serial ports) to the
Auxiliary serial port (J10). A loader program on the PC and an EPROM based loader program
in the CHPA work together to transfer new software into the Flash RAM. Use the following
procedure to re-program the Flash RAM:
1. On the CHPA, press the MENU key until the display shows:
F P A C
:
2. Enter the Flash Programming Access Code : 111111
3. The CHPA's display will show:
C H P A
W I T H
4. Connect the PC's serial port (either COM1 or COM2) to the CHPA's auxiliary serial port
(J10). The CHPA's auxiliary serial port is factory configured for RS-232, pin 2 is TX (data
leaves unit) and pin 3 is RX (data enters unit).
5. Be sure that the new Flash RAM program and the PC's loader program are in the same
directory.
6. On the PC, start the loader program, which is called FLASHCOM.EXE. On the PC from the
DOS prompt, type FLASHCOM then press the Enter key.
7. Enter 2 digit Rev number of Flash RAM program as displayed on PC disk label; then select
COM1 or COM2 depending upon which PC serial port you are using.
8. As soon as the PC and CHPA establish communication, the display will show:
C H P A
E R A S I N G
The PC screen will display a similar message. If after ten seconds this message does not appear,
the PC and CHPA aren't communicating and the source of this problem needs to be found. See
the end of this procedure for troubleshooting suggestions.
D
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P R O G R A M
E S T A B L I S H I N G
C O M M U N I C A T I O N
H O S T
P R O G R A M
F L A S H
P L E A S E
THIS DOCUMENT IS THE PROPERTY OF COMMUNICATIONS & POWER INDUSTRIES.
REPRODUCTION OR RELEASE WITHOUT EXPRESS PERMISSION IS STRICTLY PROHIBITED
L O A D E R
S Y S T E M
L O A D E R
M E M O R Y
W A I T
CHPA S
ERIES
B-27
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