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CHPA
S
ERIES
B-28
THIS
DOCUMENT
IS
THE
PROPERTY
OF
COMMUNICATIONS
&
POWER
INDUSTRIES.
REPRODUCTION
OR
RELEASE
WITHOUT
EXPRESS
PERMISSION
IS
STRICTLY
PROHIBITED
D
OC
.01023245
R
EV
.R
9.
After erasing the Flash RAM, the PC’s program will start programming the Flash RAM. The
CHPA’s display will show:
C H P A P R O G R A M L O A D E R
P R O G R A M M I N G F L A S H
M E M O R Y
P L E A S E W A I T
At the same time, the PC screen will show the percentage of memory programmed. The
programming takes approximately 2.5 minutes.
10.
After Flash RAM programming is complete, the display will show:
C H P A P R O G R A M L O A D E R
P R O G R A M M I N G C O M P L E T E
P R E S S A N Y K E Y T O
R E S T A R T C H P A
Press any key to restart the CHPA. The CHPA should then successfully complete the POST
(Power On Self Test) and be available for use. Disconnect the PC from the CHPA. Refer to the
Troubleshooting section below if errors related to the Flash RAM appear.
B.16.4 Error Messages Associated with the Flash
RAM
1.
Several error messages may occur during programming. All of them allow the user to
restart the programming process. If multiple failures occur, the serial cable connection may
be intermittent or there may be excessive noise on the serial line. Take steps to assure a
solid connection between the PC and CHPA. Use a shielded cable where the shield attaches
to the connector shell. Use a short cable - don’t exceed 20ft. The error messages you may
see include:
I N C O R R E C T M E S S A G E
L E N G T H E R R O R
P R E S S A N Y K E Y T O
R E T R Y
Incorrect message length error means that the CHPA hasn’t received all of the characters that it
expected to receive. This error will appear if the serial cable is removed during Flash RAM
programming.