Hardware reference guide

Intelligent/Special Purpose
386
35013379 11/2011
Front Panel Controls
The Hot Standby module has three controls on the front panel: a function keyswitch,
a designation slide switch, and an update button.
Keyswitch and Program Update Button
The following figure shows the keyswitch and program update button.
The keyswitch has three positions: off line, xfer, and run:
z Off line – Putting the key in this position takes the controller out of service.
z Xfer – When the key on the standby unit is in this position, the standby is
prepared to receive a full program update from the primary controller. The update
is initiated by pressing the program update button, which is located on the front
panel between the function keyswitch and the cable connectors. If you turn the
key on the primary unit to xfer, the system will ignore your action.
z Run – The switch should be in this position except when initiating a full program
update or taking the module off line.
4 6604 powerdown interrupt error
6605 UART initialization error
5 6503 RAM address test error
6 6402 RAM data test error
7 6301 PROM checksum error
8 C101 no hook timeout
C102 read state RAM timeout
C103 write state RAM timeout
C200 powerup error
Number of Blinks Code Error