6 Generac
®
Power Systems, Inc.
COMMUNICATION OK
This LED will be on as long as there is proper commu-
nication between the Remote Annunciator Panel and the
generator control system.
When communication failure occurs, the RAP will flash
the communication LED, and sound the horn. The rate
of flashing will be indicative of the cause of error.
1. No reply from the generator control system -
Frequency = one second on/one second off.
2. Consecutive data errors -
Frequency = 0.5 second on/two seconds off.
This alarm condition can be acknowledged at the RAP
using the “reset” switch - the horn will be turned off and
re-armed, and the communication OK light will contin-
ue to flash until proper communication returns.
AUDIBLE ANNUNCIATOR
See System Status Indicators chart for alarm occur-
rences.
TEST SWITCH
While the test switch is pressed, all lights will light and
the horn will sound. When released the lights will return
to their original status. During this test, communication
to the generator control system will be suspended.
RE—ARM HORN SWITCH
The re-arm horn switch will silence the horn and re-
arm it for new alarm occurrences.
RESET SWITCH
The reset switch is used to acknowledge any active
alarms. It will re-set any flashing light to ON (steady)
condition (or OFF for normally on lights). If the alarm
no longer exists and it has also been latched OFF at the
generator control panel (pre-alarm indicators only) the
active light will go OFF. It will also silence the horn and
re-arm it for new alarm occurrences.
NOTE:
Pre-alarm conditions MUST be reset at the generator
set control panel.
RELAY OUTPUT
The RAP will also provide a pair of Normally Open con-
tacts which will mimic the status of the Audible alarm
(Horn). The relay output is fail-safe (i.e. DC supply fail-
ure will reset the relay to OFF, which will close the con-
tacts).
SOFTWARE SPECIFICATION
In general terms, the RAP polls the generator control
system. The generator control system returns an ASCII
text string which represents the status of the indicator
lights on the panel display.
SERIAL INTERFACE
Default 4800,n,8,2
NOTE:
Set the DCP port to these settings.
REQUEST FREQUENCY
Once per three seconds.
OPERATOR FUNCTIONS
Switches will be scanned every 1/10 second.
ERROR HANDLING
An error will be reported by flashing the
Communication OK light—the rate of flashing will be
indicative of the cause of the error.
1. No reply from generator control system—frequency
one second on/one second off.
2. Consecutive data errors—frequency 0.5 seconds
on/two seconds off.
HARDWARE WATCHDOG
Will reset the CPU if :
a. Supply voltage at CPU drops below 4.65VDC.
b. CPU activity stops for 15 seconds.
20-light Remote Annunciator
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