Software Specification - Generac Power Systems 000984-0 Owner's Manual

SYSTEM STATUS INDICATORS
These lamps are for Status indication only—the normal
condition is ON.
SYSTEM READY
Status light is dependent upon the following conditions
being true:
a. Generator must be set to 'Auto' mode.
b. Battery power (+12V or +24V) must be present (i.e.
low battery voltage lamp is off).
c. No alarm or pre-alarm condition exists.
COMMUNICATION OK
This light indicator is ON as long as there is proper
communication between the RAP and the D/E panel.
The light is turned OFF if the RAP does not receive a
valid RS485 response from the D/E panel defined as
either :
a. Three consecutive data requests from the RAP are
ignored.
b. Three consecutive data responses contain data
errors—string length or non valid characters.
When communication failure occurs, the RAP will flash
the Communication OK LED, and sound the Horn. The
rate of flashing will be indicative of the cause of the
error.
a. No reply from D/E panel-
frequency one sec on/one sec off.
b. Consecutive data errors -
frequency 0.5 sec on/two sec 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 continue
to flash until proper communication returns.
SPARE
The spare LED does not perform any function in a "D"
panel application, but it can be used in an "E" panel
application. To make the "E" panel connection, connect
to signal A4 (PRG INPT 4) which comes from the "E"
Panel Master Control Box CON1 pin 4.
When signal A4 is active, the Spare LED will flash and
can be reset or cleared in the same manner as the warn-
ing indicators described earlier. NOTE that the horn
will not sound.
AUDIBLE ANNUNCIATOR
See System Status Indicators chart for alarm occur-
rences.
20 Light Remote Annunciator
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 D/E panel 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. If the alarm no longer exists and it has also
been latched OFF at the D/E panel (Pre-Alarm indica-
tors only) the active light will go OFF . It will also silence
the horn and re-arm it for new alarm occurrences.
Pre-Alarm Conditions MUST be reset at the genera-
tor 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 D/E Panel. The D/E
panel returns an ASCII text string which represents the
status of the indicator lights on the panel display.
SERIAL INTERFACE
Default 4800,n,8,1
Auto-detect 2400, 9600bd.
REQUEST FREQUENCY
Once per three seconds.
OPERATOR FUNCTIONS
Switches will be scanned every 1/10 second.
ERROR HANDLING
An error will be
Communication OK light—the rate of flashing will be
indicative of the cause of the error.
a. No reply from D/E panel—frequency one sec on /
one sec off.
b. Consecutive data errors—frequency 0.5 sec on / two
sec off.
Note:
reported by flashing
Generac ® Power Systems, Inc.
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