CAT EMCP 4 - Page 59

Application and Installation Guide EMCP 4 SCADA Data Links
©2013 Caterpillar
All rights reserved. Page 55
#4 En
g
ine Oil Tem
p
erature Sensor Short Hi
g
h
SPN 175, FMI 3 Present, Occurrences: 9
last: Januar
y
16, 2007 09:16:46. 0 hrs
first: **** 0, 1985 00:00:00. 0 hrs
#5 En
g
ine Coolant Tem
p
erature Sensor Short Hi
g
h
SPN 110, FMI 3 Present, Occurrences: 9
last: Januar
y
16, 2007 09:16:46. 0 hrs
first: **** 0, 1985 00:00:00. 0 hrs
#6 En
g
ine Oil Pressure Sensor Short Hi
g
h
SPN 100, FMI 3 Present, Occurrences: 9
last: Januar
y
16, 2007 09:16:45. 0 hrs
fi
r
st: **** 0, 1985 00:00:00. 0 hrs
7.10 READING AND INTERPRETING ALARM GROUP DATA
Registers 342-356 contain alarm information in a simpler format than the event log information described in
section 7.9. These registers contain only alarm active statuses represented by individual bits within each
register. These registers also serve as indication of the alarm status of the RS-485 Annunciator modules. In
fact, the RS-485 Annunciator modules are configurable to select between one of four alarm groups. Groups
1 and 2 are configurable via Cat ET, whereas Groups 3 and 4 are fixed. Likewise, the Alarm Group 1 and
Alarm Group 2 registers are defined by the RS-485 Annunciator configuration in Cat ET. There is some
flexibility in how to configure Alarm Groups 1 and 2 in order to read desired alarm information.
In this section, examples of both using the user-configurable and the fixed alarm groups are be given. For
the purpose of these examples, let’s say that Alarm Group 1 is being used by existing RS-485
Annunciator modules; therefore we wish to use Alarm Group 2.
NOTE: the same configuration is used for configuring the SCADA Alarm Groups 1 and 2,
and for RS-485 Annunciator configuration. Therefore, care should be taken to avoid
misconfiguring the RS-485 Annunciator.
CONFIGURING AND READING CONFIGURABLE ALARM GROUP DATA
Suppose we wish to annunciate, and turn on an audible alarm, when we get the following alarms:
1. Low fuel level warning
2. Engine underspeed warning
3. Engine underspeed shutdown