Page
55
Alarms
P210, P220 =1 (Alarm)
The
second parameter
for each relay determines the
function
of the alarm.
P211, P221 - Relay Function
This parameter defines what
function
the
alarm
will respond to as follows.
Option
Description
0= Off (Default)
Relay will not operate.
1= Level
Alarm is based on the level in the vessel, and the
type of level alarm (P2
1
2, 2
2
2) and two setpoints
must be set (P2
1
3, 2
2
3 & P2
1
4, 2
2
4). Setpoints are
entered in Display Units as referenced to Empty
Level.
2= Temperature
Alarm is based on the temperature, and the type of
temperature alarm (P2
1
2, 2
2
2) and two setpoints
must be set (P2
1
3, 2
2
3 & P2
1
4, 2
2
4). The
temperature used depends on the temperature
source selected (P852). Setpoints are entered in
o
C.
3= Loss of Echo
Alarm is raised if the
Failsafe
Timer
(
P809
)
expires. No setpoints are required.
4= Loss of Clock
Alarm is raised if the real time clock fails. No
setpoints are required.
Note that the loss of echo and loss of clock will also be shown on the display
as “LOST ECHO” and “LOST CLOCK” respectively.
The
third parameter
for each relay determines the
alarm ID
for the relay
you wish to set.
P212, 222 - Relay Alarm ID
When P211, P221 = 3 (Loss of Echo) or 4 (Loss of Clock)
This parameter has no function and will not be displayed.
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