Precision Digital PD650 - Manual (Page 54)

Model PD650 Large Display Process Meter Instruction Manual
54
Programming Alarm Points and Presets (SEtPtS)
Overview
The SEtPtS menu is used to program the following functions:
1. Set and reset points for alarms assigned to process/rate (thus determining
high or low alarm status and deadband).
2. Preset values for set points assigned to total
3. Preset offset values for set points assigned to total with OFFSET selected
Set and Reset Points for Process/Rate Alarms
The meter can be programmed so any alarm point that is assigned to
process/rate can be set for a high or low alarm. In addition, any process/rate
alarm point can be programmed for 0-100% deadband. A process/rate alarm is
programmed for a high alarm, by programming the set point at a higher value
than the reset point. Conversely, a process/rate alarm is programmed for a low
alarm, by programming the set point at a lower value than the reset point.
Example: To program an alarm for a high alarm at 500, with 100 counts of
deadband program set and reset points as follows:
Set point: 500
Reset point: 400
Preset Values for Total Set Points
When a set point is assigned to total, a preset value at which the relay will trip
must be programmed. Unlike set points assigned to process/rate, which require a
set and reset point, set points assigned to total require only a preset value. When
the preset value is reached, the relay transfers. The relay can be programmed to
reset automatically or manually.
Preset Offset Values for Total Set Points (OFFSET)
A preset offset value can be assigned when two adjacent set points are assigned
to total and the second one has been assigned to OFFSET during Setup above.
The first relay of a pair will trip at a programmed preset offset value below the
second relay’s preset value.
Example: If the preset offset value is set at 10 then the first relay will trip at 10
counts before the second relay trips.
In the above example the relay pair combination could be 1 & 2, 2 & 3, or 3 & 4.