Setting The [Limit Values]; Function Of The Limit Values - ProMinent DULCOMETER diaLog DACb Assembly And Operating Instructions Manual

14 Setting the
Limit values
Limit value channel 1
Fig. 96: Setting the [Limit values]
14.1

Function of the limit values

[Limit values]
User qualification: trained user, see
n
fication' on page 16
Continuous display ➨
[Limit values]
Measuring channel settings
This descriptions of [Channel 1] apply correspond‐
ingly to the settings in all other measuring chan‐
nels. The procedure for entering the settings for
the channel in question is identical, however the
parameters to be set may differ. Your attention is
drawn to the differences, which are also described.
The limit values are not related to the control setpoint.
The limit values are continuously compared with the measured
value.
The limit values are values that can be set within the measuring
range of a measured variable. For each measuring channel a Limit
[1] can be set for exceeding, i.e. the measured value is greater
than the limit value and a Limit
the measured value is less than the limit value. As the controller
only has two limit value relays, there is an option of selecting a limit
'range' . An upper and lower limit are set as a limit value
value
'range' . If the measured value is above or below the 'range' , then
a limit value transgression exists.
If the limit is exceeded for longer than the
[Control time lim. val. (∆t on)] , then an error message is triggered
that has to be acknowledged and the alarm relay is deactivated. If
[controller] is also set to [OFF] then the control process stops.
the
[Lower lim] means that the limit criterion has been transgressed by
undershooting of the lower limit.
[High limit] means that the limit criterion has been transgressed by
exceeding of the upper limit.
Setting the
Ä Chapter 2.4 'User quali‐
[Limit values] ➨
➨ or
4.1
A1011
[2] can be set for undershooting, i.e.
[Limit values]
131