Micom P631, Technical Manual, Page: 108 / 638

3.10.3 Analog Measured Data Output
Analog output of measured data is two-channel.
The user can select two of the measurands available in the P631 for output in the
form of load-independent direct current. Three interpolation points per channel
can be defined for specific adjustments such as adjustment to the scaling of a
measuring instrument. The direct current that is output is displayed as a
measured operating value.
The selected measurand is output as direct current for the duration of the set
hold time MEASO: Hold time output A-1. If the selected variable was not
measured, then there is no output of a measurand value.
3.10.3.1 Output of Measured Event Values
If the measured event value is updated during the hold time, the measurand
output memory is cleared and the hold time is re-started. This leads to an
immediate availability at the output of the updated value.
3.10.3.2 Output of Measured Operating Values
The selected measured operating value is available for the duration of the set
hold time. After the hold time has elapsed, the current value is saved and the
hold time is re-started. If the hold time has been set to
blocked , the measured
operating value that has been output will be stored until the measured data
output function is reset.
3.10.3.3 Configuration of Output Relays Assigned to the Output Channels
The user must keep in mind that direct current output only occurs when the
output relays assigned to the output channels are configured for MEASO: Value
A-1 output, since the output channels would otherwise remain short-circuited
(see the terminal connection diagrams at the end of
Chapter 5, (p. 5-1) ).
3.10.3.4 Scaling the Analog Display
In order to define the resolution for measured data output the measurand range
in scaled form and the associated display range have to be set. One additional
value for the knee point must also be defined. In this way the user can obtain an
analog output characteristic similar to the characteristic shown in
Fig. 3-35, (p. 3-
56) .
3.10.3.5 Measurand Range to be Output
The measurand range to be output is (Mx,min ... Mx,knee ... Mx,max), with:
●
Mx,min: minimum value to be output
●
Mx,knee: Knee-point value for the measurand range to be output
●
Mx,max: maximum value to be output
This measurand range to be output is defined by setting the following
parameters:
●
MEASO: Scaled min. val. A-1 or MEASO: Scaled min. val. A-2,
resp.
●
MEASO: Scaled knee val. A-1 or MEASO: Scaled knee val. A-2,
resp.
●
MEASO: Scaled max. val. A-1 or MEASO: Scaled max. val. A-2,
resp.
Scaling is made with reference to the complete range of values for the selected
measurand (variable Mx). The complete range of values is defined by their end
P631 3 Operation
3-52 P631/EN M/R-11-C // P631-310-650