Table of Contents
Advertisement
Programming
5.7 Blocks for analog value functions
Parameters
Input
Function parameters
Limit value
Function
Amount of difference
Output parameters
Output
See also
Limit value switch (Page 220)
5.7.4
Analog value comparator
Function
The values of two analog inputs are compared by forming the difference. If the difference of
two programmable limit values is overshot or undershot, a digital output signal is set.
224
Tag type / range of
Description
values
The value of the input is monitored for the limit
Analog input / bit
•
value and a threshold value by the block.
memory
Event counter /
•
usage meter
3.402823 e-38 ..
Limit value to be monitored (absolute value)
3.402823 e+38
The parameter is included in the calculation of the
Max. 19 characters,
threshold value.
max. 4 decimal plac-
es.
The parameter is included in the calculation of the
+ (Window)
•
threshold value and decides the functionality of the
- (Hysteresis)
•
block:
•
•
For information on inverting the input signal see
above.
0 ... 3.402823e+38
Amount of the difference value
Max. 19 characters,
The parameter is included in the calculation of the
display of max. 4
threshold value.
decimal places
Digital output / bit
Tag in which the value calculated by the block is
memory
output.
+ (Window)
Output set to 1 when the input signal is within
the window between limit value and threshold
value.
- (Hysteresis)
When the input signal exceeds the "Limit value"
the output is set to 1.
When the input signal falls below the threshold
value the output is set to 0.
Operating Instructions, 09/2017, C79000-G8976-C382-04
RTU3030C
Advertisement
Table of Contents
