Rievtech x-Messenger Series - Page 274

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6.5.24 Analog value monitoring
Short description
This special function saves the process variable of an analog input to memory, and sets the output when the
output variable exceeds or drops below this stored value plus a configurable offset.
Parameter p (number of decimals)
The two threshold parameters Threshold 1 and Threshold 2 can be provided by the actual value of another
already-programmed function:
Analog comparator: Ax – Ay
Analog trigger: Ax
Analog amplifier: Ax
Analog multiplexer: AQ
Analog ramp: AQ
Analog math: AQ
Connection
Description
Input En
A positive edge (0 to 1 transition) at input En saves
the analog value at input Ax ("Aen") to memory and
starts monitoring of the analog range Aen ± Delta.
Input Ax
You apply the analog signal to be monitored at input
Ax.
Use the analog inputs AI1...AI8, the analog
outputs AQ1 and AQ2.
0 - 10 V is proportional to 0 - 1000 (internal value).
Parameter
A: Gain
Range of values: ± 10.00
B: Zero offset
Range of values: ± 10,000
Delta: Difference value for the Aen on/off threshold
Range of values: ± 20,000
p: Number of decimals
Range of values: 0, 1, 2, 3
Output Q
Q is set/reset, depending on the stored analog value
and the offset.