IDEC FL1E SmartRelay - Manual (Page 196)

IDEC SmartRelay functions
182 IDEC SmartRelay Manual 
4.4.19 Analog watchdog
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.
Gain and offset parameters
For more information on gain and offset parameters, refer to
Chapter 4.3.6.
Parameters Delta1 and Delta2
The Delta1 and Delta2 parameters can be provided by the
actual value of another already-programmed function. You
can use the actual value of the following functions:
Symbol in IDEC
SmartRelay
Wiring 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 -

2
to Aen+ 
1
Input Ax You apply the analog signal to be
monitored at input Ax.
Use the analog inputs AI1...AI8
( * ) , the
analog memory markers AM1...AM6,
the block number of a function with
analog output, or the analog outputs
AQ1 and AQ2.
Parameter A: Gain 
Range of values: 10.00
B: Zero offset 
Range of values: 10,000

1
: Difference value above 
Aen: on/off threshold 
Range of values: 0-20,000

2
:
Difference value below 
Aen: on/off threshold 
Range of values: 0-20,000
p: Number of decimals 
Range of values: 0, 1, 2, 3
Retentivity:
/ = No retentivity
R = The status is retentive in memory
Output Q Q is set/reset, depending on the
stored analog value and the offset.
* AI1...AI8: 0...10 V corresponds with 0...1000 (internal value).