IDEC SmartRelay functions
IDEC SmartRelay Manual 177
4.4.18 Analog comparator
Short description
The output is set and reset depending on the
difference Ax -
Ay and on two configurable thresholds.
Gain and offset parameters
For more information on the gain and offset parameters,
re
fer to Chapte
r 4.3.6.
Parameters On and Off
The on threshold On and the off threshold Off can be
pr
ovided
by the actual value of another already-programmed
function. You can use the actual values of the following
functions:
• Analog comparator (actual value Ax - Ay, see Chapter
4.4.18)
• Analog trigger (actual value Ax, see Chapter 4.4.16)
• Analog amplifier (actual value Ax, see Chapter 4.4.20)
• Analog multiplexer (actual value AQ, see Chapter 4.4.26)
• Analog ramp control (actual value AQ, see Chapter
4.4.27)
• Analog math (actual value AQ, see Chapter 4.4.30)
• PI controller (actual value AQ, see Chapter 4.4.28)
• Up/down counter (actual value Cnt, see Chapter 4.4.13)
Select the required function by the block number.
Symbol in IDEC
SmartRelay
Wiring Description
Inputs Ax
and Ay
You apply the analog signals the
difference of which you want to
analyze at the inputs Ax and Ay.
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
On: On threshold
Range of values: 20,000
Off: Off threshold
Range of values: 20,000
p: Number of decimals
Range of values: 0, 1, 2, 3
Output Q Q is set or reset, depending on the
difference Ax - Ay and the set
thresholds.
* AI1...AI8: 0...10 V corresponds with 0...1000 (internal value).
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