IDEC SmartRelay functions
IDEC SmartRelay Manual
179
Setting the Par parameter
The gain and offset parameters are used to adapt the
sensors to the relevant application.
View in programming mode:
B3 1+
On
=+00000
Off =+00000
Parameter protection mode
On threshold
Off threshold
Press
B3 2
A
=00.00
B
=+00000
p
=0
Gain
Offset
Decimals in the message text
Example
In a heating control system, the supply T
v
and return line
temperatures T
r
are to be compared, for example with a
sensor at AI2.
A control signal is to be triggered (for example ”heater On”)
when the difference between the supply and return line
temperatures is greater than 15
. The control signal is reset
when the difference is less than 5
C.
The process variable of the temperature is to be shown in
parameter assignment mode.
The thermocouples available have the the following
technical data: -30 to +70
C, 0 to 10 VDC.
Application
Internal mapping
-30 to +70
C = 0 to 10 V DC
0 to 1000
0
C
300
Offset = -30
Range of values:
-30 to +70
C = 100
1000
Gain = 100/1000 = 0.1
On threshold = 15
C
Threshold = 15
Off threshold = 5
C
Threshold = 5
See also Chapter 4.3.6.
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