IDEC FL1E SmartRelay - Manual (Page 193)

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.