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IDEC SMARTRELAY

IDEC SMARTRELAY
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IDEC SmartRelay functions
4.4 Special functions list - SF
IDEC SmartRelay Manual
186
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 C. 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 following technical data: -30 C to 70 C, 0 VDC to 10
VDC.
Configuration (example):
View in parameter assignment mode (example):
View in the message text (example):
Application Internal mapping
-30 C to 70 C  0 VDC to 10 VDC 0 to 1000
0 C 300
Offset  -30
Range of values:
-30 C to 70 C  100
1000
Gain  100/1000  0.1
On threshold  15 C Threshold  15
Off threshold  5 C Threshold  5
See also topic Calculating the gain and offset of analog values (Page 126).
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Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com

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