IDEC SmartRelay functions
IDEC SmartRelay Manual
109
4.3.5
Parameter protection
In the parameter protection settings, you can determine
whether the parameters can be displayed and edited in
IDEC SmartRelay parameter assignment mode or not. Two
options are available:
+
: The parameter attribute permits read/write access in pa-
rameter assignment mode (default).
–
: The parameter settings are read/write protected in param-
eter assignment mode, and can be edited only in the pro-
gramming mode. See the example on Page 74.
4.3.6
Calculating the gain and offset of analog val-
ues
A sensor is connected to the analog input and converts a
process variable into an electrical signal. This value of signal
lies within the typical range of this sensor.
IDEC SmartRelay always converts the electrical signals at
the analog input into digital values from 0 to 1000.
A voltage of 0 to 10V at input AI is transformed internally into
range of values from 0 to 1000. An input voltage exceeding
10V is shown as internal value 1000.
Because you can not always process the range of values
from 0 to 1000 as predetermined by IDEC SmartRelay, you
can multiply the digital values by a gain factor and then shift
the zero of the range of values (offset). This allows you to
output an analog value to the IDEC SmartRelay display,
which is proportional to the actual process variable.
Parameter
Minimum
Maximum
Input voltage (in V)
0
≥
10
Internal value
0
1000
Gain
00.00
10.00
Offset
-10000
+10000
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