PLATINUM
TM
Series Controllers User
’s
Guide
M5451
Omega Engineering | www.omega.com
29
Reference Section: Initialization Mode (INIt)
6.1.4
Process Input Type Configuration (INIt > INPt > PRoC)
Select Process (
PRoC
) as the input type. Then select the process input range and scale it. If
stopped after selecting the
PRoC
input type, the last selected input range and scaling is used.
Navigate to the voltage or current range of the process input. Any signal input outside of the
specified hardware input range will result in an “out
-of-
range” error
(code E009). Input range
choices include the following:
4
–
20
–
4 mA to 20 mA (factory default)
0
–
24
–
0 mA to 24 mA
+
–
10
–
-10 V to +10 V
+
–
1
–
-1 V to +1 V
+
–
0.1
–
-100 mV to +100 mV
+
–
.05
–
-50 mV to +50 mV
Select the desired range.
The (
tYPE
) option is only displayed for +- 1.0, +-0.1 and +- .05 inputs
and allows selecting
between Single Ended, Differential and Ratiometric inputs. The +- .05 input only supports
dIFF
and
RtIo
input types.
SNGL
–
Bipolar Single Ended voltage between A+ and ARTN connections
dIFF
–
Differential voltage between A+ and A- connections
RTIo
–
Ratiometric reading between A+ and A- connections.
Select the desired type.
Choose either manual or live scaling. The scaling functions translate process values to
engineering units and are available for all process input ranges. The defaults for each input
range are the hardware minimum and maximum. Scaling methods include the following:
MANL
–
User manually enters all four scaling parameters
LIVE
–
User manually enters the low and high display values (
RD.1
and
RD.2
) but
reads the input signal directly to set the low and high input values (
IN.1
and
IN.2
)
Using either MANL or LIVE to set up scaling, scaled values are then calculated as:
Scaled Value = Input * Gain + Offset, where:
Gain = (
Rd.2
–
Rd.1
) / (
IN.2
–
IN.1
)
Offset =
Rd.1
–
(Gain *
IN.1
)
Therefore scaling can be done over a subset of the applicable range as this scaling calculation
linearly extrapolates in both directions.
Select the scaling method to be used.
