Rockwell Automation 900-TC32 Digital Temperature Controllers, Series B - Manual (Page 198)

Publication 900-UM007D-EN-E - January 2011
4-62 Parameter Adjustments & Application Considerations
Using the Transfer Output Transfer Output Function
Fort 900-TC8 and 900-TC16, if a control 1 output is an analog linear current
output it can be used as a transfer output. To use the transfer output, configure
the Transfer Output Type parameter to any setting other than OFF (refer to
Table 4.AE).
When the Transfer Output Type parameter is configured to any setting other
than OFF, the Transfer Output Upper-Limit and Transfer Output
Lower-Limit parameters will be enabled.
Transfer Output Type
➊ The default Transfer Output Type is OFF. If the Transfer Output Type is configured to OFF, the function assigned
in the Control Output 1 Assignment parameter will be output to Control Output 1.
➋ The difference between the transfer output value and the linear current output value is illustrated in the
following example and Figure 4.135.
If the linear output is used as the transfer output when the linear current output type is configured to 4…20
mA, 4.0 mA will be output for 0% and 20.0 mA will be output for 100%.
When a linear output is used for the control output, 3.7 mA is output for 0% and 20.3 mA is output for 100%
when the control output for heating is selected to ensure that the control object is controlled at 0% and 100%.
Figure 4.135 — When the Linear Current Output Type is Set to 4 to 20 mA
Table 4.AE — Using Transfer Input
Transfer Output Type Symbol Configurable Range
OFF
➊ off
—
Set Point
sp
SP Lower-Limit to SP Upper-Limit
Set Point during SP
ramp
sp-m
SP Lower-Limit to SP Upper-Limit
PV
pv
Sensor setting range Lower-Limit to
Sensor setting range Upper-Limit or
Scaling Lower-Limit to Scaling
Upper-Limit
MV Monitor (heating)
mv
–5.0…105.0 (heating/cooling control:
0.0…105.0)
➋
MV Monitor (cooling)
c-mv
0.0…105.0
➋
20.3
20
4
3.7
0
100
Output current (mA)
Transfer output value
Control output
MV (%)