68 Rockwell Automation Publication 5000-UM005B-EN-P - November 2015
Chapter 4 Current/Voltage/Temperature-sensing Analog Input Module Features (5069-IY4)
Sensor Offset
The Sensor Offset compensates for any known error on the sensor or channel to
which the sensor is connected. The value is set in signal units and is added to the
data value.
For example, consider an application that uses the Current (mA) input type with
the 4…20 mA range and scaling at 0…100%. If a sensor has an error and the
channel consistently reports current signal values by 0.2 mA lower than the actual
value, you must set Sensor Offset to 1.25%.
You must use the O.Chxx.SensorOffset tag to set the Sensor Offset. In the example
above, the O.Chxx.SensorOffset tag = 1.25.
For more information on using module tags, see Appendix B,
Module Tag
Definitions on page 133.
10 Ohm Copper Offset
With 10 Ohm Copper Offset, you can compensate for a small offset error in a
10 ohm copper RTD. The channel must be connected to the 10 Ohm CU 427
Sensor Type to use this feature. The offset value is indicated in units of
0.01 Ohm.
For example, if the resistance of a copper RTD used with a channel is 9.74 Ω at
25 °C, the 10 Ohm Copper Offset lets you account for the error. You must set the
10 Ohm Copper Offset field on the Configuration tab to -0.26 or by setting the
C.Chxx.Te nOhmOffset to -26.
To see where to set the 10 Ohm Copper Offset on the 5069-IY4 module, see
page 96.
To Next Page
Loading...
Need help?
General
