Rockwell Automation Publication 1444-UM001D-EN-P - June 2018 417
CIP Objects Appendix A
TX Power Setup
Following transducer power-supply options apply per transducer output.
Following transducer power-supply options apply per transducer input.
Within a channel pair, there are slight differences in the bias voltages
(noticeable on the positive bias, where it is of the order of 1.3 V). This behavior
is by design and has no effect on functionality.
Transducer OK Configuration
The Transducer OK status is based on the following checks.
For the Transducer Status to be “OK” the following must be true:
• The transducer DC/bias voltage must be within the configured OK
window limits (attributes 33/34)
• The channel must have passed an internal calibration check, at last
startup
Value Description
0OFF
1 CC (+24V / 4 mA constant current output)
2 +CV (+24V / 25 mA voltage regulated output)
3 -CV (-24V / 25 mA voltage regulated output)
To aid transducer failure detection the signal input circuitry imposes, in the absence of a functioning transducer, a
bias voltage at the input. The bias that is applied is automatically selected based on the power supply that is
configured for that channel.
Value Description
0 OFF - Bias Off (typically around 1.7 V DC at the input)
1 CC - Bias Negative (typically around -3.9 V DC at the input)
2 +CC - Bias Negative (typically around -3.9 V DC at the input)
3 -CV - Bias Positive (typically around 13 V DC at the input)
0 automatic (all relevant checks included)
1 wire-off monitoring that is excluded (any value in range 1 to 7 is treated the same)
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