Temperature Sensor; Application And Setting Notes - Siemens 6MD85 Manual

5.7.7.5

Temperature Sensor

Logic
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Figure 5-79
Measured Temperature Value
The Temperature sensor function block processes one single measured temperature value delivered from the
RTD unit for the assigned sensor. 12 temperature sensor function blocks are always available in each RTD unit
function (both via Ethernet and serial), even if fewer sensors are connected to the RTD unit.
Various temperature sensor types are supported: Pt100, Ni100, and Ni120 sensors. The function block is noti-
fied regarding the selection of connected type via the Sensor type parameter.
The function block delivers a measured temperature value in °C or °F as an output variable. The measured
temperature value is available as an operational measured value and can be monitored by the Temperature
supervision function.
Error Responses
If the measured input value is determined to be incorrect, the quality attribute of the output measured
temperature value is set to
the following table:
Table 5-11
Error Description
Sensor or line short circuited
Sensor or line interrupted
Measured temperature value
outside the valid measuring range
specified in the technical data. The
valid measuring range depends on
the sensor type.
Sensor not connected
5.7.7.6

Application and Setting Notes

Parameter: Sensor type
•
Default setting (_:11611:102) Sensor type = Pt 100
The Sensor type parameter is used to set the sensor element used. You can select between Pt 100, Ni
100 and Ni 120.
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
Logic Diagram of the Temperature Sensor Function Block
invalid . The statuses for Health and Error take the statuses in accordance with
Error response
Health Status
Alarm
Alarm
Alarm
OK
Function-Group Types
5.7 Function-Group Type Analog Units
Error Status
Yes
Yes
Yes
No
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