Forming Groups Of Temperature Sensors - Siemens SINAMICS S120 Function Manual

Monitoring and protective functions
8.5 Thermal motor protection
Example of 8 temperature channels:
2x2 conductors at terminal X531: p4108[0] = 1 ≙ sensor 1 is at channel 0 and sensor 2 is at
channel 6
2x2 wires at terminal X532: p4108[1] = 1 ≙ sensor 1 is at channel 1 and sensor 2 is at
channel 7
1x3 wires at terminal X533: p4108[2] = 2 ≙ sensor 1 is at channel 2
1x3 conductor is at terminal X534: p4108[3] = 2 ≙ sensor 1 is at channel 3
1x4 conductor is at terminal X535: p4108[4] = 3 ≙ sensor 1 is at channel 4
1x2 conductor is at terminal X536: p4108[5] = 0 ≙ sensor 1 is at channel 5
8.5.7.3

Forming groups of temperature sensors

You can combine the temperature channels to form groups using parameter p4111[0...2].
For each group, the following calculated values are provided from the temperature actual
values (r4105[0...11]):
● Maximum: r4112[0...2], (index 0,1,2 = group 0,1,2)
● Minimum: r4113[0...2]
● Average value: r4114[0...2]
Example:
The temperature actual value from channels 0, 3, 7, and 9 should be combined in group 1:
● p4111[1].0 = 1
● p4111[1].3 = 1
● p4111[1].7 = 1
● p4111[1].9 = 1
The calculated values from group 1 are available in the following parameters for
interconnection:
● r4112[1] = maximum
● r4113[1] = minimum
● r4114[1] = average value
Note
Forming groups of temperature channels
Only form groups of continuously measuring temperature sensors. The switching
temperature sensors PTC and bimetallic NC contacts are only assigned two temperatures -
50°C and +250°C, depending on the state. Within a group with continuous temperature
actual values, the calculation of the maximum/minimum/average value temperature is
significantly falsified by taking into account switching temperature sensors.
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Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Drive functions