Functions, monitoring, and protective functions
9.4 Monitoring and protective functions
Inverter chassis units
Operating Instructions, 07/2016, A5E00331449A
493
Forming groups of temperature sensors
Using p4111[0...2], temperature channels can be combined to form groups. 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 gr
oups of continuously measuring temperature sensors. Depending on the status,
the switching temperature sensors PTC and bimetal NC contacts are only assigned two
temperatures
- 50 °C and +250 °C.
Within a group with continuously measuring temperature senso
rs, the calculation of the
maximum/minimum/average values, is significantly falsified when taking into account
switching temperature sensors.
Evaluating temperature channels
For each of the individual 12 temperature channels, using p4102[0...23] an alarm threshold
and a fault threshold can be set (straight parameter indices: Alarm thresholds, odd
parameter indices: Fault thresholds). The temperature thresholds can be set for each
channel from -99 °C to +251 °C. For p4102[0...23] = 251, the evaluation of the corresponding
threshold is deactivated.
Using p4118[0...11], for each channel a hysteresis for the fault/alarm thresholds can be set
in p4102[0...23].
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