Control Techniques Digitax ST - Page 101

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Parameter x.00
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Advanced parameter
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Digitax ST Advanced User Guide 101
Issue Number: 1 www.controltechniques.com
This input operates in voltage mode only where -9.8V and +9.8V at the input correspond with -100.0% and 100.0% respectively in this parameter.
These inputs can operate in different modes defined by Pr 7.11 and Pr 7.15.
In current modes (modes 0 to 5) the minimum and maximum current values given in mA correspond with 0.0% and 100.0% respectively in Pr 7.02
and Pr 7.03. Therefore in modes 2 and 4 the parameter is at 0.0% when the input current is less than 4mA, and in modes 3 and 5 the parameter is at
100.0% when the input current is less than 4mA.
In voltage mode (mode 6) -9.8V and +9.8V at the input correspond with -100.0% and 100.0% respectively in Pr 7.02 and Pr 7.03.
When analog input 3 is in thermistor mode (modes 7 to 9) the display indicates the resistance of the thermistor as a percentage of 10kΩ.
This parameter shows the highest IGBT package temperature.
This parameter shows the temperature of the main power board.
Three temperatures are available from the power circuit, and these are displayed in Pr 7.04, Pr 7.05 and Pr 7.36.
If the temperature displayed in Pr 7.04, Pr 7.05 or Pr 7.36 exceeds the trip threshold for the parameter, an Oht2 trip is initiated. This trip can only be
reset if the parameter that has caused the trip falls below the trip reset level. If the temperature exceeds the alarm level a "hot" alarm is displayed. If
the temperature for any of these monitoring points is outside the range -20°C to 150°C it is assumed that the monitoring thermistor has failed and a
hardware fault trip is initiated (Pr 7.04 - HF27, Pr 7.05 and Pr 7.36 - HF28).
Table 5-4 Power stage temperature 1 (Pr 7.04) in °C
Table 5-5 Power stack temperature 2 (Pr 7.05) in °C
7.01 T5/6 analog input 1 level
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
21 1 1
Range ±100.00 %
Update rate 4ms write
7.02 T7 analog input 2 level
7.03 T8 analog input 3 level
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
11 1 1
Range ±100.0 %
Update rate 4ms write
7.04 Power circuit temperature 1
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range
-128 to 127
o
C
Update rate Background write
7.05 Power circuit temperature 2
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range
-128 to 127
o
C
Update rate Background write
7.06 Control board temperature
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range
-128 to 127
o
C
Update rate Background write
Trip temperature Trip reset temperature Alarm temperature
77 72 75
Trip temperature Trip reset temperature Alarm temperature
83 78 80