Control Techniques Digitax ST Advanced User's Manual page 101

Parameter Keypad and
Parameter x.00
structure display
7.01 T5/6 analog input 1 level
Bit SP
Coding
Range ±100.00 %
Update rate 4ms write
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.
7.02 T7 analog input 2 level
7.03 T8 analog input 3 level
Bit SP
Coding
Range ±100.0 %
Update rate 4ms write
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.
7.04 Power circuit temperature 1
Bit SP
Coding
o
Range
-128 to 127
Update rate Background write
This parameter shows the highest IGBT package temperature.
7.05 Power circuit temperature 2
Bit SP
Coding
o
Range
-128 to 127
Update rate Background write
This parameter shows the temperature of the main power board.
7.06 Control board temperature
Bit SP
Coding
o
Range
-128 to 127
Update rate Background write
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
Trip temperature Trip reset temperature
77
Table 5-5 Power stack temperature 2 (Pr 7.05) in °C
Trip temperature Trip reset temperature
83
Digitax ST Advanced User Guide
Issue Number: 1
Parameter
description format
FI DE Txt VM DP ND
2 1
FI DE Txt VM DP ND
1 1
FI DE Txt VM DP ND
1
C
FI DE Txt VM DP ND
1
C
FI DE Txt VM DP ND
1
C
Alarm temperature
72 75
Alarm temperature
78 80
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Advanced parameter Serial comms
descriptions protocol
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1
Electronic
Performance
nameplate
PS
PS
PS
PS
PS
Menu 7
101