Parameter
structure
Keypad and
display
Parameter x.00
Parameter
description format
Advanced parameter
descriptions
Serial comms
protocol
Electronic
nameplate
Performance
Menu 7
Digitax ST Advanced User Guide 107
Issue Number: 1 www.controltechniques.com
In addition to monitoring the IGBT junction temperatures the drive includes a thermal protection system to protect the other components within the
drive. This includes the effects of drive output current and DC bus ripple. The estimated temperature is displayed as a percentage of the trip level in
this parameter. If the parameter value reaches 100% an Oht3 trip is initiated.
This parameter shows the temperature of the rectifier heatsink. See 7.04, 7.05 and 7.06 on page 101.
Drive size
Threshold for reducing the
switching frequency or Oht1 trip
o
C
DST1201 145
DST1202 145
DST1203 145
DST1204 145
DST1401 145
DST1402 145
DST1403 145
DST1404 170
DST1405 170
7.35 Drive thermal protection accumulator
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
11 1 1 1
Range 0 to 100 %
Update rate Background write
7.36 Power circuit temperature 3
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range -128 to 127 °C
Update rate Background write
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