Delta Tau GEO BRICK DRIVE 用户手册
Geo Brick Drive User Manual
Drive Structure and Troubleshooting
267
Reading IGBT Temperature and Bus Voltage
IGBT Temperature reading:
The baseline IGBT temperature is set at 25°C (77°F), with ADC bits [11-4] value of $21 (Hexadecimal).
Above the baseline temperature, every additional 2.13°C (3.834°F) correspond to $1 hexadecimal ADC
count. The maximum IGBT temperature for the Geo Brick Drive is about 125°C (257°F), or $5B
Hexadecimal ADC counts.
Bus Voltage reading:
Every ADC $1 Hexadecimal count corresponds to 5.875 Volts DC. See electrical specifications for over-
voltage, shunt resistor turn-on,
The following, is an example PLC that updates the DC Bus Voltage (converted to AC) every 3 seconds,
and Axis-1 IGBT temperature in degree Celsius every 30 seconds:
The baseline IGBT temperature is set at 25°C (77°F), with ADC bits [11-4] value of $21 (Hexadecimal).
Above the baseline temperature, every additional 2.13°C (3.834°F) correspond to $1 hexadecimal ADC
count. The maximum IGBT temperature for the Geo Brick Drive is about 125°C (257°F), or $5B
Hexadecimal ADC counts.
Bus Voltage reading:
Every ADC $1 Hexadecimal count corresponds to 5.875 Volts DC. See electrical specifications for over-
voltage, shunt resistor turn-on,
The following, is an example PLC that updates the DC Bus Voltage (converted to AC) every 3 seconds,
and Axis-1 IGBT temperature in degree Celsius every 30 seconds:
End Gat
Del Gat
Close
// Substitutions and definitions
#define IC0StrobeWord
Del Gat
Close
// Substitutions and definitions
#define IC0StrobeWord
I7006 ; Servo IC#0 ADC Strobe Word
#define Mtr1ADCB
M7050 ; Motor 1 ADC Phase B
#define ACBusVoltage
M7051 ;
#define LastIC0Strobe
P7050 ;
#define CS1Timer1
I5111 ; Coordinate System &10 Countdown Timer 1
#define CS1Timer2
I5112 ; Coordinate System &10 Countdown Timer 2
#define IGBTAxis1Temp
M7054 ;
#define BaselineTemp
P7052 ;
#define TempConstant
P7053 ;
#define AmbientTemp
P7054 ;
Mtr1ADCB->Y:$78006,4,8
; Channel 1 ADC Phase B
ACBusVoltage->*
; Self-referenced M-variable to store Bus Voltage reading
IGBTAxis1Temp->*
; Self-referenced M-variable to store IGBT Temperature reading
LastIC0Strobe= 0
; 0 at download
IGBTAxis1Temp= 0
; 0 at download
BaselineTemp= 33
; $21 at 25 Degree Celsius
TempConstant= 2.13
; 2.13 Degrees C for each additional Hex Count
AmbientTemp= 25
; Ambient at 25 degrees Celsius
// This PLC example updates AC Bus Voltage reading (M7051) every 3 seconds and
// Axis-1 IGBT Temperature reading (M7054) in degree Celsius every 30 seconds
Open plc 1 clear
If (CS1Timer2<0)
; Read IGBT Temperature
IC0StrobeWord = $300FFF
; Set Strobe Word for Enhanced Mode, IGBT Temperature
CS1Timer2=50*8388608/I10 While(CS1Timer2>0) Endw ; 50 msec Delay
IGBTAxis1Temp=(Mtr1ADCB-BaselineTemp)* TempConstant+ AmbientTemp
CS1Timer2=30000*8388608/I10 ; 30 sec IGBT Temperature Update
EndIF
// AC Bus Voltage (M7051)
If (LastIC0Strobe != IC0StrobeWord)
IGBTAxis1Temp=(Mtr1ADCB-BaselineTemp)* TempConstant+ AmbientTemp
CS1Timer2=30000*8388608/I10 ; 30 sec IGBT Temperature Update
EndIF
// AC Bus Voltage (M7051)
If (LastIC0Strobe != IC0StrobeWord)
IC0StrobeWord = $301FFF; Set ADC Strobe Word for Enhanced Mode, Bus Voltage
LastIC0Strobe = IC0StrobeWord
CS1Timer1= 50*8388608/I10 While(CS1Timer1>0) Endw ; 50 msec Delay
EndIf
ACBusVoltage=(Mtr1ADCB*5.875)/sqrt(2)
ACBusVoltage=(Mtr1ADCB*5.875)/sqrt(2)
; Convert to AC
CS1Timer1= 3000*8388608/I10 While(CS1Timer1>0) Endw ; 3 sec Bus Voltage update
Close
Close
Note
Toggling the ADC Strobe Word at a very fast rate is not desirable.
Handshaking between the PMAC and the amplifier processor may
take to up to 50 milliseconds.
Handshaking between the PMAC and the amplifier processor may
take to up to 50 milliseconds.