Emerson E300 Series - Page 285

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E300 Design Guide 285
Issue Number: 1
Encoder Thermistor Type (F69) defines the operating mode of the P1 thermistor input.
If a device is connected between the pin 15 of the encoder interface and 0 V a current source will pass 0.8 mA through the device with a maximum
voltage of approximately 3.8 V (i.e. maximum resistance of approximately 4750 Ohms). The resistance of the device is calculated and displayed in
Encoder Thermistor Feedback (F72). If Encoder Thermistor Type (F69) is set to select KTY84 the temperature is also calculated and written to
Encoder Thermistor Temperature (F73). Note that DIN44082 mode and 0.8 mA mode operate in exactly the same way.
See F74 Motor Thermistor Input Select.
See F74 Motor Thermistor Input Select.
See Encoder Thermistor Type (F69).
See Encoder Thermistor Type (F69).
Value Text
0 DIN44082
1KTY84
20.8mA
Encoder Thermistor Type
(F69)
Compatible devices
0: DIN44082
Three thermistors in series as specified in
DIN44082 standard
1: KTY84 KTY84 PTC thermistor
2: 0.8mA Any device
F70 Encoder Thermistor Trip Threshold
Mode Open-Loop, RFC-A, RFC-S
Minimum 0 Maximum 5000
Default 3300 Units Ω
Type 16 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 0
Coding RW
F71 Encoder Thermistor Reset Threshold
Mode Open-Loop, RFC-A, RFC-S
Minimum 0 Maximum 5000
Default 1800 Units Ω
Type 16 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 0
Coding RW
F72 Encoder Thermistor Feedback
Mode Open-Loop, RFC-A, RFC-S
Minimum 0 Maximum 5000
Default Units Ω
Type 16 Bit Volatile Update Rate Background write
Display Format Standard Decimal Places 0
Coding RO, ND, NC, PT
F73 Encoder Thermistor Temperature
Mode Open-Loop, RFC-A, RFC-S
Minimum -50 Maximum 300
Default Units °C
Type 16 Bit Volatile Update Rate Background write
Display Format Standard Decimal Places 0
Coding RO, ND, NC, PT