(H) Protective function parameter
Parameters
5 - 310
PTC thermistor input (Pr. 561, Pr. 1016, E.PTC)
●
Output from the PTC thermistor, which is built into the motor, can be input to the terminals 2 and
10. If the input from the PTC thermistor reaches the resistor value set in Pr. 561 "PTC thermistor
protection level", the PTC thermistor operation (E.PTC) shuts off the inverter output.
●
Confirm the characteristic of the PTC thermistor to be used, and set the resistance for Pr. 561
around the center of the R1 and R2 values shown on the figure above so that it does not deviate
from the protective function activating temperature TN. If the Pr. 561 setting becomes too close
to R1 or R2, the protective function activating temperature may be too hot (protection is delayed),
or too cold (too much protection).
●
When the PTC thermistor protection is enabled (Pr. 561 ≠ "9999"), the resistance value for the PTC
thermistor can be displayed on the operation panel or via RS-485 communication. (Refer to page
5-344.)
Fig. 5-128:
PTC thermistor input connection diagram
I002584E
I002585E
Fig. 5-129:
Example of PTC thermistor characteristics
U
V
W
10
2
Motor
Inverter
R2
R1
TN
TN+DT
TN-DT
Thermistor resistance
Thermistor curve
Thermistor temperature
TN: Rated operating temperature
Temperature – resistance
existing range
Pr. 561
Summary of Contents for FR-A820-00046 (0.4K)
Page 2: ......
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Page 144: ...System configuration for Ethernet communication FR A800 E Installation and wiring 2 114 ...
Page 202: ...Basic operation procedure JOG operation Basic operation 4 32 ...
Page 1090: ...Check first when you have a trouble Protective functions 6 50 ...
Page 1189: ...Appendix EC Declarations of Conformity FR A800 A 49 ...
Page 1190: ...EC Declarations of Conformity Appendix A 50 ...
Page 1191: ...Appendix EC Declarations of Conformity FR A800 A 51 ...
Page 1192: ...EC Declarations of Conformity Appendix A 52 ...
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Page 1194: ...EC Declarations of Conformity Appendix A 54 ...
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Page 1196: ...EC Declarations of Conformity Appendix A 56 ...
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Page 1210: ...EC Declarations of Conformity Appendix A 70 ...
Page 1211: ...Appendix EC Declarations of Conformity FR A800 A 71 ...
Page 1212: ...EC Declarations of Conformity Appendix A 72 A 7 2 FR A846 series ...
Page 1213: ...Appendix EC Declarations of Conformity FR A800 A 73 ...
Page 1214: ...EC Declarations of Conformity Appendix A 74 ...
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