In transducer application, to because electric current or exterior reason bring about overheat and be damaged too,prevent electric machinery, the temperature of set electric machinery protects a function. Be worth certainly more than when the temperature of electric machinery namely when, transducer tripping operation (OFF2) . Normally the circumstance falls, temperature protection has the following two kinds of means: When the temperature model that adopts electric machinery undertakes to electric machinery; becomes us to undertake be debugginged quickly to transducer protective, transducer is met according to electric machinery relevant parameter, if the parameter such as power, electric current comes,build model of electric machinery temperature. To electric machinery of Xi Menzi standard, data of electric machinery model is more accurate, but to tripartite electric machinery, finishing after be being debugged quickly, proposal user does electric machinery parameter to identify automatically, be like parameter (P0340, p1910) , build data of circuit of electric machinery equivalent, so that be calculated better loss of energy of electric machinery interior. In transducer moving process, transducer is met real time monitoring exports electricity actually, through I2t consideration judges electric machinery to whether pass lukewarm, when I2t computation exceeds P0614 (as a result to MM420) , p0604(to MM440, when temperature of definitive of the place in MM430) , transducer can take the step in set of the place in P0610, if call the police, tripping operation. Following graphs show 1 times: Graph model of protection of temperature of 1 electric machinery notes: Using model of electric machinery temperature to undertake to electric machinery temperature is protected is the function that all products in drive of Xi Menzi standard have. Undertake through temperature sensor the temperature sensor with exterior common protection has two kinds: PTC; KTY84. 1) PTC sensor: PTC(Positive-Temperature-Characteristic) sensor is one is had the resistor of temperature character. Below normal temperature, the block cost of PTC resistor is not high (50-10O is ohmic) . Usually, a sensor of 3 PTC temperature is in electromotor series connection join rises (the design that produces manufacturer according to electromotor) , such, "Cold conditions " the PTC resistance limits below is 150 to 300 ohm. PTC temperature sensor often also is called " cold conductor " . But, in some when specific temperature, the block cost of PTC can rise quickly. The groovy moving temperature that is isolated from according to electromotor will choose this one specific temperature choose electromotor makes manufacturer. Because PTC sensor is installation is in the winding of electromotor, such, can judge electromotor according to the change of resistance whether overheat. PTC temperature sensor cannot use the particular numerical value that measures temperature. To transducer: MM440;MM430;G120 offerred the port of sensor of electric machinery temperature, PTC sensor protection can work at the same time with model of electric machinery temperature. For example MM440, the control that has received MM440 transducer when the PTC of electromotor is carried 14 and 15 when, should choose P0601 ＝ only 1 (use PTC temperature sensor) the function of sensor of activation electromotor temperature, so, MM4 transducer can know the position of electric machinery, the transducer when overheat makes with respect to meeting breakdown tripping operation electromotor gets protective. If PTC resistance exceeds 2000 ohm, transducer will show breakdown F0004 (electromotor is too lukewarm) . If PTC resistance under 100 ohm, transducer will show breakdown F0015 (electromotor temperature detects signal is missing) . Such, when electromotor overheat and temperature sensor break a string, can make electromotor gets protective. In addition, electromotor still gets the monitoring of model of temperature of the electromotor in transducer, pursue as follows, sensor and temperature model are formed " or " relation, formed the redundant system that an electromotor overheat protects. 2) KTY84 sensor: The principle of KTY84 sensor is to be based on semiconductor temperature sensor (diode) , the span of its resistance can arrive from the 500 ohm when 0 ℃ the 2600 ohm when 300 ℃ . KTY84 is had temperature coefficient, but differ with PTC, its temperature character is linear almost. The function of resistor can measure resistance with what have very tall temperature coefficient compatible. If KTY84 sensor is activationed (P0610=2) , transducer can is worth to the block of KTY sensor undertake monitoring, at the same time transducer also is calculated automatically according to electromotor temperature model the temperature of electromotor. KTY84 sensor identifies when giving a clue, give out alarm signal A0512 (electromotor temperature detects signal is missing) , automatic switch arrives the temperature model of electromotor. Pursue as follows 2: Graph 2 temperature model and sensor loop to transducer MM420, G110, did not offer temperature sensor port, we can undertake to electric machinery through model of electric machinery temperature temperature is protected, in the meantime, we also can spark with digital terminal the means of exterior breakdown will protect electric machinery, because to normally temperature sensor, its output impedance to be able to follow temperature thread sexual relationship to change, following graphs are shown 3 times. Because the impedance of this sensor can reflect temperature of current electric machinery, we are OK according to the graph 4 join means, as sensor block the value increases, the 5 voltage that go up can increase terminal gradually. Exceed digital amount when voltage when touching hair voltage, digital terminal is effective, spark exterior breakdown tripping operation. Setting parameter is as follows: P0701, p0702 Or P0703 = 29. Graph 3 resistor and temperature relation graph 4 outside terminal spark breakdown is additional, we also can use temperature relay to spark exterior breakdown, if be in product of Xi Menzi low pressure, have can use the relay that measures electric machinery temperature, be like 3RS1000-1CK10, we are OK a demarcate is worth set, when electric machinery temperature exceeds this value, relay movement, spark exterior tripping operation. Keyword I2t; electric machinery crosses lukewarm protection; PTC; KTY; PT100 CNC Milling