Mitsubishi FR-A800

(H) Protective function parameter
338
PARAMETERS
Overheat protection to match the characteristic of the motor (Pr.600 to
Pr.604, Pr.692 to Pr.696)
• The activation level of the electronic thermal O/L relay can be varied to match the motor temperature characteristic.
• The electronic thermal O/L relay's activation level can be set using the combination of three points (Pr.600, Pr.601),
(Pr.602, Pr.603), (Pr.604, Pr.9). Two or more points are required for setting.
• The electronic thermal O/L relay's activation level can be set to using the combination of three points (Pr.692, Pr.693),
(Pr.694, Pr.695), (Pr.696, Pr.51) when the RT signal is ON.
• When setting Pr.600, Pr.602, Pr.604 (Pr.692, Pr.694, Pr.696) to the same frequency, the following graph's upper level will
be applied.
NOTE
• Make sure to set the parameters according to the motor temperature characteristic used.
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Parameters referred to
Pr.71 Applied motor page 438
Pr.72 PWM frequency selection page 277
Pr.178 to Pr.189 (input terminal function selection) page 430
Pr.190 to Pr.196 (output terminal function selection) page 384
Output frequencyPr.600
(Pr.692)
Pr.602
(Pr.694)
100%
Pr.603
(Pr.695)
Pr.601
(Pr.693)
Pr.604
(Pr.696)
Load ratio (ratio to Pr.9 (Pr.51)) [%]
Continuous operation characteristic
100%
70%
50%
60Hz30Hz6Hz
Frequency Frequency
Pr.9=100% of the rated
motor current
Pr.600=6Hz
Pr.601=50%
Pr.602=30Hz
Pr.603=70%
Pr.604=60Hz
50%
100%
60Hz3Hz 120Hz
60%
Pr.600=120Hz
Pr.601=60%
Pr.602=3Hz
Pr.603=50%
Pr.604=60Hz
Load ratioLoad ratio
Setting
example 1
Setting
example 2
Outout frequency[Hz]
Pr.600 = 10Hz
Pr.602 = 10Hz
100
80
Pr.603 = 50%
50
Pr.601 = 80%
10
Pr.604 = 10Hz
Load ratio [%]