Installation
4-28
L
MA9300PLC EN 1.4
4.2.9 Motor temperature monitoring
Selection of the sensor
type
• Thermal sensor KTY
– ”Linear” thermal sensor in the motor winding (standard for Lenze motors MDXKX and MDXQX)
• PTC thermistor
– PTC thermistor with defined tripping temperature (acc. to DIN 44081 and DIN 44082)
• Thermostat TKO
– Thermostat/normally-closed contact
Other monitoring KTY, PTC and TKO do not offer complete protection. To improve the monitoring, Lenze recommends the use of a bimetallic relay.
Alternative monitoring Comparators (L_CMP1 ... L_CMP3) monitor and a time element (L_TRANS1 ... L_TRANS4) limits the motor current for small speeds
or motor standstill.
This function can be implemented by the corresponding interconnection of function blocks.
Reactions Different, depending on the temperature monitoring.
Stop!
Do not connect an external voltage to inputs.
Lenze motors Motors of other manufacturers
MDXKX and MDXQX with thermostat with sensor for continuous tempera-
ture detection
with thermal contact or
PTC acc. to DIN
44081/44082
Connection • Resolver input X7:
–PinX7/8= PTC+,
Pin X7/9 = PTC-
• Encoder input X8:
–PinX8/8= PTC+,
Pin X8/5 = PTC-
Terminals T1/T2 next to
terminalsU,V,W
• Resolver input X7:
–PinX7/8= PTC+,
Pin X7/9 = PTC-
• Encoder input X8:
–PinX8/8= PTC+,
Pin X8/5 = PTC-
Terminals T1/T2 next to
terminalsU,V,W
Fault message TMot> Setpoint
(OH3)
TMot>C0121
(OH7)
PTCOverTemp
(OH8)
TMot>Setpoint
(OH3)
TMot>C0121
(OH7)
PTCOverTemp
(OH8)
Possible reactions
The corresponding monitoring and thus the following codes are preset under C0086
• Trip
(C0583 = 0)
• OFF
(C0583 = 3)
• Wa r n i n g
(C0584 = 2)
• OFF
(C0584 = 3)
• Trip (C0585 = 0)
• Wa r n i n g
(C0585 = 2)
• OFF (C0585 = 3)
• Trip
(C0583 = 0)
• OFF
(C0583 = 3)
• Wa r n i n g
(C0584 = 2)
• OFF
(C0584 = 3)
• Trip (C0585 = 0)
• Wa r n i n g
(C0585 = 2)
• OFF (C0585 = 3)
Tripping
temperature
fixed at 150 °C adjustable
45 °C ... 150 °C
(C0121)
fixed, (depending on the
PTC/thermal contact):
PTC: at R
ϑ
> 1600 Ω
fixed at 150 °C adjustable
45 °C ... 150 °C
(C0121)
fixed, (depending on the
PTC/thermal contact):
PTC: at R
ϑ
> 1600 Ω
Notes • Monitoring is active in the default
setting.
• If resolver (X7) and encoder (X8) are
operated together:
– Connect PTC only to one connector
(X7 or X8)
– The PTC connection of the other
connector remains unconnected
• For further information on the
connection of the thermal sensor,
please consult the description of the
feedback system
• Deactivate monitoring
via X7 or X8 under
C0583=3 and C0584=3
• The connection is done
according to DIN 44081
(see also Fig. 4-14)
• We recommend a Ziehl PTC (up to
150 °C) K15301075 or a thermostat.
• Enter characteristic ^ 4-29
• Deactivate monitoring via X7 or X8
under C0583=3 and C0584=3
• Deactivate monitoring
via X7 or X8 under
C0583=3 and C0584=3
• The connection is done
according to DIN 44081
(see also Fig. 4-14)
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