Siemens SINAMICS S120 Installation And Start-Up Manual page 108

Communication via PROFIBUS
Cyclic communication
Table 4-10 Description of MSGW (message word), continued
Bit Meaning
No motor overtemperature No motor overtemperature
alarm
Note:
S
When the motor temperature threshold is exceeded, only an alarm is output initially to warn
6
you of this. The alarm is canceled automatically when the temperature no longer exceeds the
alarm threshold.
S
If the overtemperature is present for longer than the value set via p0606, a fault is output to
warn you of this.
S
The motor temperature monitor can be switched on/off via p0600 = 0.
Application:
The user can respond to this message by reducing the load, thereby preventing the motor from
shutting down with the "Motor temperature exceeded" fault after the set time has elapsed.
No thermal overload in
7
power section alarm
Speed setp - act val
8
deviation in tolerance t_off deviation in tolerance t_off
9
...
Reserved Reserved
12
Pulses enabled Pulses enabled
13
Application:
Armature short-circuit protection must only be switched on when the pulses are inhibited.
This signal can be evaluated as one of many conditions when armature short-circuit protection is
activated.
4-108
Comments
1 No motor overtemperature alarm
The temperature of the motor is within the per-
missible range.
0 Motor overtemperature alarm
The temperature of the motor is greater than the
set motor temperature threshold (p0604).
1 No thermal overload in power section alarm
The temperature of the heat sink in the power
section is within the permissible range.
0 Thermal overload in power section alarm
The temperature of the heat sink in the power
section is outside the permissible range.
If the overtemperature remains, the drive
switches itself off after approx. 20 s.
1 The speed setpoint-actual value deviation is
within the tolerance range (p2163): The signal is
switched off after the time specified in p2166 has
elapsed.
0 The speed setpoint-actual value deviation is
outside the tolerance range.
1 –
0 –
1 Pulses enabled
The pulses for activating the motor are enabled.
0 Pulses inhibited
SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition
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r2135.14
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r2135.15
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r2197.7 r2197.7
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E Siemens AG, 2004. All rights reserved
BICO