Siemens SINUMERIK 840D sl Function Manual page 52

A2: Various NC/PLC interface signals and functions
2.2 NC/PLC interface signals - only 840D sl
DB31, ... DBX94.1 (heat sink temperature prewarning)
The temperature of the heat sink in the power unit is outside the permissible range. If the
overtemperature remains, the drive switches itself off after approx. 20 s.
Note
Temperature prewarning DB31, ... DBX94.0 and DBX94.1
The interface signals are derived from the following signals of the cyclic drive telegram:
● Case 1: Temperature warning in the message word
– DB31, ... DBX94.0 = MELDW, bit 6 (no motor overtemperature warning)
– DB31, ... DBX94.1 = MELDW, bit 7 (no thermal overload in power unit warning)
● Case 2: Warning of warning class B (only in interface mode "SIMODRIVE 611U", p2038 = 1)
DB31, ... DBX94.0 == 1 and DBX94.1 == 1, if the following applies:
Cyclic drive telegram, status word 1 (ZSW1), bits 11/12 == 2 (warning class B)
The interface signals are derived from the warning of warning class B if there is no specific
information from the message word.
An alarm is displayed. Alarm number = 200.000 + alarm value (r2124)
For a detailed description of the motor temperature monitoring setting, see:
References:
● S120 Commissioning Manual, Section "Commissioning" > "Temperature sensors for
SINAMICS components"
● S120 Function Manual, Section "Monitoring and protective functions"
● S120 List Manual
– MELDW, bit 6 ≙ BO: r2135.14 → function diagram: 2548, 8016
– MELDW, bit 7 ≙ BO: r2135.15 → function diagram: 2548, 2452, 2456, 8016
DB31, ... DBX94.2 (run-up completed)
The actual speed value is within the parameterized tolerance band again after changing the
speed setpoint. The run-up procedure is now completed.
Any subsequent speed fluctuations, also outside the tolerance band, e.g. due to load changes,
will not affect the interface signal.
DB31, ... DBX94.3 (|M
The absolute value of the current torque |M
M
dx
The threshold torque is set as a percentage [%] of the current speed-dependent torque
limitation.
DB31, ... DBX94.4 (|n
The actual speed value n
52
| < M )
d dx
(torque threshold value 2, p2194).
| < n )
act min
act
| is less than the parameterized threshold torque
d
is less than n (speed threshold value 3, p2161).
min
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions