Siemens 440 - Manual (Page 218)

Parameter Description Issue 01/06
MICROMASTER 440 Parameter List
218 6SE6400-5BB00-0BP0
P2179 Current limit for no load ident. Min: 0.0
CStat: CUT Datatype: Float Unit: % Def: 3.0
P-Group: ALARMS Active: Immediately QuickComm.: No Max: 10.0
Threshold current for A0922 (load missing) in [%] relative to P0305 (rated motor current) as illustrated in the
diagram below.
0
1
r2197 Bit11
0
1
0
&
Cur.lim:no-load ID
0.0 ... 10.0 [%]
P2179 (3.0)
Load missing delay
0 ... 10000 [ms]
P2180 (2000)
| V_act |
Pulse_enable
| I_act |
Load missing
Load missing
T 0
Note:
- It may be that the motor is not connected (load missing) or a phase could be missing.
- If a motor setpoint cannot be entered and the current limit (P2179) is not exceeded, Alarm A0922 (no
load applied) is issued when delay time (P2180) expires.
P2180 Delay time for load missing Min: 0
CStat: CUT Datatype: U16 Unit: ms Def: 2000
P-Group: ALARMS Active: Immediately QuickComm.: No Max: 10000
Delay time to identify that the current is less than the threshold defined in P2179.
Details:
See diagram in P2179 (current limit for no load identification).
3.36 Load torque monitoring
P2181[3] Belt failure detection mode Min: 0
CStat: CT Datatype: U16 Unit: - Def: 0
P-Group: ALARMS Active: first confirm QuickComm.: No Max: 6
Parameter P2181 activates or de-activates the load torque monitoring and defines the response to a load
torque fault.
Using the load torque monitoring, it is possible to detect a mechanical failure or an overload condition of the
mechanical transmission line, e.g. a broken drive belt or a stalled conveyor belt. In this case, the actual
torque/frequency actual value is compared to a programmed envelope characteristic (refer to P2182 -
P2190). If the actual torque/frequency actual value lies above or below the envelope curve, then after the
delay time P2192 expires, as a function of P2181, alarm A0952 is output or the drive inverter is tripped with
fault message F0452.
Possible Settings:
0 Belt failure detection disabled
1 Warning: Low torque / frequency
2 Warning: High torque / frequency
3 Warning: High / low torque / frequency
4 Trip: Low torque / frequency
5 Trip: High torque / frequency
6 Trip: High / low torque / frequency
Index:
P2181[0] : 1st. Command data set (CDS)
P2181[1] : 2nd. Command data set (CDS)
P2181[2] : 3rd. Command data set (CDS)
Level
3
Level
3
Level
2