Siemens 440 manual Load torque monitoring, P2179 Current limit for no load ident, 218

Parameter Description Issue 01/06

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

Level

3

Threshold current for A0922 (load missing) in [%] relative to P0305 (rated motor current) as illustrated in the diagram below.

Load missing

I_act

1

0

Cur.lim:no-load ID 0.0 ... 10.0 [%]

Pulse_enableP2179 (3.0)

&

T 0

Load missing

r2197 Bit11

V_act	1
	0
	0

Load missing delay 0 ... 10000 [ms] P2180 (2000)

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).

Level

3

3.36Load 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

Level

2

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:

0Belt failure detection disabled

1Warning: Low torque / frequency

2Warning: High torque / frequency

3Warning: High / low torque / frequency

4Trip: Low torque / frequency

5Trip: High torque / frequency

6Trip: 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)

218	MICROMASTER 440 Parameter List
	6SE6400-5BB00-0BP0