Siemens 6RA70 specifications Fault Description

Fault

No.

Description
Cause as a function of fault value	Further information (r047.002 to r047.016)
(r047.001, r949.001 or r949.009 with acknowledged error)

F043 EMF too high for braking operation (active in operating states of – –, I, II)

This fault message is activated if the following 5 conditions are fulfilled when a torque direction reversal is requested (selection of MI or MII):

♦P272=0 (fault message is parameterized and not alarm + field weakening)

♦A parameterized, additional, torque-free interval (P160 ≠ 0) has expired

♦Parallel drive is ready for engagement of the new torque direction

♦The absolute value of the armature current (K0118) requested in the new torque direction is >0.5% of P072

♦The calculated firing angle (K0101) for the armature current requested for the new torque direction is >165 degrees.

Possible fault causes

♦No “speed-dependent field weakening" (P081=0) is parameterized even though operation in the field weakening range is needed for the requested maximum speed

Note:

In motor operation, it is possible to reach EMF values corresponding to the peak of the phase-to-phase supply voltage at a firing angle of αG=30° (rectifier stability limit P150) and low armature currents.

♦Setpoint EMF for field weakening operation too high (parameter P101 is set too high)

♦Supply voltage dip

♦EMF controller or field current controller is not optimized, possibly resulting in excessive EMF on power-up.

Fault value:	r047 Index 002 to 016:
Calculated firing angle (armature) before limitation (K0101)	i002	Instantaneously measured actual EMF (K0287)
	i003	Armature current controller setpoint (K0118)

F044 A slave connected to the paralleling interface is not operating

(active when U800 = 1 or 2 and U806>10 (master) after receipt of the first valid protocol in operating states – –, I, II)

Fault value:

1A fault message is active on a slave

2A slave is not in operation (e.g. because its enable input is set to "0")

F046 Analog select input for main setpoint (terminals 4 and 5) faulty (active in operating states of ≤ o6)

This fault message is activated when P700=2 (current input 4 to 20 mA) and an input current of less than 2mA is flowing.

Possible fault causes

♦Open circuit in supply cable

♦P700 is incorrectly set

F047 Analog select input 1 (terminals 6 and 7) is faulty (active in operating states of ≤ o6)

This fault message is activated when P710=2 (current input 4 to 20 mA) and an input current of less than 2mA is flowing.

Possible fault causes

♦Open circuit in supply cable

♦P710 is incorrectly set

Siemens Energy & Automation	9-13
SIMOREG DC Master Base Drive Panel	Operating Instructions