Siemens 6RA70 specifications Communication errors with supplementary boards

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)

Fault value:		r047 Index 002 to 016:
1	Heatsink temperature > permissible heatsink temperature	i002	Measured heatsink temperature (16384 .. 100°C)
2	Heatsink temperature sensor is defective	i003	Measured ADC value
3	Converter fan is defective

F068 Analog measuring channel faulty (main setpoint, main actual value or analog select input) (active in all operating states)

Hardware monitoring of measuring circuits

Possible fault causes

•A7001 module defective

•Measuring circuit saturated (input voltage at terminals 4 and 5 or 6 and 7 higher than approx. 11.3V)

Fault value:

1Measuring channel for main setpoint / analog select input 1 faulty (terminals 4 and 5)

2Measuring channel for main actual value faulty (terminals 103 and 104)

3Measuring channel for analog select input 1 faulty (terminals 6 and 7)

F069 MLFB data are faulty (active in all operating states)

Possible fault causes

♦Excessive EMC-related interference is present

(e.g. due to unprotected contactors, unscreened cables, loose shield connections)

♦A7009 backplane wiring assembly is defective

Fault value:		r047 Index 002 to 016:
1	MLFB code number (r070) = MLFB code number (r070)	i002 Incorrect MLFB code number
	is illegal
2	MLFB data checksum error	-
3	Works number checksum error	-
4	Number of words of MLFB data is incorrect	-

9.1.2.13Communication errors with supplementary boards

F070 SCB1: Serious initialization error (active in all operating states)

SCB1 and SCI cannot power up correctly (see diagnostic parameter n697 for details)

Fault value:

12No connection to slave 1

22No connection to slave 2

F073 SCB1: Current below 4mA minimum value at analog input1 of slave 1 (active in all operating states)

The cause of the fault may be a cable break

F074 SCB1: Current below 4mA minimum value at analog input2 of slave 1 (active in all operating states)

The cause of the fault may be a cable break

F075 SCB1: Current below 4mA minimum value at analog input3 of slave 1 (active in all operating states)

The cause of the fault may be a cable break

F076 SCB1: Current below 4mA minimum value at analog input1 of slave 2 (active in all operating states)

The cause of the fault may be a cable break

F077 SCB1: Current below 4mA minimum value at analog input2 of slave 2 (active in all operating states)

The cause of the fault may be a cable break

Siemens Energy & Automation	9-25
SIMOREG DC Master Base Drive Panel	Operating Instructions