Siemens 6RA70 F078, F079 SCB1 Telegram failure, F080 Error in initialization of a CB/TB board

Fault		Description
No.		Cause as a function of fault value		Further information (r047.002 to r047.016)
		(r047.001, r949.001 or r949.009 with acknowledged error)
F078	SCB1: Current below 4mA minimum value at analog input3 of slave 2
	(active in all operating states)
	The cause of the fault may be a cable break
F079	SCB1: Telegram failure
	(active in all operating states)
	Check function of SCB1 (activity LEDs) and connection to SCI slaves (fiber optics)
F080	Error in initialization of a CB/TB board
	Possible causes for fault values 1 and 6:
	♦ CB/TB board is defective
	♦ CB/TB board is not installed correctly
	♦ CB/TB board is taking too long to run up (e.g. due to very complex TB configuration)
	Fault value (r949 index 001):		r047 index 002 to 016:
	1	The "Heartbeat counter“ of the CB/TB has not started to	i015 Code number of board:
		count within 20 s	1	TB or 1st CB
			2	2nd CB
	2	The product version of the installed CT/TB board is not	i002 Code number of slot containing incompatible board:
		compatible with the SIMOREG 6RA70 converter	2	Slot D
			3	Slot E
			4	Slot F
			5	Slot G
			6	CB when configuration includes TB
	5	Parameters P918, U711 to U721 are not correctly set or	i015 Code number of board:
		not accepted after a change by means of U710 = 0	1	TB or 1st CB
		setting. (The meanings of these parameters are defined	2	2nd CB
		in the manual for the relevant CB board, see also function
		diagrams, Section 8, Sheets Z110 and Z111)
	6	The initialization run for a CB/TB board has not been	i015 Code number of board:
		completed within 40 s	1	TB or 1st CB
			2	2nd CB
F081	CB/TB heartbeat error		i015 Code number of board:
	CB/TB has not incremented the monitoring counter for a period		1	TB or 1st CB
			2	2nd CB
	of 800 ms
	Possible causes of fault
	♦ CB/TB board is defective
	• CB/TB board is not correctly installed
F082	CB/TB message timeout or error in data exchange
	Possible causes of fault
	♦ CB/TB PZD message timeout (with fault value 10)
	♦ Excessive EMC-related interference
		(e.g. due to unprotected contactors, unscreened cables, loose screen connections)
	♦ CB/TB board is defective
	♦ CB/TB board is not correctly inserted
	Fault value (r949 index 001):		r047 Index 002 to 016:
	1	Fault in alarm channel from CB to basic unit	i015 Code number of board:
			1	TB or 1st CB
			2	2nd CB
	2	Fault in alarm channel from TB to basic unit
	3	Fault in fault channel from TB to basic unit
	5	Fault in parameter job channel from CB to basic unit	i015 Code number of board:
			1	TB or 1st CB
			2	2nd CB
	6	Fault in parameter response channel from basic unit to	i015 Code number of board:
	CB		1	1st TB or 1st CB
			2	2nd CB
	7	Fault in parameter job channel from TB to basic unit
9-26				Siemens Energy & Automation
			SIMOREG DC Master Base Drive Panel Operating Instructions