Siemens 810T manual 11.91

11.91	4 Monitoring Functions
4.6	Listing of the alarms/alarm description

Alarm No.	14
Alarm Text:	ºRAM error memory moduleº
Remarks:	Alarm only on commissioning
Alarm No.	16
Alarm Text:	ºParity error RS232C (V.24)º
Reason:	The last character transferred has incorrect parity.
Effect:	RS232 transfer is interrupted; the last block is not stored
Remedy:	± Check setting data 5011/5013/5019/5021
	±	Test external device
Explanation:	The alarm only appears when the setting data ºwith parity bitº is set.
Alarm No.	17
Alarm Text:	ºOverflow error RS232C (V.24)º
Reason:	Transfer speed is not correct
Effect:	± Data transfer is interrupted
	±	The last block is not stored
Remedy:	± Check setting data 5011/5013/5019/5021
	±	Check transfer speed (Baud rate)
Alarm No.	18
Alarm Text:	ºFrame error RS232C (V.24)º
Reason:	± Number of stop bits is incorrect
	±	Baud rate is incorrect
	±	Number of data bits is incorrect
Effect:	± Data transfer is interrupted
Remedy:	± The last block is not stored
	±	Check setting data 5011/5013/5019/5021
	±	Test external device
Alarm No.	19
Alarm Text:	ºI/O device not ready RS232C (V.24)º
Reason:	DSR signal has low level.
Effect:	No data are read in.
Remedy	±	Start external device
	±	Do not use DSR (isolate cable)
Alarm No.	20
Alarm Text:	ºPLC alarm memory not formattedº
Remarks:	Alarm only on commissioning

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SINUMERIK 810T, GA3 (BN)