Siemens SM2 monitoring system, U3585-J-Z125-8-76 1 manual Outputting and saving monitored data

Outputting and saving monitored data SM2 monitoring program

		Monitoring cycle
			Sampling cycle
val1	val2		val3	val4	..... valn
value	1	∑	n
	= --		valj
	n		1

To obtain data, SM2 counts and system counts are evaluated. Mean values are computed, percentage frequencies are determined, and total values are calculated in order to arrive at monitored data.

Figure 3: Relationship between the sampling cycle and the monitoring cycle

2.8 Outputting and saving monitored data

At the end of a monitoring cycle, the monitored data is summarized into groups which have similar content, extended by the SM2 monitoring task to include additional information (time stamp, host, ...), and then written to a central SM2 data buffer.

If a user has activated online monitoring, the monitored data is transferred from the central data buffer to the buffer of the user task. Note that sensitive data is transferred to privileged users only. The monitored data is then processed and output in the address space of the user task.

For background monitoring, the SM2 administrator can open an SM2 output file. At the end of a monitoring cycle, the monitored data is grouped into data records and written to the SM2 output file. The information in the SM2 output file can be used for subsequent problem and trend analyses. Special analysis routines are provided for this purpose.

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