Schneider Electric PM870 manual Memory Allocation for Log Files, Alarm Log, Maintenance Log, Model

PowerLogicTM Series 800 Power Meter	63230-500-225A2
Chapter 7—Logging	3/2011

Memory Allocation for Log Files

Each file in the power meter has a maximum memory size. Memory is not shared between the different logs, so reducing the number of values recorded in one log will not allow more values to be stored in a different log. The following table lists the memory allocated to each log:

Table 7–3: Memory Allocation for Each Log

Log Type	Max. Records	Max. Register	Storage	Power Meter
	Stored	Values Recorded	(Bytes)	Model
Alarm Log	100	11	2,200	All models
Maintenance Log	40	4	320	All models
				PM810 with
Billing Log	5000	96 + 3 D/T	65,536	PM810LOGPM820
				PM850
				PM870
				PM810 with
Data Log 1	1851	96 + 3 D/T	14,808	PM810LOGPM820
				PM850
				PM870
Data Log 2	5000	96 + 3 D/T	393,216	PM850
				PM870
Data Log 3	5000	96 + 3 D/T	393,216	PM850
				PM870
Data Log 4	32,000	96 + 3 D/T	393,216	PM850
				PM870

Alarm Log

By default, the power meter can log the occurrence of any alarm condition. Each time an alarm occurs it is entered into the alarm log. The alarm log in the power meter stores the pickup and dropout points of alarms along with the date and time associated with these alarms. You select whether the alarm log saves data as first-in-first-out (FIFO) or fill and hold. With PowerLogic software, you can view and save the alarm log to disk, and reset the alarm log to clear the data out of the power meter’s memory.

Alarm Log Storage

The power meter stores alarm log data in non-volatile memory. The size of the alarm log is fixed at 100 records.

Maintenance Log

The power meter stores a maintenance log in non-volatile memory. The file has a fixed record length of four registers and a total of 40 records. The first register is a cumulative counter over the life of the power meter. The last three registers contain the date/time of when the log was updated. Table 7–4describes the values stored in the maintenance log. These values are cumulative over the life of the power meter and cannot be reset.

NOTE: Use PowerLogic software to view the maintenance log.

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