Memory Usage: Siemens

Memory Usage: Siemens

Revision: 4.10

Download this page along with the Notes and Wiring Diagrams as a Microsoft Word file "Notes.doc" for best printing. This file is included on the disks that come with the MSP and with all driver downloads.

Data Memory Usage. The following block diagrams show the flow of execution and the data resources used by the different drivers. Note that single channel drivers use the memory in the driver logic. The multiplexed drivers use a separate block of storage register for each channel. The data in the storage block is moved into and out of the memory used by the driver logic.

Single Input

Single Output

Multiplexed Input

Multiplexed Output

Logic Memory Usage

S7-212 and S7-214

Driver	Channels		Memory
	Input	Output	Used	Available S7-212	Used % S7-212	Available S7-214	Used % S7-214	For First Point	For Second Point
Msp_I	1		308	512	60%	2048	15%
Msp_I_M	2		427	512	83%	2048	21%	375	52
Msp_IO	1	1	620	512	121%	2048	30%
Msp_IO_M	2	2	856	512	167%	2048	42%
Msp_O		1	329	512	64%	2048	16%
Msp_O_M		2	454	512	89%	2048	22%	396	58

S7-215 and S7-216

Driver	Channels		Memory
	Input	Output	Used	Available S7-215, S7-216	Used % S7-215, S7-216	For First Point	For Second Point
Msp_I	1		308	4096	8%
Msp_I_M	2		427	4096	10%	375	52
Msp_IO	1	1	620	4096	15%
Msp_IO_M	2	2	856	4096	21%
Msp_O		1	329	4096	8%
Msp_O_M		2	454	4096	11%	396	58

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