Open loop motion control
12.10 Advanced topics
S7-200 SMART
556 System Manual, 09/2015, A5E03822230-AC
Special memory (SM) locations for the Axis of Motion
The CPU allocates 50 bytes of special memory (SM) to each Axis of Motion. (See the
following table.) When the Axis of Motion detects an error condition or a change in status of
the data, the Axis of Motion updates these SM locations. The first Axis of Motion updates
SMB600 through SMB649 as required to report the error condition, the second Axis of
Motion updates SMB650 through SMB699, and so on.
Table 12- 48 Special memory bytes SMB600 to SMB749
SM bytes for Axes of Motion:
SMB600 to SMB649 SMB650 to SMB699 SMB700 to SMB749
The following table shows the structure of the SM data area allocated for an Axis of Motion.
The definition uses Axis 0 as an example.
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