Special Memory (Sm) Locations For The Axis Of Motion - Siemens SIMATIC S7 System Manual

Open loop motion control
12.10 Advanced topics
12.10.2

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:
670
Axis of Motion 0
SMB600 to SMB649
Axis of Motion 1
SMB650 to SMB699
System Manual, V2.3, 07/2017, A5E03822230-AF
Axis of Motion 2
SMB700 to SMB749
S7-200 SMART