Siemens Simatic S7 Series System Manual

Special memory (SM) and system symbol names
D.23 SMB600-SMB749: Axis (0, 1, and 2) open loop motion control
S7-200 SMART
686 System Manual, 09/2015, A5E03822230-AC
D.23
SMB600-SMB749: Axis (0, 1, and 2) open loop motion control
Axis configuration and control SM addresses
This axis special memory data is normally read and written by wizard generated program
code.
Axis data SM address
Axis function
Axis 0
Axis 1
Axis 2
SMB600-
SMB615
SMB650-
SMB665
SMB600-
SMB615
Axis name (16 ASCII characters). The first character is the lowest numbered byte in
the sequence.
SMB616-
SMB619
SMB616-
SMB619
SMB616-
SMB619
Reserved
SMW620
SMW670
SMW720
Error code - See Axis of Motion error codes (Page 544)
Axis data SM address
Axis function
Axis 0
Axis 1
Axis 2
SMB624
SMB674
SMB724
CUR_PF is a byte that indicates the profile currently being executed.
SMB625 SMB675 SMB725
CUR_STP
is a byte that indicates the step currently being executed in the profile.
SMD626
SMD676
SMD726
CUR_POS is a double-word value that indicates the current position of the axis.
SMD630 SMD680 SMD730
CUR_SPD
is a double-word value that indicates the current speed of the axis.

Siemens Simatic S7 Series Specifications

General

CPU	Varies by model (e.g., S7-300, S7-400, S7-1200, S7-1500)
Communication Interfaces	PROFIBUS, PROFINET, Ethernet, MPI
Programming	TIA Portal, STEP 7
Programming Languages	LAD, FBD, STL, SCL, GRAPH
I/O Modules	Digital, Analog, Specialty modules available
Operating Temperature	0°C to 60°C (standard models)
Mounting	DIN rail mounting
Operating Voltage	24V DC or 120/230V AC (varies by model)
Protection Class	IP20 (standard models)
Memory	Varies depending on the S7 model. Includes work memory (RAM) for program execution, load memory (EEPROM or Flash) for program storage, and system memory for operating system functions. Memory sizes range from kilobytes to megabytes.