Open loop motion control
12.10 Advanced topics
S7-200 SMART
System Manual, V2.3, 07/2017, A5E03822230-AF
671
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.
Table 12- 49 Special memory area definition for the Axis of Motion 0
SM address
Description
SMB600 to SMB615
Axis name (16 ASCII characters). SMB600 is the first character: "Axis 0"
SMB616 to SMB619
Reserved
SMW620
Axis 0: Error code (See "Axis of Motion error codes" (Page 658) list.)
SMB622
Axis 0: Input/output status: Reflects the status of the inputs and outputs
•
DIS (Disable outputs):
–
0 = No current flow
–
1 = Current flow
•
TRIG (Stop input):
–
0 = No current flow
–
1 = Current flow
•
STP (Stop input):
–
0 = No current flow
–
1 = Current flow
•
LMT- (Negative travel limit input):
–
0 = No current flow
–
1 = Current flow
•
LMT+ (Positive travel limit input):
–
0 = No current flow
–
1 = Current flow
•
RPS (Reference point switch input):
–
0 = No current flow
–
1 = Current flow
•
ZP (Zero pulse input):
–
0 = No current flow
–
1 = Current flow