Siemens S7-1200 - Page 461

Technology instructions
9.3 Motion control
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
461
Table 9- 33 Parameters for the MC_Home instruction
Parameter and type
Data type
Description
Axis
IN
TO_Axis_PTO
Axis technology object
Execute
IN
Bool
Start of the task with a positive edge
Position IN Real
• Mode = 0, 2, and 3 (Absolute position of axis after
completion of the homing operation)
• Mode = 1 (Correction value for the current axis position)
Limit values: -1.0e
12
≤ Position ≤ 1.0e
12
Mode IN Int Homing mode
• 0: Direct homing absolute
New axis position is the position value of parameter
"Position".
• 1: Direct homing relative
New axis position is the current axis position + position
value of parameter "Position".
• 2: Passive homing
Homing according to the axis configuration. Following
homing, the value of parameter "Position" is set as the
new axis position.
• 3: Active homing
Reference point approach in accordance with the axis
configuration. Following homing, the value of parameter
"Position" is set as the new axis position.
Done
OUT
Bool
TRUE = Task completed
Busy
OUT
Bool
TRUE = The task is being executed.
CommandAborted OUT Bool TRUE = During execution the task was aborted by another
task.
Error OUT Bool TRUE = An error has occurred during execution of the task.
The cause of the error can be found in parameters "ErrorID"
and "ErrorInfo".
ErrorID
OUT
Word
Error ID for parameter "Error""
ErrorInfo
OUT
Word
Error info ID for parameter "ErrorID"
Note
Axis homing is lost under the following conditions
•
Disabling of axis by the MC_Power instruction
•
Switchover between automatic control and manual control
•
Upon start of active homing (After successful completion of the homing operation, axis
homing is available again.)
•
After power-cycling the CPU
•
After CPU restart (RUN-to-STOP or STOP-to-RUN)