Siemens SIMATIC S7-1200 Manual page 199

Parameter and type
Mode
Done
Busy
CommandAborted
Error
ErrorID
ErrorInfo
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
 After power-cycling the CPU
 After CPU restart (RUN-to-STOP or STOP-to-RUN)
To home the axis, follow these steps:
1. Check the requirements indicated above.
2. Initialize the necessary input parameters with values, and start the homing operation with
3. If output parameter "Done" and technology object tag <Axis
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Manual, 11/2011, A5E02486774-04
Data type
IN Int
OUT Bool
OUT Bool
OUT Bool
OUT Bool
OUT Word
OUT Word
homing is available again.)
a rising edge at input parameter "Execute".
name>.StatusBits.HomingDone indicate the value TRUE, homing is complete.
Description
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.
TRUE = Task completed
TRUE = The task is being executed.
TRUE = During execution the task was aborted by another
task.
TRUE = An error has occurred during execution of the task.
The cause of the error can be found in parameters "ErrorID"
and "ErrorInfo".
Error ID for parameter "Error""
Error info ID for parameter "ErrorID"
Motion control is easy
10.4 MC_Home instruction
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