Homing Request - Mitsubishi Electric MELSEC iQ-R Series User Manual

■Output variables
Name
Execution completion
Executing
Controlling
Abortion of execution
Error
Error code

Homing Request

AxisName.Md.Homing_Request must be TRUE in the motion system, and homing must be executed in the following cases.
The reason of the homing request is TRUE is recorded in event history.
• System's power supply on or reset (When using an absolute position system and when homing has been completed at the
system/driver power off or reset, the homing request is not turned TRUE.)
• Homing start (Unless homing is completed normally, the homing request flag does not turn FALSE.)
• If the absolute position data in the motion system is erased by a memory error, etc., the warning "Absolute Position Data
Incorrect Warning" (warning code: 0D00H) will occur.
• Axis type change
[Only for real drive axis]
• Driver's power supply on (When using an absolute position system and when homing has been completed at the system/
driver power off or reset, the homing request is not turned ON.)
• "Absolute position erased" detection in driver side
• "Polarity (607EH)" b7: position polarity of driver objects change
• Driver and motor encoder change detection
• A driver other than the connected driver at the previous establishment of the home position is connected when using
emulate function
AxisName.Md.Homing_Request turns FALSE by the completion of the homing.
When homing is not required
Execute a homing request clear in systems that do not require homing. AxisName.Md.Homing_Request can be turned FALSE
by doing so. For details, refer to the following.
Page 170 Operation Setting for Incompletion of Homing
5 HOMING
166
5.1 Outline
Variable name Data type
Done BOOL
Busy BOOL
Active BOOL
CommandAborted BOOL
Error BOOL
ErrorID WORD(UINT)
Default Description
value
FALSE Indicates that the homing is completed.
FALSE Indicates that the FB is in execution.
FALSE Indicates that the FB is controlling the axis.
FALSE Indicates that another FB has aborted the
execution of the FB.
FALSE When TRUE, it indicates that an error has
occurred in the FB.
0 The error code generated in the FB is returned.
For details, refer to the following.
Page 534 List of Error Codes