Mitsubishi Electric MELSEC-Q-MR-JE-C Reference Manual page 37

Function overview
Item Description
Applicable hardware and Applicable CPU
software
Applicable engineering tool
Language Structured Text
Number of basic steps 1174 steps
Function description This FB moves the specified axis for the specified distance from the set value.
This FB is executed when Execute turns ON, and Busy turns ON when the processing is normally started.
When the processing is completed and positioning of the axis is completed, Done turns ON.
The axis status during positioning control is DiscreteMotion.
When an error has occurred in the FB, this FB turns ON Error and stores an error code in ErrorID.
For details of error codes, refer to  Page 61 Troubleshooting.
Restrictions and precautions
FB operation type Pulsed execution (multiple scan execution type)
Timing chart [Normal completion]
[Error completion]
• Before executing this FB, set the torque limit value (PositiveTorqueLimit, NegativeTorqueLimit) of the AXIS_REF
structure.
• When executing this FB while the continuous control FB is in execution (AxisStatus is ContinuousMotion), execute this FB
with the axis stopped.
• When turning OFF an execution command (Execute) after turning it ON, be sure to turn it OFF after Executing (Busy) is
ON.
• This FB cannot be executed while a positioning warning (alarm number: F4) is occurring in the servo amplifier.
• This FB cannot be used to control the axis of which the unit is set as degree.
• This FB cannot be executed while the positioning control FB is in execution (AxisStatus is DiscreteMotion).
• When another positioning control FB is executed with an execution completion (Done) of this FB, do not turn ON the
execution command (Execute) of the another FB to be executed, and turn OFF the execution command (Execute) of the
executed FB in the same scan. Otherwise, an error occurs in the another FB to be executed.
Execute
Busy
Done
CommandAborted
Error
ErrorID
Execute
Busy
Done
CommandAborted
Error
ErrorID
QnUDVCPU
GX Works2
0
Error code
3.2 Details of the FB Library
3
3 FB LIBRARY
35