Commissioning - Siemens SIMATIC S7 System Manual
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Also See for SIMATIC S7:
- System manual (866 pages) ,
- Functional safety manual (212 pages) ,
- User manual (134 pages)
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9.3.4
Commissioning
"Status and error bits" diagnostic function
Use the "Status and error bits" diagnostic function to monitor the most important status and
error messages for the axis. The diagnostic function display is available in online mode in
"Manual control" mode and in "Automatic control" when the axis is active.
Table 9- 51
Status of the axis
Status
Description
Enabled
The axis is enabled and ready to be controlled via motion control tasks.
(Tag of technology object: <Axis name>.StatusBits.Enable)
Homed
The axis is homed and is capable of executing absolute positioning tasks of motion control
instruction "MC_MoveAbsolute". The axis does not have to be homed for relative homing. Special
situations:
(Tag of technology object: <Axis name>.StatusBits.HomingDone)
Error
An error has occurred in the "Axis" technology object. More information about the error is available
in automatic control at the ErrorID and ErrorInfo parameters of the motion control instructions. In
manual mode, the "Last error" field of the control panel displays detailed information about the
cause of error.
(Tag of technology object: <Axis name>.StatusBits.Error)
Control panel active
The "Manual control" mode was enabled in the control panel. The control panel has control priority
over the "Axis" technology object. The axis cannot be controlled from the user program.
(Tag of technology object: <Axis name>.StatusBits.ControlPanelActive)
Table 9- 52
Drive status
Status
Description
Drive ready
The drive is ready for operation.
(Tag of technology object: <Axis name>.StatusBits.DriveReady)
Error
The drive has reported an error after failure of its ready signal.
(Tag of technology object: <Axis name>.ErrorBits.DriveFault)
Table 9- 53
Status of the axis motion
Status
Standstill
Accelerating
S7-1200 Programmable controller
System Manual, 11/2011, A5E02486680-05
During active homing, the status is FALSE.
If a homed axis undergoes passive homing, the status is set to TRUE during passive homing.
Description
The axis is at a standstill.
(Tag of technology object: <Axis name>.StatusBits.StandStill)
The axis accelerates.
(Tag of technology object: <Axis name>.StatusBits.Acceleration)
102BTechnology instructions
9.3 Basic motion control
377
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