Siemens sinumerik 840D sl Function Manual page 547

Detailed description
2.7 Function -specific display data
2.7 Function-specific display data
The "clearance control" technological function provides specific display data for supporting
start-up and for service purposes.
Possible applications
Application options for display data include for example:
• Determination of form variances and transient control errors via the variables for the
• Determination of the voltage noise detected by the A/D converter via the variables for the
The minimum and maximum values are detected in the position controller cycle.
Types of variable
The display data is available both as channel-specific GUD (Global User Data) variables and
as OPI variables.
2.7.1 Channel-specific GUD variables
The "clearance control" technological function provides the following channel-specific GUD
variables for HMI applications:
• SINUMERIK HMI Advanced
• SINUMERIK HMI Embedded
Table 2-1
GUD variables
CLC_DISTANCE[0]
CLC_DISTANCE[1]
CLC_DISTANCE[2]
CLC_VOLTAGE[0]
CLC_VOLTAGE[1]
CLC_VOLTAGE[2]
Once the technological function has been started up successfully, the GUD variables listed
are not displayed automatically on the HMI interface.
42
maximum and minimum position offset/sensor voltage.
maximum and minimum sensor input voltage. This requires a constant clearance
between the clearance sensor and the workpiece surface and the deactivation of
clearance control via CLC_GAIN = 0.0.
Channel-specific GUD variables
Description
Current position offset
Absolute minimum of position
offset
Absolute maximum of position
offset
Current sensor input voltage
Absolute minimum of sensor input
voltage
Absolute maximum of sensor
input voltage
Unit Access
mm read only
mm read/write
mm read/write
V read only
V read/write
V read/write
Special functions: Clearance Control (TE1)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0