Function-Specific Display Data; Channel-Specific Gud Variables - Siemens SINUMERIK 840D sl Function Manual

11.7

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
maximum and minimum position offset/sensor voltage.
• Determination of the voltage noise detected by the A/D converter via the variables for the
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.
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.
11.7.1

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 11-1
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.
Special Functions
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
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
TE1: Clearance control
11.7 Function-specific display data
Unit Access
mm read only
mm read/write
mm read/write
V read only
V read/write
V read/write
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