Function-Specific Display Data - Siemens SINUMERIK 840D sl Function Manual

CLC_SEL(...) is a procedure call and must therefore be programmed in a dedicated part
program block.
Characteristic number = 2 selects characteristic 2. Any other value selects characteristic 1
without alarm.
Functionality
CLC_SEL can be used to switch between the sensor characteristics defined in the machine
data.
● Characteristic 1:
– MD62510 $MC_CLC_SENSOR_VOLTAGE_TABLE_1 (coordinate voltage of
– MD62511 $MC_CLC_SENSOR_VELO_TABLE_1 (coordinate velocity of interpolation
● Characteristic 2:
– MD62512 $MC_CLC_SENSOR_VOLTAGE_TABLE_2 (coordinate voltage of
– MD62513 $MC_CLC_SENSOR_VELO_TABLE_2 (coordinate velocity of interpolation
RESET response
Characteristic 1 becomes effective after a power on reset, NC RESET or end of program.
15.7

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.
Special functions
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
interpolation points sensor characteristic 1)
points sensor characteristic 1)
interpolation points sensor characteristic 2)
points sensor characteristic 2)
TE1: Clearance control - 840D sl only
15.7 Function-specific display data
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