Siemens sinumerik 840D sl Function Manual page 539

Detailed description
2.6 Programming
2.6.2 Closed-loop control gain (CLC_GAIN)
Syntax
CLC_GAIN =
Factor
• Format: Real
• Range of values: y 0.0
CLC_GAIN is an NC address and can therefore be written together with other instructions in
a part program block.
When a negative factor is programmed, the absolute value is used without an alarm output.
Functionality
The current closed-loop control gain for clearance control is produced by the active
characteristic specified via machine data:
• MD62510 $MC_CLC_SENSOR_VOLTAGE_TABLE1 (coordinate voltage of interpolation
• MD62511 $MC_CLC_SENSOR_VELO_TABLE1 (coordinate velocity of interpolation
• MD62512 $MC_CLC_SENSOR_VOLTAGE_TABLE2 (coordinate voltage of interpolation
• MD62513 $MC_CLC_SENSOR_VELO_TABLE2 (coordinate velocity of interpolation
points sensor characteristic 2)
CLC_GAIN can be used to multiply the closed-loop control gain of the characteristic by a
programmable factor.
Caution
Increasing the gain (CLC_GAIN > 1.0) may lead to oscillation in the controlled axes!
Instant of activation
The modified closed-loop control gain is effective in the part program block in which
CLC_GAIN has been programmed or, if this block does not contain any executable
instructions, in the next part program block with executable instructions.
Response to characteristic changeover
The programmed factor remains active even when the gain characteristic is changed over
with CLC_SEL, i.e. it is immediately applied to the newly selected characteristic.
34
Factor
points sensor characteristic 1)
points sensor characteristic 1)
or
points sensor characteristic 2)
Special functions: Clearance Control (TE1)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0