Siemens sinumerik 840D sl Function Manual page 531

Detailed description
2.5 Startup
2.5.7 Starting up clearance control
Clearance sensor
Connect the clearance sensor outputs to the I/O modules activated via machine data:
• MD10362 $MN_HW_ASSIGN_ANA_FASTIN (I/O address of the I/O module) (hardware
• MD10366 $MN_HW_ASSIGN_DIG_FASTIN (I/O address of the I/O module) (hardware
For more information about I/O modules, see Boundary Conditions, "I/O modules" section.
Test control direction
Proceed as follows to test the control direction of the clearance control function:
• Activate clearance control via a part program with CLC(1) (see "Activating and
• Generate an input voltage, e.g. via the following synchronized action:
N100
N110
N120
N130
Figure 2-10
The voltage specification for the analog output $A_OUTA[6] used in the synchronized action
is subtracted from the clearance sensor input voltage by the clearance control function and
therefore has the opposite polarity to the input signal.
Set the following machine data to induce the clearance control function to use analog output
6 ($A_OUTA[6]) as an additional input overlaid on the sensor input:
MD10366 $MN_CLC_OFFSET_ASSIGN_ANAOUT = 6 (hardware assignment for the
external digital NCK inputs)
26
assignment for the fast analog NCK inputs)
assignment for the external digital NCK inputs)
Deactivating Clearance Control (CLC)" section)
$AC_TIMER[1]=2.5
ID = 1 EVERY $AC_TIMER[1] >= 2.5 DO $AC__TIMER[1]=0
ID = 2 WHENEVER $AC_TIMER[1] < 2.0 DO $A_OUTA[6] = 100000.0
* ($AC_TIMER[1] - 1.0)
ID = 3 WHENEVER $AC_TIMER[1] >= 2.0 DO $A_OUTA[6] = 0.0
Output voltage for synchronized action
Special functions: Clearance Control (TE1)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0