Siemens SINUMERIK 828D Function Manual page 74

Detailed description
2.7 Actions in synchronized actions
Figure 2-6
Determining the parameters of the
FCTDEF(<Poly_No>,<Lo_Limit>,<Up_Limit>,a
<Poly_No>
<Lo_Limit>
<Up_Limit>
a :
0
a
1
a
2
a
3
Calculation of the override value:
SYNFCT(<Poly_No>,<SysVar_Out>,<SysVar_In>)
<Poly_No>
<SysVar_Out>
<SysVar_In>
74
Clearance control
: = 1 (example)
: = 0.2
: = 0.5
Polynomial: f(x) = a
10 / x = 20 / 0.3 ⇒ a
= 0.15 mm / 10 V = 1.5 * 10
= 0 (no square component)
= 0 (no cubic component)
: = 1
: $AA_OFF
: $A_INA (analog input)
function:
FCTDEF
0 ,a 1 ,a 2 ,a 3 )
+ a x +a x + a
2
0 1 2
= x + 0.2 = 0.15 + 0.2 = 0.35
0
mm/V
-2
overlaid movement of an axis)
(
Function Manual, 07/2012, 6FC5397-5BP40-3BA0
x
3
3
Synchronized actions