Siemens SINUMERIK 840D

10
Motion-Synchronous Action 12.97
10.2 Basic modules for conditions and actions
10
840 D
NCU 571
840D
NCU 572
NCU 573
FM-NC 810D 840Di

Siemens AG 2000. All rights reserved
10-352
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
Notes
Only variables of the same data type can be
gated.
Correct: $R10=$AC_PARAM[1]
Incorrect: $R10=$AC_MARKER[1]
Multiplication and division are performed before
addition and subtraction and bracketing of
expressions is permissible.
The operators DIV and MOD are permissible for
the data type REAL (SW 4 and higher).
Example:
DO $AC_PARAM[3] = $A_INA[1]-$AA_IM[Z1]
;Subtraction of two real-time variables
WHENEVER $AA_IM[x2] < $AA_IM[x1]-1.9 DO $A_OUT[5] = 1
;Subtraction of a constant from real-time variable
DO $AC_PARAM[3] = $INA[1]-4*SIN(45.7 $P_EP[Y])*R4
;Constant expression, calculated during preprocessing
•
Indexation
Real-time variables can be indexed with real-time
variables.
Notes
Variables that are not formed in real time must
not be indexed with real-time variables.
Example:
WHEN…DO $AC_PARAM[$AC_MARKER[1]] = 3
Illegal:
$AC_PARAM[1] = $P_EP[$AC_MARKER]
Programming example
Example of real-time expressions
ID=1 WHENEVER ($AA_IM[Y]>30) AND ($AA_IM[Y]<40)
DO $AA_OVR[S1]=80
Selection of a position window
ID=67 DO $A_OUT[1]=$A_IN[2] XOR $AN_MARKER[1]
Evaluate 2 boolean signals
ID=89 DO $A_OUT[4]=$A_IN[1] OR ($AA_IM[Y]>10)
Output of the result of a comparison