Siemens SINUMERIK 840D sl Programming Manual page 36

Flexible NC programming
1.1 Variables
If the implicit initialization value is outside the definition range specified by the programmed
limit values, the variable is initialized with the limit value which is closest to the implicit
initialization value:
● Implicit initialization value < lower limit value (LLI) ⇒
● Implicit initialization value > upper limit value (ULI) ⇒
Examples:
Program code
DEF REAL GUD1
DEF REAL LLI 5.0 GUD2
DEF REAL ULI –5 GUD3
Redefinition (REDEF) of user variables: Limit values and current actual values
If, when the limit values of a user variable are redefined, they change to the extent that the
current actual value is outside the new definition range, an alarm will be issued and the limit
values will be rejected.
Note
Redefinition (REDEF) of user variables
When the limit values of a user variable are redefined, care must be taken to ensure that the
following values are changed consistently:
 Limit values
 Actual value
 Initialization value on redefinition and automatic reinitialization on the basis of INIPO,
See also
Variables (Page 17)
36
initialization value = lower limit value
initialization value = upper limit value
INIRE or INICF
Comment
; Lower limit value = definition range limit
; Upper limit value = definition range limit
; No initialization value programmed
; => Implicit initialization value = 0.0
; Lower limit value = 5.0
; Upper limit value = definition range limit
; => Initialization value = 5.0
; Lower limit value = definition range limit
; Upper limit value = -5.0
; => Initialization value = -5.0
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
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