Lenze E94P PositionServo with MVOB - Manual (Page 89)

PM94H201B_13xxxxxx_EN L 87
Reference
Table 30: EVENT
EVENT Starts Event handler Statement
Purpose EVENT keyword is used to create scanned events within the user program.
Statement also sets one of 4 possible types of events.
Syntax Any one of the 4 syntax examples herein may be used:
1.
EVENT <name> INPUT <inputname> RISE
2. EVENT <name> INPUT <inputname> FALL
3. EVENT <name> TIME <period>
4. EVENT <name> <expression>
name any valid alphanumeric string
inputname any valid input “IN_A1 - IN_C4”
period any integer number. Expressed in ms
expression any arithmetic or logical expression
The following statements can not be used within event’s handler:
MOVE MOVED MOVEP MOVEDR
MOVEPR MDV MOTION SUSPEND MOTION RESUME
STOP MOTION DO/UNTIL GOTO GOSUB
HALT VELOCITY ON/OFF WAIT WHILE/ENDWHILE
ASSIGN END ON FAULT/END FAULT RESUME
RETURN
While GOTO or GOSUB are restricted, a special JUMP statement can be used for program flow change from
within event handler. See JUMP statement description in Language Reference section.
Program labels are also not permitted within event code.
Remarks
For syntax 1 and 2:
The Event will occur when the input defined by the <name> transition from low to high, for syntax 1 (RISE) and from high to
low for syntax 2 (FALL).
For syntax 3:
The Event will occur when the specified , <period>, period of time has expired. This event can be used as periodic event to
check for some conditions.
For syntax 4
The Event will occur when the expression, <expression>, evaluates to be true. The expression can be any valid arithmetic
or logical expression or combination of the two. This event can be used when implementing soft limit switches or when
changing the program flow based on some conditions. Any variable, (user and system), or constants can be used in the
expression. The event will only trigger when the logic transitions from False to True. Further occurrence of the event will not
occur while the condition remains true.
See Also ENDEVENT, EVENT ON/OFF, EVENTS ON/OFF
Example:
EVENT InEvent IN_A1 RISE
V0 = V0+1 ;V0 increments by 1 each time IN_A1 transitions from low to high
ENDEVENT
EVENT period TIME 1000 ;1000 ms = 1Sec
V3=V0-V1 ;Event subtracts V1 from V0 and stores result in V3 every second
ENDEVENT
;------------------------------------------------------------------------------
EVENT InEvent ON ;Statements in main program to turn individual events on
EVENT period ON
{program statements}
END