Danfoss VLT5000 SyncPos - Page 134

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MG.10.J8.02 – VLT is a registered Danfoss trade mark
Programmable SyncPos motion controller
Software Reference
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■ ON PARAM .. GOSUB
The instruction ON PARAM can be used to respond
when parameters are altered via the VLT display and
to call up a subprogram.
Summary
Call up a subprogram when a parameter is altered.
Syntax
ON PARAM n GOSUB name
Parameter
n = 701 … 779
name =subroutine name
Priority
If, during an interrupt subroutine, the same interrupt
occurs (exception: error interrupt), then it will be
ignored and thus lost.
Peculiarities
The subroutine to be called up must be defined
within the SUBMAINPROG and ENDPROG identified
program.
A maximum of 10 ON PARAM functions are possible.
NB!
During the execution of a subroutine called
by an interrupt NOWAIT is automatically set to
ON.
Command group
INT
Cross Index
SUBPROG…RETURN
Syntax-Sample
LINKAXPAR POSERR 712 „position error“ 300 5000
0
ON PARAM 712 GOSUB poserr
// when position error is changed
SUBMAINPROG
SUBPROG poserr
PRINT „New position error: „, GET POSERR
RETURN
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■ ON PERIOD
With ON PERIOD it is possible to call up a subpro-
gram at regular intervals (time triggered). ON
PERIOD works like an interrupt. It is checked every
20 ms.
Summary
calls up a subroutine at regular intervals
Syntax
ON PERIOD n GOSUB name
Parameter
n > 20 ms = time in ms, after which the subroutine
is called up again
n = 0 = switch off the function
NB!
The precision with which the time is kept
depends on the remaining program. Typically
the precision is ±1 ms.
Peculiarities
The subroutine to be called up must be defined
within the SUBMAINPROG and ENDPROG identified
program.
NB!
During the execution of an ON PERIOD sub-
routine NOWAIT is set to ON.
Command group
INT
Cross Index
ON TIME, GOSUB