Basic Characteristics RAPID

ISignalDO Interrupts from a digital output signal
Examples
Arguments
ISignalDO (Interrupt Signal Digital Out) is used to order and enable interrupts from a
digital output signal.
System signals can also generate interrupts.
VAR intnum sig1int;
CONNECT sig1int WITH iroutine1;
ISignalDO do1,1,sig1int;
Orders an interrupt which is to occur each time the digital output signal do1 is
set to 1. A call is then made to the iroutine1 trap routine.
ISignalDO do1,0,sig1int;
Orders an interrupt which is to occur each time the digital output signal do1 is
set to 0.
ISignalDO\Single, do1,1,sig1int;
Orders an interrupt which is to occur only the first time the digital output signal
do1 is set to 1.
ISignalDO [ \Single ] Signal TriggValue Interrupt
[ \Single ] Data type: switch
Specifies whether the interrupt is to occur once or cyclically.
If the argument Single is set, the interrupt occurs once at the most. If the argument
is omitted, an interrupt will occur each time its condition is satisfied.
Signal Data type: signaldo
The name of the signal that is to generate interrupts.
TriggValue Data type: dionum
The value to which the signal must change for an interrupt to occur.
The value is specified as 0 or 1 or as a symbolic value (e.g. open/close). The signal
is edge-triggered upon changeover to 0 or 1.
RAPID Reference Manual 8-ISignalDO-1