Basic Characteristics RAPID

Example
Limitations
Syntax
If the interrupt occurs cyclically, a new computation of time is started from when the
interrupt occurs.
VAR intnum timeint;
CONNECT timeint WITH check_serialch;
ITimer 60, timeint;
.
TRAP check_serialch
WriteBin ch1, buffer, 1;
IF ReadBin(ch1\Time:=5) < 0 THEN
TPWrite “The serial communication is broken”;
EXIT;
ENDIF
ENDTRAP
Communication across the ch1 serial channel is monitored by means of interrupts
which are generated every 60 seconds. The trap routine checks whether the communication
is working. If it is not, program execution is interrupted and an error
message appears.
The same variable for interrupt identity cannot be used more than once, without being
first deleted. See Instructions - ISignalDI.
ITimer
[ ’\’Single ’,’]
[ Time ’:=’ ] < expression (IN) of num >’,’
[ Interrupt ’:=’ ] < variable (VAR) of intnum > ’;’
Related information
Described in:
Summary of interrupts RAPID Summary - Interrupts
More information on interrupt management Basic Characteristics- Interrupts
8-ITimer-2 RAPID Reference Manual