HEIDENHAIN TNC 426 CB, Technical Manual

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7 – 164 HEIDENHAIN Technical Manual TNC 426, TNC 430
7.11.2 Control of Events
The parallel processes can make events available to one another. This saves
computing time otherwise spent in the constant interrogating of operating
states by the individual processes. A special feature of event control is the
waiting period, during which the process can “sleep” for a programmed time.
With this function you can repeat program sections in a slow time grid, for
example for display or monitoring functions.
List of events In the OEM.SYS file, enter the command PLCEVENTS= to enter the complete
name of an ASCII file in which you define the events. The entries in the event
file are listed line by line with the following syntax:
<Job name> ; <condition> ; <event mask>; [comment]
Event Function
<Job name> This name is identical with the label specified with
the spawn command. The TNC evaluates only the
first 16 characters.
<Condition> Logical expression in accordance with the C
language convention, identical with the syntax used
in function FN20. See “Data Transfer PLC
→
NC
Program (Q Parameter)” on page 7 – 22
Operand: M/I/O/T/C/B/W/D with a number that is
permissible for this type
Condition:
== Equal to
!= or <> Not equal to
< Less than
> Greater than
<= Less than or equal to
>= Greater than or equal to
If you enter no condition, the TNC will check for = 0.
<Event mask> Hexadecimally coded mask of events that are
triggered if the condition is fulfilled. The constraints
defined in Module 9260 apply for bits 16 to 31.