At a Glance
An integrated interface or the addition of a module automatically enhances the language objects application used to program this interface or module.
These objects correspond to the input/output images and software data of the module or integrated interface.
Reminders
The module
inputs (%I and %IW) are updated
in the PLC memory at the start of the task, the PLC being in RUN or
STOP mode.
The outputs (%Q and %QW) are updated at the end of the task, only when the PLC is in RUN
mode.
NOTE: When the task occurs in STOP mode, either
of the following are possible, depending on the configuration selected:
Outputs are set to fallback position (fallback mode).
Outputs are maintained at their last value (maintain mode).
Illustration
The operating cycle of a PLC task (cyclical execution) looks like this:
