
6 Configuring and Programming the CP as a PROFINET IO Device
Reasons for reinitialization
The PROFINET IO device requests reinitialization by the user program in the following situations:
SThe length information of the input and output areas in the FCs does not match the information configured for this PROFINET IO device on the PROFINET IO system. A change in the length in the FC calls in the user program counts as a configuration change.
SThe CPU or CP changes to STOP mode.
SThe watchdog time was exceeded (see below).
SFollowing a connection abort between the PROFINET IO controller and PROFINET IO device (for example because the PROFINET IO controller was turned off).
Watchdog
FC11 and FC12 each have their own watchdog. Depending on the average CPU cycle time, the connection to the PROFINET IO controller is terminated if one of the two blocks is no longer called following the initialization phase.
CP | B3L−29 |
Release 03/2007 |