Table of Contents
Advertisement
Configuring
• synchronized processing and
• extremely fast data transfer
between two SIMATIC FM 458 modules each with two EXM 448-1
expansion modules.
Cyclic or interrupt
When selecting the operating mode, it should be noted, that interrupt task
processing can interrupt cyclic tasks at any time. This can influence the
task ?
timing. For the non-synchronous mode, the SIMOLINK cycle is delayed
and for the external cyclic mode, T0 must be adapted to prevent
computation time overflow or multiple sending of the same values which
have not been re-calculated.
Synchronization to the base sampling time T0 can be set in 100 µs
intervals while interrupt tasks are initiated by the SYNC telegram,
dependent on the telegram duration.
4-20
Application Module FM 458 - User Manual
6DD1904-0AE0
Edition 12.2001
Advertisement
Table of Contents
