PROFIBUS DP master systems respond at the same time, the time stamps of these signal
changes may not differ by more than this selected accuracy.
Time synchronization
Time synchronization ensures that all the clocks in a system are set to the same time-of-day.
A master clock distributes the time in a configurable cycle to all other components in the system
that have a clock. The components use this time to set their own clocks.
Value status
The value status is additional binary information in a digital input signal. The value status is
entered in the PII at the same time as the process signal, and provides information on the
validity of the input signal.
WinCC
PCS 7 standard package
Glossary
ET 200iSP
Operating Instructions, 11/2017, A5E00247483-07
371
Содержание SIMATIC ET 200iSP
Страница 82: ...Configuration options 3 18 Redundancy with IM 152 ET 200iSP 82 Operating Instructions 11 2017 A5E00247483 07 ...
Страница 184: ...Commissioning and Diagnostics 6 8 Diagnostics with STEP 7 ET 200iSP 184 Operating Instructions 11 2017 A5E00247483 07 ...
Страница 194: ...Maintenance 7 7 Reading service data ET 200iSP 194 Operating Instructions 11 2017 A5E00247483 07 ...
Страница 220: ...Terminal modules 9 6 Terminal module TM RM RM ET 200iSP 220 Operating Instructions 11 2017 A5E00247483 07 ...
Страница 372: ...Glossary ET 200iSP 372 Operating Instructions 11 2017 A5E00247483 07 ...
Страница 384: ...Index ET 200iSP 384 Operating Instructions 11 2017 A5E00247483 07 ...