4 Technical Information
4.1 Data Synchronization and Switchover (Synchronous)
Data Synchronization: Program Cycle
4.2 Data Synchronization and Switchover (Asynchronous)
Data Synchronization: Program Cycle
4.3 LED States
The RUN and Error LEDs on the PCD3.M6880 show the standby status:
Standby State RUN LED State Error LED State
IDLE * Blink 500ms
STANDBY Blink 2.5s** OFF
ACTIVE - Redundancy * OFF
ACTIVE- Non Redundancy * ON
* normal state of the RUN Led on a PCD
** If CPU0 is in: - Conditional RUN Led blinks 2.5sON/ 500ms OFF
- STOP Led blinks 500msON/ 2.5s OFF
Saia-Burgess Controls AG
User Manual Standby System │ Document 27-645 │ Edition ENG 02 │ 2017-04-26
Data Synchronization and Switchover | LED States
System overview
4-1
4