Section 2
1MRK 511 429-UEN -
SAM600 Process Bus I/O System
32
SAM600 Process Bus I/O System
Operation Manual
2.3.10
System error announcement
A SAM600 module announces the following locally detected error conditions to all
modules in the SAM600 system:
•
System topology error
•
Loss of synchronization to an external clock
•
Time synchronization state not as configured
•
Digital input voltage error (SAM600-CT and SAM600-VT only)
•
SAM600 system bus link error
•
Fatal module failure
All modules in the SAM600 system will react to an error condition (locally
detected or announced by another module):
If a topology error is announced, the SAM600 module will set the red LED to
steady ON.
If a topology error is announced and the SAM600 module’s time
synchronization mode is
Local,
the sample
synchronization
field value of all
sampled value streams (except bridged streams) on all uplink ports of the
SAM600 module is set to (0).
If a topology error or peer delay error is announced and the SAM600 module’s
time synchronization mode is
Master Clock
and the SAM600 module is
currently not synchronized to an absolute time source, then the sample
synchronization
field value of all sampled value streams (except bridged
streams) on all uplink ports of the SAM600 module is set to (0).
If the sample
synchronization
field value is set to (0) due to either of the
above conditions, then the SAM600-TS module disables all of its PPS output
connectors.
All SAM600 modules in the SAM600 system return to their normal behavior when
the error condition is cleared on the announcing SAM600 module.