SI-Ethernet User Guide 83
Issue: 3
Safety
information
Introduction
Mechanical
installation
Electrical
installation
Getting started
Parameters
Key features
and Protocols
PC Tools
Applications
Security Diagnostics
Glossary of
terms
Index
6.1.5 Menu 11 – Synchronization
This Ethernet interface will be preferred as the grandmaster over others with higher preferred
values or none specified. A value of zero will ensure that the Ethernet interface will not become
grandmaster (making the Ethernet interface act as an IEEE 1588 slave device only). If more than
one Ethernet interface has the same preferred value only one will be chosen as the grandmaster
using the IEEE 1588 BMC algorithm.
The parameter does not guarantee that the Ethernet interface will become grandmaster but a value
of zero guarantees that the Ethernet interface will not become a grandmaster.
Specifies the clock domain for the Ethernet interface to act as a grandmaster clock.
This parameter displays the MAC address, as a 64-bit hexadecimal value, of the synchronization
grandmaster (if there is a grandmaster).
This parameter displays the synchronization jitter in nanoseconds. The value is filtered to be
human readable.
S.11.001 Preferred Sync Master
Minimum 0 Maximum 4
Default 1 Units None
Type 8 Bit User Save Update Rate Read on reset
Display Format None Decimal Places 0
Coding RW, BU
S.11.002 Master Clock Domain
Minimum 0 Maximum 3
Default 0 Units
Type 8 Bit User Save Update Rate Read on reset
Display Format None Decimal Places 0
Coding RW, BU
S.11.005 Grandmaster MAC Address
Minimum
0
(Display: 000000000000)
Maximum
18446744073709551615
(Display: FFFFFFFFFFFF)
Default None Units None
Type 64 Bit Volatile Update Rate Background write
Display Format MAC Address Decimal Places 0
Coding RO, ND, NC, PT, BU
S.11.006 Sync Jitter From Grandmaster
Minimum -2147483648 Maximum 2147483647
Default None Units ns
Type 32 Bit Volatile Update Rate Written every 500ms
Display Format None Decimal Places 0
Coding RO, ND, NC, PT
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