HBM QuantumX - Page 28

Introduction
28 A03031_24_E00_01 HBM: public QuantumX
No CX27C module present in the system and no external synchronization
source available:
The module with the highest serial number (UUID) takes over the master func
tion.
CX27C module present in the system and no external synchronization source
available:
If a CX27C module is connected, it automatically becomes the synchronization
master. When starting the system, the system time is set once to the actual
time.
If QuantumX modules alone are being used, internal synchronization is suffi
cient. However, if synchronous measurements are to be performed by different
measurement systems, an external master must be used for synchronization.
Synchronization with external sources
In an external synchronization source is set, the module with the best synchro
nization quality automatically becomes the master and synchronizes all mod
ules connected via IEEE1394b FireWire.
If several external sources are selected, the system decides according to the
following priorities:
1. EtherCAT®
2. IRIG-B
3. NTP
Synchronization via EtherCAT®
The CX27C gateway supports the “Distributed Clocks” expansion of Ether
CAT®. The time is distributed to all EtherCAT® nodes in an EtherCAT® group.
The CX27C module can be synchronized to the EtherCAT® time. This will
mean that all the QuantumX module clocks are synchronized to this time.
Synchronization via an NTP server
Each QuantumX module can synchronize its internal clock with an NTP server.
The NTP time is distributed to the other modules via IEEE1394b FireWire.