Synchronization; Step By Step Instruction Of Cx27 With Twincat3 - HBM QuantumX CX27C Bedienungsanleitung

6.2.5

Synchronization

For the timing of all nodes in the network it is important for all of them to be
exactly synchronized if simultaneous actions are required for widely distributed
processes. The synchronization process based on the Distributed Clock con­
cept is used to transfer the timing of the master clock signal via the EtherCAT
network to the slave clock generator and to align it to compensate for a time
offset. The main clock generator in an EtherCAT group is in a slave device,
because the master should deliberately be assigned to standard components.
All nodes can then be synchronized with an error of less than 1 ms.
The "Distributed Clocks" option can be activated and deactivated by a corre­
sponding tag in the ESI. If "Distributed Clocks" is activated, the timing master
forwards the time to the QuantumX slave, which distributes the timing to the
modules.
The Distributed Clock concept is also useful when measurements will be per­
formed in parallel via Ethernet and same time stamp will be acquired as a ref­
erence value.
If the master does not support the "Distributed Clocks" option, the time is set to
zero when the module is started up and timing begins from there on.
The EtherCAT CX27 slave connects the powerful, modular QuantumX data
acquisition system to this fieldbus with up to 199 time-synchronized signals.
The maximum sample rate here is 1200 Hz. It is also possible to provide
30 signals at a rate of 4800 Hz.
Up to 3 Sync Managers can be assigned.
CX27 operates with the "SYNC 0" pulse. The cycle time can be set up to the
magnitude of 125 μs. Smaller values cause the loss of real-time data.
6.3

Step by step instruction of CX27 with TwinCAT3

CX27 is able to route the QuantumX measurement values to EtherCAT. To do
so, configuration on the QuantumX side and the EtherCAT side is necessary.
This document describes briefly the appropriate steps needed to transfer
QuantumX measurement data and make it visible on TwinCAT3.
CX27C
A02720_04_X00_00 HBM: public
EtherCAT
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