YOKOGAWA VZ20X, Руководство пользователя

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IM 77V01B01-01EN 5th Edition: 2023.03.07-00
Note
To synchronize the time on the PC and PLC
The date and time on the VZ20X can be synchronized with the date and time on the
PC/PLC by periodically writing the time.
The accuracy of the time on the VZ20X is ±5 ppm. To resolve time differences with the
PC/PLC, write the time to the VZ20X whenever required.
Note, however, that the time stamp is omitted or set in duplicate when the time has been
acquired from the PC/PLC.
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Connection type
Sets the connection type. When performing time synchronization, correctly set the
connection type.
Connection
type
Descriptions
Port 1 connection
destination
Port 2 connection
destination
1 unit
Time synchronization between
VZ20X's is not performed.
Connection with a host
device such as PC/PLC,
etc.
Connection with port 1 of
VZ20X Connection type is
"1 unit."
Master unit of
daisy chain
This is used as the master of the
time internally on the VZ20X when
time synchronization is performed.
The master is one VZ20X unit in
the daisy chain connection.
Connection with a host
device such as PC/PLC,
etc.
VZ20X relay unit of daisy
chain or terminal unit of
daisy chain.
Connection with port 1.
Relay unit of
daisy chain
Relaying is performed between the
master and terminal unit in a daisy
chain connection. Time follows the
time setting of the master unit in
the daisy chain.
VZ20X Master unit of daisy
chain or VZ20X Relay unit
of daisy chain.
Connection with port 2.
VZ20X Relay unit of daisy
chain or VZ20X Terminal
unit of daisy chain.
Connection with port 1.
Terminal unit of
daisy chain
The terminal unit functions as the
final unit at the end of a daisy chain
connection. Time follows the time
setting of the master unit in the
daisy chain.
VZ20X Master unit of daisy
chain or VZ20X Relay unit
of daisy chain.
Connection with port 2.
Unusable
PC/PLC VZ20X
Date and time are
handed over.
VZ20X power supply on
VZ20X time is synchronized
when the time is received from
the PC/PLC.
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Date and time are
handed over.
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6
3 9
Date and time are
handed over.
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6
3 9
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6
3 9
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3 9
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6
3 9
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3 9