Vishay G4-DT, Техническое руководство, Страница: 94 / 174

Technical Manual
7-2
Setup of Modbus RTU communication
•
The instrument will as default be given the address 1. If more than one instrument is
used in a network, each G4 instrument must be given a unique address in
parameter ‘Modbus address’ (in ‘Parameter set-up’, menu ‘Communication’,
sub menu ‘Serial Com’).
•
Set parameter ‘COMx:Mode’ to ‘Modbus slave’.
•
Select correct baud rate and data format in parameter ‘COMx:Baudrate’ and
‘COMx:Data format’.
•
Select wanted type of float values in parameter ‘COMx:Float Format’.
•
When longer response times are needed, set ‘COMx:Min Reply Time’ to a suitable
value.
Modbus TCP Slave
General
The Ethernet communication port can be used to communicate with the instrument
using the Modbus TCP protocol. The instrument is a Modbus TCP slave and will only
respond to incoming messages from a master.
See ‘7. Communication
−
Modbus protocol’ section for detailed information of
register numbering, register content definition, commands etc.
More information about Modbus TCP can be found at ‘www.modbus-ida.com’ and
many other places.
Setup of Modbus TCP Slave communication
•
Network configuration (IP-address, netmask,….) must be done from menu ‘Network
Configuration’.
•
Enable the Modbus TCP Slave by setting parameter ‘Modbus TCP Slave’ to ‘On’ in
menu ‘Ethernet’.
•
Select wanted type of float values in parameter ‘Floating Point Format’ (in menu
‘Ethernet’).