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Technical description
6 Communication
6.2 Communication protocols
VM59.EN001
VAMP 24h support phone +358 (0)20 753 3264
161
6.2.
Communication protocols
The protocols enable the transfer of the following type of data:
events
status information
measurements
control commands.
clock synchronizing
6.2.1.
PC communication
PC communication is using a VAMP specified command line
interface. The VAMPSET program can communicate using the
local USB-port or using optional ethernet interface. For
ethernet interface configuration see chapter 6.1.4.
6.2.2.
Modbus TCP and Modbus RTU
These Modbus protocols are often used in power plants and in
industrial applications. The difference between these two
protocols is the media. Modbus TCP uses Ethernet and Modbus
RTU uses asynchronous communication (RS-485, optic fibre,
RS-232).
VAMPSET will show the list of all available data items for
Modbus. A separate document “Modbus data.pdf“ is also
available.
The Modbus communication is activated usually for remote
port via a menu selection with parameter "Protocol". See
chapter 6.1.
For ethernet interface configuration see chapter 6.1.4.
Parameters
Parameter
Value
Unit Description
Note
Addr
1
247
Modbus address for the
device.
Broadcast address 0 can
be used for clock
synchronizing. Modbus
TCP uses also the TCP
port settings.
Set
bit/s
1200
2400
4800
9600
19200
bps
Communication speed for
Modbus RTU
Set
Parity
None
Even
Odd
Parity for Modbus RTU
Set
Set = An editable parameter (password needed)
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