Rockwell Automation 20-COMM-M Modbus/TCP Adapter - Manual (Page 30)

3-8 Configuring the Adapter
20-COMM-M Modbus/TCP Adapter User Manual
Publication 20COMM-UM014C-EN-P
Setting the Data Rate By default, the adapter is set to autodetect, so it automatically detects the
data rate and duplex setting used on the network. If you need to set a
specific data rate and duplex setting, the value of Parameter 16 - [EN Rate
Cfg] determines the Ethernet data rate and duplex setting that the adapter
will use to communicate. For definitions of data rate and duplex, refer to the
Glossary .
1. Set the value of Parameter 16 - [EN Rate Cfg] to the data rate at which
your network is operating.
Figure 3.9 Example Ethernet Rate Cfg LCD HIM Screen
2. Reset the adapter (see Resetting the Adapter on page 3-12 ).
Setting the I/O
Configuration The I/O configuration determines the data that is sent to and from the drive.
Logic Command/Status, Reference/Feedback, and Datalinks may be
enabled or disabled. A “1” enables the I/O. A “0” disables the I/O.
1. Set the bits in Parameter 24 - [DPI I/O Cfg].
Figure 3.10 Example DPI I/O Cfg LCD HIM Screen
Bit 0 is the right-most bit. In Figure 3.10 , it is highlighted and equals “1.”
2. If Logic Command/Reference is enabled, configure the parameters in
the drive to accept the Logic Command and Reference from the adapter.
For example, set Parameter 90 - [Speed Ref A Sel] in a PowerFlex 70 or
700 drive to “22” (DPI Port 5) so that the drive uses the Reference from
the adapter. Also, verify that the mask parameters (for example,
Parameter 276 - [Logic Mask]) in the drive are configured to receive the
desired logic from the adapter. Refer to the documentation for your
drive for details.
Value Data Rate
0 Autodetect (default)
1 10 Mbps Full
2 10 Mbps Half
3 100 Mbps Full
4 100 Mbps Half
Port 5 Device
20-COMM-M
Parameter #: 16
EN Rate Cfg
0
Autodetect
TIP: Auto detection of baud rate and duplex works properly only if the
device (usually a switch) on the other end of the cable is also set to auto
detect the baud rate/duplex. If one device has the baud rate/duplex hard
coded, the other device must be hard-coded to the same settings.
Bit Description
0 Logic Command/Reference (Default)
1 Datalink A
2 Datalink B
3 Datalink C
4 Datalink D
5…15 Not Used
Port 5 Device
20-COMM-M
Parameter #: 24
DPI I/O Cfg
x x x x x x x x x x x 0 0 0 0
1
Cmd/Ref b00