Modbus TCP
6.6.1
Installing the Product on an Ethernet Network
1. Connect the Ethernet cable to the device, considering the recommended instructions in network installation,
as described in item 4:
Use shielded cable.
Properly ground network equipment.
Avoid laying communication cables next to power cables.
6.6.2
Configuring the Drive
1. Follow the recommendations described in the user’s manual to program the device parameters related to motor
settings, desired operation mode, I/O signs, etc.
2. Program command sources as desired for application.
3. Program communication parameters such as DHCP, IP address, baud rate, etc.
4. Program the timeout for Modbus TCP communication in parameter P0756.
5. Define which parameters will be read and written at SRW01-ETH smart relay, based on its parameter list. It is
not necessary to define I/O words. The Modbus TCP protocol enables direct access to any device parameter,
and does not distinguish between cyclic and acyclic data. The main parameters that can be used to control
the device, we can mention:
P0680 - Status Word
P0682 - Control Word
6. If necessary, restart the Ethernet interface using P0899.
6.6.3
Configuring the Master
The way you do the network setup is highly dependent on the network master and the network configuration tool.
It is important to know the tools used to perform this activity. In general, the following steps are required to perform
the network configuration.
1. Program the master to read and write holding registers, based on the defined equipment parameters to read
and write. The register number is based on the parameter number, as shown in table 6.4.
2. It is recommended that reading and writing are done in a cyclic manner, allowing detection of communication
errors by timeout.
6.6.4
Communication Status
Once you install the network and program the master, you can use the LEDs and equipment parameters to identify
some states related to communication.
The LEDs ”NET” and ”Link” provide information about the state of the interface and communication.
The parameter P0751 indicates the status of communication between the device and the network master.
The network master must also provide information about communication with slave.
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