4.6.3 ABB SMARTWINCH MODBUS TCP
Available from firmware 3.12 and hardware version 8.5
The ABB MODBUS protocol is transmitted by the SMC motion sensor via MODBUS TCP protocol
standard. The motion sensor is the Master in the hierarchy.
The SMC IMU configuration software cannot be used to read the output data from the TCP Modbus
protocol. Settings of parameters and features can be done from the configuration software when the
TCP protocol is selected both over the ethernet and using the serial communication.
The ABB Smart Winch Protocol can be combined with the SMC ethernet protocol 1 UDP. In this case
the UDP message will be read by the IMU Configuration Software.
Data from the SMC motion sensor sent via MODBUS TCP can be read on the target devices with the
Target IP address set from the SMC IMU Configuration software.
The MODBUS TCP exchange is a standard three-way handshake, as follows
The motion sensor reads the MAC address of the Target IP
• the motion sensor initiates the TCP handshake with a sync request to the target device
• the target device acknowledges the sync request
• the motion sensor acknowledges the target device sync acknowledge
After the handshake is finalized the SMC motion sensor will start sending packets to the selected
target devices automatically.
When the session is established between the target device and the motion sensor, the motion sensor
will continue to send its messages in the output rate selected and would not wait for the target
packet received acknowledgement before sending its next message string.
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