Mitsubishi Electric MEsoftstart/I01 Users, Installation & Instruction Manual page 86

Modbus RTU – Test to see if a driver is required for the Modbus-USB cable
If Modbus TCP is being used, this step may be omitted.
Ensure that the Connection Setup-> Type is on 'Serial' to be able to view the serial Modbus RTU setup parameters. Click on the
down arrow of the "Available COM Ports" drop-down box and make a note of all the COM ports listed.
Connect the computer to the MEsoftstart soft starter – using the cable provided.
i. For the Pro variants: Ensure to connect to J2 or J3 on the bottom (motor-side) of the MEsoftstart enclosure.
ii. For the Core variants: Ensure to connect to J1 or J2 on the top (grid supply-side) of the MEsoftstart enclosure
If the wires are long or communication quality is a problem ensure to use a terminating resistor on the other connector on the
last soft starter in line (if they are daisy-chained) – refer paragraph 0.
Note: If the computer is connected to the internet and offers to find a driver for the new hardware, wait for it to complete the
procedure. You may also point the computer to the driver in the "MEsoftstart Installation files\Driver for Modbus interface"
folder (refer Figure 44).
If nothing happens or once the new driver installation is completed, click on the "Refresh COM ports" button and confirm that a
new COM port was added to the drop-down list of "Available COM Ports".
Figure 48 – MEsoftstart PC Application detects the COM port of the Modbus-USB cable
If the new COM port is not automatically detected, close the MEsoftstart/I PC Interface Application, remove the Modbus-USB
cable. Install the provided driver, reconnect the Modbus-USB cable and start the MEsoftstart PC App again.
86 MEsoftstart PC Interface Application