Figure 1 shows the correct wiring when you use more than one drive with MEMOBUS/Modbus communications.

Figure 1. Wiring Diagram for More than One Drive
Note:

  1. Set DIP switch S2 to the ON position on the last drive of the MEMOBUS/Modbus communication network to enable the termination resistor.

  2. For long cable runs or multi-floor installations, connect the shield to ground at only one device on the network (at the PLC, if possible) to prevent ground loops. When you remove the shield from the ground terminal, it can increase the communication quality in some drive installation locations.