User Manual

Revision March 2008, Doc. Name: 2007PDD23000011 8-1
Chapter 8 MODBUS Communications
8.1 Communication Hardware Interface
The ASDA-AB series servo drive has three modes of communication: RS-232, RS-485, and RS-422. All
aspects of control, operation and monitoring as well as programming of the controller can be achieved via
communication. However, only one communication mode can be used at a time. Users can select the
desired communication mode via parameter P3-05.
Please refer to the following sections for connections and limitations.
RS-232
 Configuration
 Cable Connection