[精品]atv31_modbus_manual_en_v1.pdf

Altivar 31 Modbus User’s manual #### #### #### Contents Presentation ________________________________________________________________________________________________ 3 Connection to RS485 bus ______________________________________________________________________________________ 4 Modbus protocol _____________________________________________________________________________________________ 9 Appendix: Non-standard RS485 schematics_______________________________________________________________________ 14 While every precaution has been taken in the preparation of this document, Schneider Electric SA assumes no liability for any omissions or errors it may contain, nor for any damages resulting from the application or use of the information herein. The products described in this document may be changed or modified at any time, either in appearance or in their operation. Their description can in no way be considered contractual. 2 Presentation The Modbus socket on the Altivar 31 can be used for the following functions: ? Configuration ? Settings ? Control ? Monitoring The ATV31 drive supports: ? The 2-wire RS485 physical layer ? The RTU transmission mode This guide contains information on installation and describes the Modbus services available. The communication variables guide describes the operating modes, as well as the Altivar 31 variables and parameters which can be accessed via the communication bus.