Fuji Electric FRENIC-AQUA series User Manual page 14

This chapter describes the specifications common to the Modbus RTU protocol, Fuji general-purpose
inverter protocol, Metasys N2, BACnet, and loader protocol. For further information about the specific
specifications of each protocol, see Chapter 3 "Modbus RTU Protocol" and Chapter 4 "Fuji
General-purpose Inverter Protocol."
2.1 Specifications of RS-485 Communications .............................................................................. 2-1
2.1.1 RJ-45 connector (modular jack) specifications ................................................................ 2-3
2.1.2 Terminal block specifications ........................................................................................... 2-4
2.1.3 Connection cable specifications....................................................................................... 2-5
2.2 Connections ............................................................................................................................. 2-6
2.2.1 Basic connection .............................................................................................................. 2-6
2.2.2 Connection notes ........................................................................................................... 2-10
2.2.3 Connection devices........................................................................................................ 2-13
2.2.4 Measures against noise ................................................................................................. 2-14
2.3 Switching to Communications ................................................................................................ 2-16
2.3.1 Functions for the switching ............................................................................................ 2-16
2.3.2 Link functions (Mode selection) ..................................................................................... 2-17
2.3.3 How to switch communications enabled/disabled ......................................................... 2-18
2.3.4 Loader link functions (Mode selection) .......................................................................... 2-19
2.4 Making RS-485-related Settings ............................................................................................ 2-20
2.4.1 Link function (RS-485 setting)........................................................................................ 2-20
2.5 Selecting Data Clear Processing for Communications Error ................................................. 2-23
COMMON SPECIFICATIONS
Table of Contents
CHAPTER 2