IC3645LXCD1TT燃机模块,IC3645LXCD1TT产品重量
模块的尺寸和连接器以及RS-485链路。它还解释了如何使用状态跟踪故障FMBA-01 Modbus适配器模块上的LED。
本手册中使用的术语通信模块通信模块是设备的名称（例如现场总线适配器），驱动器通过适配器连接到外部
通信网络（如现场总线）。与的通信该模块通过驱动参数激活。
FMBA-01 Modbus适配器模块
FMBA-01 Modbus适配器模块是可选模块之一
IC3645LXCD1TT燃机模块ABB驱动器可用的现场总线适配器模块。FMBA-01是一种将ABB驱动器连接到RS-485的设备
网络概述本章简要介绍RS-485标准和FMBA-01 Modbus适配器模块清单
RS-485标准RS-485是一种串行接口标准，用于通过
双绞线电缆。因为RS-485信号传输差分，它提供更好的噪音保护和更长的时间
传输距离大于RS-232。RS-485为半双工多点网络，这意味着可以驻留多个设备在线。在任何给定时间，只能有一个发射器处于激活状态。
RS-485标准仅规定了电气特性总线系统的。通信协议和
通信速度取决于使用的应用程序。对于PROFIBUS的电气特性示例和MODBUS基于RS-485标准。
RS-485传输线由两根导线A和B组成信号传输基于电线。检测到的最小电压差为200 mV。这个
两条导线之间的电位差决定逻辑状态位：当B的电压高于A时，状态定义为
位1（数据高），当A的电压高于B时，状态定义为位0（数据低位）。
RS-485网络设备之间的共模电压为限制为-5+12 V.地线和电缆屏蔽应连接以防止网络之间的共模电压防止设备漂移超出允许范围。
contains information on physical
dimensions and connectors of the module and the specification of
the RS-485 link. It also explains how to trace faults with the status
LEDs on the FMBA-01 Modbus Adapter module.
Terms used in this manual
Communication Module
Communication Module is a name for a device (e.g. a fieldbus
adapter) through which the drive is connected to an external
communication network (e.g. a fieldbus). The communication with
the module is activated with a drive parameter.
FMBA-01 Modbus Adapter module
The FMBA-01 Modbus Adapter module is one of the optional
fieldbus adapter modules available for ABB drives. The FMBA-01
is a device through which an ABB drive is connected to a RS-485
network.Overview
This chapter contains a short description of the RS-485 standard
and the FMBA-01 Modbus Adapter module, and a delivery
checklist.
RS-485 standard
RS-485 is a serial interface standard for communication over a
twisted-pair cable. Because the RS-485 signal transmission is
differential, it provides better protection against noise and longer
transmission distances than the RS-232. RS-485 is a half-duplex
multi-drop network, which means that multiple devices may reside
on line. Only one transmitter may be active at any given time.
The RS-485 standard specifies only the electrical characteristics
of the bus system. The communication protocol and
communication speed depend on the used application. For
example the electrical characteristics of the PROFIBUS and
MODBUS are based on the RS-485 standard.
The RS-485 transmission line consists of two wires, A and B. The
signal transmission is based on the voltage difference between
the wires. Minimum detected voltage difference is 200 mV. The
potential difference between the two wires determines the logic
state bit: when B is at higher voltage than A, the state is defined as
bit 1 (data high) and when A is at higher voltage than B, the state
is defined as bit 0 (data low).
