IC3645LXCD1TT燃機模塊,IC3645LXCD1TT產(chǎn)品重量
模塊的尺寸和連接器以及RS-485鏈路。它還解釋了如何使用狀態(tài)跟蹤故障FMBA-01 Modbus適配器模塊上的LED。
本手冊中使用的術(shù)語(yǔ)通信模塊通信模塊是設備的名稱(chēng)（例如現場(chǎng)總線(xiàn)適配器），驅動(dòng)器通過(guò)適配器連接到外部
通信網(wǎng)絡(luò )（如現場(chǎng)總線(xiàn)）。與的通信該模塊通過(guò)驅動(dòng)參數激活。
FMBA-01 Modbus適配器模塊
FMBA-01 Modbus適配器模塊是可選模塊之一
IC3645LXCD1TT燃機模塊ABB驅動(dòng)器可用的現場(chǎng)總線(xiàn)適配器模塊。FMBA-01是一種將ABB驅動(dòng)器連接到RS-485的設備
網(wǎng)絡(luò )概述本章簡(jiǎn)要介紹RS-485標準和FMBA-01 Modbus適配器模塊清單
RS-485標準RS-485是一種串行接口標準，用于通過(guò)
雙絞線(xiàn)電纜。因為RS-485信號傳輸差分，它提供更好的噪音保護和更長(cháng)的時(shí)間
傳輸距離大于RS-232。RS-485為半雙工多點(diǎn)網(wǎng)絡(luò )，這意味著(zhù)可以駐留多個(gè)設備在線(xiàn)。在任何給定時(shí)間，只能有一個(gè)發(fā)射器處于激活狀態(tài)。
RS-485標準僅規定了電氣特性總線(xiàn)系統的。通信協(xié)議和
通信速度取決于使用的應用程序。對于PROFIBUS的電氣特性示例和MODBUS基于RS-485標準。
RS-485傳輸線(xiàn)由兩根導線(xiàn)A和B組成信號傳輸基于電線(xiàn)。檢測到的最小電壓差為200 mV。這個(gè)
兩條導線(xiàn)之間的電位差決定邏輯狀態(tài)位：當B的電壓高于A(yíng)時(shí)，狀態(tài)定義為
位1（數據高），當A的電壓高于B時(shí)，狀態(tài)定義為位0（數據低位）。
RS-485網(wǎng)絡(luò )設備之間的共模電壓為限制為-5+12 V.地線(xiàn)和電纜屏蔽應連接以防止網(wǎng)絡(luò )之間的共模電壓防止設備漂移超出允許范圍。
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).
