IC3645LXCD1TT燃機(jī)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(cè)中使用的術(shù)語通信模塊通信模塊是設(shè)備的名稱（例如現(xiàn)場(chǎng)總線適配器），驅(qū)動(dòng)器通過適配器連接到外部
通信網(wǎng)絡(luò)（如現(xiàn)場(chǎng)總線）。與的通信該模塊通過驅(qū)動(dòng)參數(shù)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(jī)模塊ABB驅(qū)動(dòng)器可用的現(xiàn)場(chǎng)總線適配器模塊。FMBA-01是一種將ABB驅(qū)動(dòng)器連接到RS-485的設(shè)備
網(wǎng)絡(luò)概述本章簡(jiǎn)要介紹RS-485標(biāo)準(zhǔn)和FMBA-01 Modbus適配器模塊清單
RS-485標(biāo)準(zhǔn)RS-485是一種串行接口標(biāo)準(zhǔn)，用于通過
雙絞線電纜。因?yàn)镽S-485信號(hào)傳輸差分，它提供更好的噪音保護(hù)和更長(zhǎng)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)，這意味著可以駐留多個(gè)設(shè)備在線。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(biāo)準(zhǔn)僅規(guī)定了電氣特性總線系統(tǒng)的。通信協(xié)議和
通信速度取決于使用的應(yīng)用程序。對(duì)于PROFIBUS的電氣特性示例和MODBUS基于RS-485標(biāo)準(zhǔn)。
RS-485傳輸線由兩根導(dǎo)線A和B組成信號(hào)傳輸基于電線。檢測(cè)到的最小電壓差為200 mV。這個(gè)
兩條導(dǎo)線之間的電位差決定邏輯狀態(tài)位：當(dāng)B的電壓高于A時(shí)，狀態(tài)定義為
位1（數(shù)據(jù)高），當(dāng)A的電壓高于B時(shí)，狀態(tài)定義為位0（數(shù)據(jù)低位）。
RS-485網(wǎng)絡(luò)設(shè)備之間的共模電壓為限制為-5+12 V.地線和電纜屏蔽應(yīng)連接以防止網(wǎng)絡(luò)之間的共模電壓防止設(shè)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).
