ABB AC800M PROFIBUS DP Installation System

ABB AC800M  PROFIBUS DP Installation System

Fieldbus systems are used as a means of communications for serial data exchange

between decentralized devices on the field level and the controller of the process

supervision level.

PROFIBUS means PROcess FIeldBUS, designed as a fieldbus for process

automation purposes for interconnecting Decentralized Peripheral devices

(PROFIBUS DP), and its extended version for Process Automation (PROFIBUS

PA). It is well known all over the world and the most popular fieldbus in Europe.

Due to its high data transmission rates over short distances and moderate ones over

long distances it is predominantly used for interconnecting I/O units like S800 /

S900 or smart devices to PLCs and controller like AC 800M.

This user manual provides a brief overview of the PROFIBUS technology, to help you

by planning, commissioning and testing. It does not release you from the necessity to

observe the relevant standards. The valid version of the EMC directive and other

PROFIBUS guidelines and the shield and grounding directives, particular for

PROFIBUS-PA must be observed.

PROFIBUS is a manufacturer-independent fieldbus standard for applications in

manufacturing, process and building automation. PROFIBUS technology is

described in fixed terms in DIN 19245 as a German standard and in EN 50170 / IEC

61158 as an international standard. It specifies the technical and functional

properties of a serial bus system. The PROFIBUS standard is thus available to every

provider of automation product.

PROFIBUS distinguishes between master and slave. The masters determine the data

communication on the bus. A master can send messages without an external request

if it has access rights to the bus (token). The slaves are peripheral devices. Typical

slaves are I/O devices, valves, motors and transmitters. They have no bus access

rights. They can only confirm received messages or send a message on the request

of the master. Slaves are passive devices on the PROFIBUS.

PROFIBUS is composed of three types of protocol, each of which is used for

different tasks. Of course, devices with all three protocols can communicate with

each other in a complex system by means of a PROFIBUS network.

The three types of protocols are: PROFIBUS FMS, DP, PA.

Communication Protocols

At the protocol level, PROFIBUS offers a broad spectrum of options, which enables

optimum communication between different applications. PROFIBUS DP is a fast

and deterministic process data exchange between a PROFIBUS master and the

assigned slave devices.

Presently the basic and extended functions supported with AC 800M/CI854(A) are:

• Basic function (V0):

– Cyclic data transfer

– Diagnostic

– Configuration via GSD files

• Extended function V1:

– Acyclic data transfer

– Alarm handling (planned, but not supported yet)

– FDT/DTM device management

– Function blocks acc. IEC 61131-3

RS485 installation recommendation

Problems with data transmission in PROFIBUS networks can be attributed to

incorrect wiring or installation. These problems can often be solved using bus test

equipment such as bus monitors, which are able to detect many typical wiring errors

even before commissioning.

The list below helps to build up a RS485 network quick and accurate:

• Only use shielded and twisted-pair wiring as a RS485 bus line.

• Use a PROFIBUS bus connector plug to connect the RS485 bus segment.

• If the module is at the beginning or end of a bus segment, this connector must

have an activated bus terminal resistor combination.

• Ensure that the bus segment connected to the RS485 interface is terminated at

both ends.

• All PROFIBUS bus connector plugs in a network must be securely screwed

onto the RS485 interfaces.

• Attaching or removing the bus connector plugs, inadequately attached bus

connector plugs or loose bus wires within the plug can lead to malfunctions in

the networks.

• Attach or remove the RS485 bus connector plug quickly and without twisting

them.

The hardware units which form the AC 800M Controller are:

• Processor units (including base plates)

• Communication interfaces for different protocols (including base plates)

• Power supply units, providing various power output levels

• Battery back-up unit

• For High Integrity systems control applications with AC 800M HI, special module

SM812, is needed

Once configured, the AC 800M hardware platform effectively becomes the AC 800M

Controller.

Equipped with the specified Control Software, the AC 800M Controller can be used for

all kinds of process and industrial automation applications. With Control Software, the

controller can act either as a stand alone process controller or as a controller, performing

local control tasks, in a control network consisting of many interconnected computers.

The AC 800M Controller is delivered without firmware. To provide the controller with

Control Software, it will first be necessary to load the firmware and create

the application separately by using the Control Builder interface.

The major features of the AC 800M are:

•High performance and large application memory.

•Extensive availability.

•CPU redundancy (PM858/PM861/PM862/PM864/PM865/PM866/PM867/PM891).

•AC 800M High Safety Integrity Level 2 certified using PM865/SM810/SM811 or PM867/SM812.

•AC 800M High Safety Integrity Level 3 certified using PM865/SM811 or PM867/SM812.

•Built-in redundant Ethernet channels.

•Built-in RS-232C channels.

•Sectioned CEX-Bus using a pair of BC810 / BC820.

•Quick and simple fault-finding with the aid of LEDs on each unit / channel.

•Built-in battery back-up of memory (except for PM891).

•External battery back-up.

•Use of industry standard power supply voltage - 24V d.c.

•Easy mounting on standard DIN rail.

•IP20 Class protection without the requirement for enclosures.

•Incorporation of a wide variety of communication possibilities.

•Hardware based on standards for optimum communication connectivity (Ethernet, PROFIBUS DP).

•Support for PROFIBUS DP fieldbus.

•Support for FOUNDATION Fieldbus.

•Support for Advant Fieldbus 100.

•Support for Modbus TCP.

•Support for Field Device Tool (FDT) and Device Type Manager (DTM) concept for tool routing of HART instruments.

•Support for connection to INSUM via Gateway (Ethernet/LON).

•Support for IEC 61850.

•Support for PROFINET IO.

•Support for EtherNet/IP.

•Support for connection to S100 I/O.

•Support for connection to Satt I/O.

•Support for TRIO/Genius.

•Support for Genius remote I/O discrete, analog and high-speed counter blocks.

•Support for ABB Drives via PROFIBUS, ModuleBus and DriveBus.

•Support for connection to MasterBus 300.

•Full EMC certification.

•Selected units UL certified (UL508 as open equipment, and for hazardous locations according to UL60079-15 (Class 1 Zone 2)).

PM851 is equivalent to PM856 unless stated otherwise.

PM861A, PM864A, PM866A are equivalent to PM861, PM864 and PM866 respectively, unless stated otherwise.

The processor unit (except PM891) consists of two parts:

•Processor unit, PM851/PM851A/PM856/PM856A/PM858/PM860/PM860A/PM861/

PM861A/PM862/PM864/PM864A/PM865/PM866/PM866A/PM867, equipped with power supply and CPU-boards

There are several methods of connecting I/O systems to the AC 800M Controller:

•S100 I/O via CI856.

•S800 I/O units via the ModuleBus. Support for hot configuration during run, redundancy on all levels, HART routing, and Sequence-of-Events (SOE).

•S800 I/O units via CI854/CI854A/CI854B and CI840, PROFIBUS DP. Support for HART routing, redundancy on all levels, and hot configuration during run.

•S800 I/O units via CI854/CI854A/CI854B and CI801, PROFIBUS DP. Support for HART routing, and hot configuration during run.

•S900 I/O units via CI854/CI854A/CI854B, PROFIBUS DP.

•ABB Drives can be connected to the ModuleBus, via CI801. Some Drives equipment can be connected directly to PROFIBUS or PROFINET IO. Please refer to Drives-specific documentation for more information.

•Genius remote I/O (TRIO) via the CI862.

•Satt I/O on ControlNet (19” Satt rack I/O, S200 I/O and S200L I/O) via the CI865.

•PROFINET IO via CI871