ABB DCS ABB PLC AC 800F – The Field Controller

ABB DCS ABB PLC AC 800F – The Field Controller

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AC 800F – The Field Controller

The ABB DCS AC 800F controller distributes process and diagnostic data from four fieldbus gateways. If required, it can also work with various fieldbus types – and this

is, of course, in addition to the usual tasks of a “conventional” controller. Thanks to its compact and sturdy design, the AC 800F is suitable both for installation in the control room and for use in junction boxes directly in the field.

Economical and reliable into the future
AC 800F offers new possibilities, combining “easy engineering” with an open and modern system architecture:

  • Availability: Redundancy at all levels
  • Freedom of Choice: PROFIBUS, FOUNDATION Fieldbus or HART; or combinations of those protocols
  • Efficient Engineering: Support for FDT/DTM
  • Only one tool for engineering, commissioning and diagnositics
  • Asset Optimization and batch processing
  • System engineering covers fieldbus and device configuration
  • On-board web server for remote diagnostics

Technical DataABB DCS
CPU32-bit super-scalar RISC processor
with high-speed bit processing
RAM4 Mbyte (SRAM) or 16 Mbyte (DRAM) with internal
or external battery backup 4 Mbyte Flash EPROM
Environmental conditionsAmbient temperature: 0…60 °C Degree of protection: IP 20
Dimensions239 x 202 x 164 mm (W x H x D) Mounting on DIN rail
Power supply120 / 230 V AC 24 V DC, redundant
Power consumption: 30 VA max.
ApprovalsCSA-UL, CE, NAMUR

AC800F Ordering information

AC800F Part No.ParametersIN STOCK
PM802FInclude rack , CPU,8MCheck Stock
PM803FInclude rack , CPU,16MCheck Stock
SA811FField control equipment 220VAC-24VDCCheck Stock
SD812FField control equipment 24VDC-24VDCCheck Stock
Ethernet module Check Stock
EI811F10Base2 ModuleCheck Stock
EI812FAUI ModuleCheck Stock
EI813F10Base T ModuleCheck Stock
Other communication module Check Stock
FI810FCAN ModuleCheck Stock
FI820FModbus ModuleCheck Stock
FI830FProfibus-DP V1 ModuleCheck Stock
FI840FFF ModuleCheck Stock
Accessory Check Stock
TK807FSA801F/SA811F service cableCheck Stock
TK808FSA801F/SA811F service cable,Eur standard plugCheck Stock
TK809FSA801F/SA811F service cable,USA standard plugCheck Stock
TK802FSD802F service cableCheck Stock
TK821FSerial interface communication cable,0.5mCheck Stock
TK831FCAN communication cable,0.5mCheck Stock
TK811FCAN communication cable,3mCheck Stock
TK817FCAN communication cable,100mCheck Stock
TK890FDiagnosis cable 5mCheck Stock
TK891FDiagnosis cable 10mCheck Stock
TB870FCommunication wiring boardCheck Stock
AM811FBattery moduleCheck Stock
AM895F(4)Front panel(4pcs in one bag)Check Stock
SB808FRAM back up battery (for EI8**Fmodule)Check Stock
SY809FBattery stentsCheck Stock

The ABB DCS AC 800F hardware
The ABB AC 800F has a modular structure. The AC 800F CPU is designed as a backplane to which various modules – power supply units, Ethernet or fieldbus modules – can be attached in line with the application. On the fieldbus side, modules for PROFIBUS-DPV1, FOUNDATION Fieldbus HSE, MODBUS (master/slave, RTU or ASCII), IEC 608 0-5-101 and CAN for Freelance Rack I/O are available. The fieldbus line and the connected PROFIBUS slaves are entirely configured and parameterized using the Control Builder F engineering tool. No further external tools are needed for configuration. PROFIBUS slaves can be integrated into the system using a GSD) file or FDT/DTM). In the case of FOUNDATION Fieldbus, configuration takes place using CFF or DD files. This allows fieldbus parameterization even without connected field devices.
Also Freelance Rack I/O can be connected to the ABB AC 800F, in which case a CAN module is used. This allows you to operate five I/O racks, with a total of around 1000 I/Os, for each AC 800F. The I/O racks are equipped with a link module and up to nine I/O modules and can be mounted separately at a distance of up to 400 m from the AC 800F.

AC 800F Fieldbus modules
The ABB AC 800F uses the fieldbus modules to collect and process real-time and diagnostic data. Up to four fieldbus modules can be mounted into one AC 800F.

The fieldbus modules have the following tasks and
• Electrical isolation between the process and system
• Status LEDs for the module status
• Independent fault detection and fault signaling
• Connection of the fieldbus lines

Details of the fielbus modulesABB CHABB PLC
CAN module1Connection of up to 5 Freelance I/O racks
Serial moduleRS /RS4 /RS485 configurable for MODBUS, IEC 608 0-5-101 telecontrol protocol
PROFIBUS module1Full-value PROFIBUS DPV1 Master
FF-HSE module1For the connection of up to 10 LD 800HSE Linking Devices with 10/100 MBaud autosense twisted pair connection

Ethernet modules
Process stations and the operator and engineering level in the Freelance system communicate with each other via Ethernet.

Ethernet modules for the system bus
Ethernet module1Twisted pair connection 10 base T for connection to hubs or switches
Ethernet module1BNC connection 10 base for thin coaxial cable (Cheapernet), 10 MBit/s
Ethernet module1AUI connection 10 base 5 and 10 base FL via coupler

ABB AC 800F Engineering

ABB AC 800F control applications can be created in any of the five IEC 61131-3 dialects by using Control Builder F.
see Engineering Tool Control Builder F

ABB AC 800F functional range

The ABB AC 800F scope of functions provided by the Freelance system corresponds to the basic supply defined in IEC 61131-3, in addition to numerous other high performance, industry-proven functions and function blocks. They are accommodated in a function block library and can be supplemented by user-specific function blocks. While designing the station and during configuration, the processing capacity and speed of the process station can be easily adapted to the demands of the automation task. Program execution in the process station is based on a task-oriented, real-time multitasking operating system, leading to a flexible strategy for processing programs.
Different modes are available for task execution:

  • Cyclical processing with cycle times from 5 ms upward
  • Fastest-possible processing (PLC mode)

Along with the user tasks, system tasks – in which functions can also be processed – are automatically made available. These tasks are executed once in case of the following events:

  • RUN
  • STOP
  • WARM START (voltage restored)

Up to eight cyclic user tasks and one PLC mode task can be configured in a process station.

Functions and Function Blocks
Analog value processingAC800F FUNCITIONSInput and output conversionLinearization -Delay and dead-time filterAverage/extreme value determination in timeSetpoint adjustmentCounter with analog inputTime scheduler
Binary value processingBinary output, monostableInput and output delayPulse/time counter, pushbutton
Closed-loop controlContinuous controllersStep controllersOn/off controller, three-position controllerRatio controllerBasic functionsAuto-tuning
Open-loop controlIndividual drive functionsSequence control, dosing circuits
Logic functionsLogic processingAverage/extreme value determinationComparator, binary switchMultiplexer -Converter (data type & code)Flip-flop, edge detectionString blocksradio controlled adjustment of daylight-saving time
MonitoringAnalog and binary monitoringEvent monitoringAudible alarm controlConnection monitoringSequence-of-Events (SOE)
Acquisition Arithmetic functionsDisturbance course acquisition, trend acquisitionBasic arithmetic functions, numerical functionsLogarithmic functionsTrigonometric functionsAnalog value and time limitation
Modbus functions PROFIBUSMaster and slave functionsDPV1 master functions for AC 800F
FOUNDATION Fieldbus (FF) Send/ReceiveFF High Speed Ethernet (HSE/H1) for AC 800FSend and receive blocks for inter-system communication
Phase logic processingInterface module for batch applications

Intelligent linking devices
As the AC 800F possesses the high-speed connection of both PROFIBUS (PROFIBUS DP) and FOUNDATION Fieldbus (FF-HSE), the slower buses of the two fieldbus technologies (PROFIBUS PA and FF-H1) can be connected using intelligent linking devices.
These devices allow to connect several slow buses to one fast bus, with the advantage that a lot more field devices can be connected to an ABB DCS AC 800F station than when the slow fieldbuses are connected directly.

Maximum Security
In order to achieve safe operation and high plant availability, the ABB DCS AC 800F supports redundancy on all levels. This increases security and avoids production downtime! Redundancy is available for the:

  • System bus (Standard Ethernet Solution)
  • Controller
  • Input/output modules
  • Fieldbus master
  • Fieldbus lines
  • Linking devices
  • HSI communication

High Flexibility
Digital communication has changed automation technology to the better. Fieldbus technology is nowadays proven and well accepted by the users to perform the tasks of transmitting process- as well as diagnostic data. This is an enabling technology for new applications such as asset optimization

ABB AC 800F collects and processes signals and diagnostic data from up to four fieldbus lines. If required, it can also simultaneously work with various fieldbus types – and this is, of course, in addition to the usual tasks of a “conventional” process station. Furthermore, the ABB DCS AC 800F has a compact and modular design which makes it a universal electronic component for virtually all types of applications. It is suitable for both: simple installation in the switch room and for direct use in the field. Take the advantage provided by this technology:

The ABB DCS AC 800F allows you to use the fieldbus type(s) which best meets your requirements:

  • Foundation Fieldbus
  • MODBUS protocol
  • Interbus
  • IEC 870-5 telecontrol protocol
  • CAN-Bus for connecting Input/Output modules
  • HART with PROFIBUS remote I/O

Efficient Engineering
For consistent configuration, commissioning and diagnosis – from graphics to the field device – you only need one engineering tool. This tool supports fieldbus-specific
configuration in the familiar way by means of its consistent, system-wide database. This includes:

  • Configuration and parmeter setting of field devices and remote I/Os via GSD/GSE files or FDT/DTM
  • Integrated diagnostics for controller and device checks with automatic alarms
  • Automatic generation of displays for operation
  • Bus topology and parameters such as transmission rates and addre

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