AC 800F Controller for ABB Freelance DCS

The AC 800F controller has a modular structure. The CPU is designed as a backplane to which various modules – power supply units, Ethernet and fieldbus modules – can be attached in line with the application. On the fieldbus side, modules are available for:

  • PROFIBUS-DPV1
  • FOUNDATION Fieldbus HSE
  • MODBUS (master / slave, RTU or ASCII)
  • IEC 60870-5-101, IEC 60870-5-104
  • CAN for Freelance Rack I/O

The fieldbus line and the connected field devices are entirely configured and parameterized using the Freelance Engineering Tool. No further external tools are needed for configuration.

Overview

The 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.

Benefits
  • Availability: Redundancy at all levels
  • Supports different fieldbus types, even simultaneously:
    • PROFIBUS-DP, up to 12 MBd
    • FOUNDATION Fieldbus H1 (with LD 800HSE)
    • HART
    • Modbus
    • Telecontrol
    • CAN (for Freelance Rack I/O)
  • Typically around 1,000 I/Os
  • Compact, rugged design
The AC 800F hardware

The AC 800F has a modular structure. The 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 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.

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AC 800F controller

This field controller covers all major fieldbuses in process automation. Optionally, AC 800F supports redundancy. A single controller can typically support around 1,000 I/Os.

AC 800F Overview of Technical Data
 CPU 32-bit super scalar RISC processor with rapid
bit processing
 RAM 16 MB (SD-RAM)
for application with battery backup
Task execution Cyclic (configurable cycle times from 5 ms)
Event driven (predefined events)
As fast as possible (PLC mode)
Interfaces Ethernet
PROFIBUS
FOUNDATION Fieldbus
MODBUS TCP
Station bus (CAN bus)
Serial:
RS485/422/232
Modbus protocol
IEC 60870-5-101 Telecontrol protocol
Ambient temperature 0…60°C (32…140°F),
no forced cooling required
Certificates CE, NAMUR, UL, ISA-S71.04 (G3 severity level)