ABB CP800 Fixed function blocks for operational characteristics

Description

Personnel installing, operating, or maintaining the controller

should read this instruction before performing any installa

tion, operation, or maintenance procedures. Installation

requires an engineer or technician with experience handling

electronic circuitry. Formal training in Symphony system

configuration

Hnet Communications path between Harmony controller and block I/O.

HSI Human system interface.

Executive block Fixed function block that determines overall controller operating characteristics.

Function block The occurrence of a FC at a block address of a controller.

FC Function code. An algorithm which manipulates specific functions. These func

tions are linked together to form the control strategy.

I/O Input/output.

I/O controller Houses the block I/O circuitry; part of Harmony block I/O.

I/O expander

bus

Parallel communication bus between the Harmony rack controller and Harmony

rack I/O controllers.

MFT Machine fault timer. Reset by the processor during normal operation. If not reset

regularly, the MFT times out and the controller stops.

MMU Module mounting unit. A card cage that provides electrical and communication

support for Harmony rack controllers.

Module bus Low speed peer-to-peer communications link. Used to transfer information

between intelligent controllers and INFI 90 controllers within a Harmony control

unit.

PBA Processor bus adapter (PBA).

TU Termination unit. Provides input/output connection between plant equipment and

the Harmony rack controllers.

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