Section 6 Integrated computer control - ICC notation
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Ships, July 2022 - Part 6 Control, Electrical, Refrigeration and Fire - Chapter 1 Control Engineering Systems - Section 6 Integrated computer control - ICC notation

Section 6 Integrated computer control - ICC notation

Parent topic: Chapter 1 Control Engineering Systems

6.1 General

6.1.1 Integrated Computer Control class notation ICC may be assigned where an integrated computer system in compliance with Pt 6, Ch 1, 6.1 General provides fault tolerant control and monitoring functions for one or more of the following services:

  1. Propulsion;

  2. Electrical generation and distribution (power management systems);

  3. Cargo and ballast.

6.1.2 A Failure Mode and Effects Analysis (FMEA) is to be carried out in accordance with IEC 60812: Analysis techniques for system reliability – Procedure for failure mode and effects analysis (FMEA) and the report and worksheets submitted for consideration. See also Pt 6, Ch 1, 2.14 Programmable electronic systems – Additional requirements for integrated systems 2.14.5. The FMEA is to demonstrate that control and monitoring functions required by Pt 6, Ch 1, 6.2 General requirements will remain available at each operator station in the event of a single fault of the integrated computer control system, including input error, without adverse effect on the service(s).

6.1.3 Special consideration will be given to integrated computer control systems for other applications, except where these are addressed by other control engineering class notations. In particular, see Pt 7, Ch 9 Navigational Arrangements and Integrated Bridge Systems for requirements of the optional class notation IBS – Integrated Bridge Navigation Systems.

6.2 General requirements

6.2.1 The integrated computer control system is to comply with the programmable electronic system requirements of Pt 6, Ch 1, 2.10 Programmable electronic systems - General requirements to Pt 6, Ch 1, 2.13 Programmable electronic systems - Additional requirements for essential services and safety critical systems and the control and monitoring requirements of the Rules applicable to particular equipment, machinery or systems.

6.2.2 Alarm displays are to be provided, in compliance with the requirements of Pt 6, Ch 1, 2.3 Alarm systems, general requirements, which ensure ready identification of faults in the equipment under control.

6.2.3 Alarm and indication functions required by Pt 6, Ch 1, 2.4 Safety systems, general requirements are to be provided by the integrated computer control system in response to the activation of any safety function for associated machinery. Systems providing the safety functions are in general to be independent of the integrated computer system. See also Pt 6, Ch 1, 2.13 Programmable electronic systems - Additional requirements for essential services and safety critical systems 2.13.7.

6.2.4 Controls are to be provided, in compliance with Pt 6, Ch 1, 2.5 Control systems, general requirements, to ensure the safe and effective operation of equipment and response to faults, e.g. stopping, starting, adjustment of parameters, etc. Indication of operational status and other such parameters necessary to satisfy this requirement, is to be provided for all equipment under control by the integrated computer control system.

6.3 Operator stations

6.3.1 Each operator station allowing control of equipment is to be provided with a minimum of two multi-function display and control units. The number of units is to be sufficient to allow simultaneous access to control and monitoring functions required by Pt 6, Ch 1, 6.2 General requirements 6.2.2 to Pt 6, Ch 1, 6.2 General requirements 6.2.4. See also Pt 6, Ch 1, 2.10 Programmable electronic systems - General requirements 2.10.10 to Pt 6, Ch 1, 2.10 Programmable electronic systems - General requirements 2.10.16.

6.3.2 Each multi-function display and control unit is to include a monitor, keyboard and tracker ball. Alternative arrangements will be considered where these enable each unit to be configured by the user to provide required control or monitoring functions.

6.3.3 Where the integrated computer control system is arranged such that control and monitoring functions may be accessed at more than one operator station, the selected mode of operation of each station (e.g. in control, standby, etc.) is to be clearly indicated. See also Pt 6, Ch 1, 2.2 Control stations for machinery.

6.3.4 Means of communication are to be provided between operator stations and any other stations from which the equipment may be controlled. The arrangements are to be permanently installed and are to remain operational in the event of failure of the main electrical power supply to the integrated control system.

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