2.1.1 Control
systems are to be such that all equipment under control will operate
correctly within intended working ranges and will not be subject to
detrimental overload or other unintended modes of operation.
2.1.2 Control
systems are to be designed to fail-safe, evaluated on the safety requirements
of the complete installation.
2.1.3 Control
stations are to be located and arranged such that equipment may be
effectively controlled by the operator. All information required by
the operator for effective control is to be provided at the control
station, including indication of status of equipment under control
and the presence of unrectified faults.
2.1.4 Where
remote or automatic controls are employed, alternative means of operation
are to be provided. This may be achieved by local manual control arrangements,
subject to all necessary information being available locally.
2.1.5 Failure
of any remote or automatic control system is to be indicated at the
control station. Further remote or automatic operation is to be prevented
until the fault has been cleared and the system manually reset.
2.1.6 Where
it is intended that equipment be controlled from more than one location,
appropriate interlocks are to be provided to ensure that control is
possible from only one control station at any time.
2.1.7 Where
a sequence of operations is to be followed automatically, means are
to be provided to ensure that all necessary conditions are fulfilled
before commencing each stage of the sequence.