Electrical Controls; Motor Control Board (Mcb) Auto Configure; Motor Current Limiting; Motor Soft Stops - Task Force Tips Tornado Instructions For Installation, Safe Operation And Maintenance

3.5 ELECTRICAL CONTROLS

The electric Tornado RC monitor is controlled by a very powerful, state-of-the-art electronics system. The key components of the system
are the motor control boards and a communication board. Each motor control board has its own microprocessor and a sophisticated
motor control chip. The communication board also has a microprocessor, which handles the interface to the operator stations. All the
components on these boards are solid state; there are no relays or electro-mechanical devices to wear out over time. The hardware and
software have been designed with several key features:

3.5.1 MOTOR CONTROL BOARD (MCB) AUTO CONFIGURE

Each monitor has three MCBs, one for each motor. The MCB controls motor movement and direction for horizontal rotation, elevation,
and nozzle pattern. In the unlikely event of a MCB failure, the failed board can be removed and one of the other two remaining MCBs can
be moved into that position. This MCB will then auto configure itself to take over the control of that axis, so that the monitor can continue
to be used, with two of the three motors. This is also a helpful benefit when troubleshooting and requires fewer spare parts to be stocked.

3.5.2 MOTOR CURRENT LIMITING

The microprocessor on the MCB continuously monitors the motor current. As the motor reaches an end stop or if there is an obstruction,
the motor current rises very quickly and the motor control chip automatically shuts down the motor in a few milliseconds. This eliminates
the need for any type of external limit switches and the associated wiring. The microprocessor also locks the operator from moving in the
stopped direction again, until the operator first moves in the opposite direction.

3.5.3 MOTOR SOFT STOPS

The horizontal and vertical motors are equipped with feedback encoders, which allow the microprocessor to know the motor position at
all times. The first time a motor reaches an end stop or strikes an obstruction, the microprocessor sets a new soft stop position just
before the end stop. From that point, on when the axis approaches the stop, the MCB automatically slows down the motor until the end
stop is reached. This significantly reduces the wear on the motor, gearbox, and geardrives.

3.5.4 MOTOR SLOW/FAST SPEED

When an operator presses one of the buttons, the associated motor starts in low speed mode for accurate control of the water stream.
After approximately 1/2 second the motor automatically ramps up to high speed, for quickly moving into position. When quickly
changing directions, monitor remains at speed of prior move. If low speed is selected, monitor does not ramp to high speed but remains
in low speed.

3.5.5 COMMUNICATION PROTOCOL

The communication from the monitor to the operator stations is performed over two wires using RS-485 serial protocol. Multiple
operator stations can be added with only two wires for power and two wires for the RS-485 protocol between each station.

3.5.6 OSCILLATE AND STOW FEATURES

The OSCILLATE feature allows the user to program up to 65 points of continuous movement of the horizontal and vertical axes. The
OSCILLATE pattern can be programmed from any operator station that has the OSC button.
The STOW feature allows the user to move the monitor, with one touch of a button, to a safe position before moving the fire truck. The
monitor will always move to two end stops to verify the correct position. During the programming procedure, the user has the ability to
select which axis moves first. This is helpful to avoid lights, hoses, obstructions, etc. The user can program up to 10 points of movement
to reach the final stow position. The STOW pattern can be programmed from any operator station that has the STOW button. A relay
contact is available for connection to the truck alarm system.

4.0 INSTALLATION

4.1 STRUCTURAL REQUIREMENTS FOR MONITOR MOUNTING

The structure that the Tornado Monitor is mounted to must withstand the
internal pressure of the monitor, as well as shear and bending forces due to
nozzle reaction. Nozzle reaction can be as high as 400 lbs (180 kg) (500
gpm at 200 psi).
For flanged connections, the use of flat flanges without raised faces is
recommended. Use a full-face gasket as defined in SME 16.21 or ISO
7483. Tighten flange bolts in an alternating sequence as shown in figure
4.1. Tighten to 76-80 ft-lb (100-110 Newton-Meters).
WARNING
Injury can result from an inadequately supported monitor. The monitor mount must be capable of
supporting the nozzle reaction force which can be as high as 400 lbs (180 kg). Flanges and pipe
made from plastic are inadequate for monitor mounting and must not be used. This monitor is not
recommended for portable use.
Tighten sequentially
each bolt three times.
7
1
3
2
Fig 4.1 Flange Bolt Tightening Sequence
4