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

3.5 ELECTRICAL CONTROLS

The electric Monsoon RC monitor is controlled by a powerful, state-of-the-art electronics system. The key components of the system
are the motor control boards (Y5100) and a communication board (Y5110). 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 and are outlined in the following sections.

3.5.1 MOTOR CONTROL BOARD (MCB) AUTO CONFIGURE

Each monitor has three MCBs, one for each motor, which 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 it hits 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 gear drives.

3.5.4 MOTOR SLOW/FAST SPEED

When an operator presses one of the buttons, the associated motor starts in slow speed mode for accurate control of the water stream.
After approximately 2 seconds the motor automatically ramps up to a fast speed, for quickly moving into position. When quickly
changing directions, monitor retains speed from prior move. If low speed is selected, monitor does not ramp to high speed but remains in
slow 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 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. See Operator Station Label or Fig 6.2.4.1
for instructions.
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 of user choice. 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. See section 6.2.3 and 6.2.4 for programming instructions.

4.0 INSTALLATION

4.1 STRUCTURAL REQUIREMENTS FOR MONITOR MOUNTING

The structure that the Monsoon 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 1,500 lbs (700 kg)
(2000 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 4A.
Tighten to 76-80 ft-lb (100-110 Newton-Meters).
WARNING
©Copyright Task Force Tips, Inc. 2004-2005
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 1500 lbs (700 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.
1
3 4
2
Tighten sequentially each bolt three times.
Fig 4.1A Flange Bolt Tightening Sequence
10
1
5
8
3 4
6
7
2
LIY-200 September 14, 2005 Rev02