GKD 2-TH Series User manual

USER MANUAL
M2000020 V1.1 - 06/2021

M2000022 V1.1 - 05/2021
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Contents
SERIES 2-TH INTRODUCTION
SYSTEM HARDWARE
KEY SWITCH POSITIONS
SETTING A HEIGHT LIMIT BY CAPTURING THE MACHINE POSITION
SETTING A HEIGHT LIMIT BY MANUALLY ENTERING THE HEIGHT
OPERATIONAL MODE
OVERRIDE
AT A LIMIT
TRAVEL ENABLE
WARNING MESSAGES
DISPLAY SETTINGS
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SYSTEM HARDWARE
The Series 2-TH system consists of the PLC module, PDM display and
Input & Output devices. Both the PLC and the PDM display have running
Real Time software and the application code loaded to the device.
• PLC module, Model: CR0403 IFM electronic
• PDM display, Model: CR0451 IFM electronic
Operation
When the system powers up, and displays the GKD logo, press the OK
button to enter the operational mode.
SERIES 2-TH INTRODUCTION
The Series 2-TH is a stand-alone PLC based Height Limiter intended for
use on hydraulic Telehandlers and similar machines where there is 1 boom
with an Extension and height limits are required.
Sensor Telehandler system monitors the front end equipment (Telescopic
Boom) to allow the safe use of the machine while under obstacles. It
processes the sensor inputs, controls output valves limiting the front
end equipment of the machine. The height limits are set by the machine
operator and are displayed on the in-cab display. The system will then
warn when the machine is close to a limit and then prevent the limit from
being exceeded.
This product is a safety product.
WARNING - THE HEIGHT RESTRICTION FUNCTION IS DESIGNED TO BE
USED AT SLOW LIFT SPEEDS ONLY. USE AT SPEED MAY RESULT IN AN
OVERSHOOT INTO A POTENTIALLY DANGEROUS POSITION.
WARNING - THE SLEW RESTRICTION FUNCTIONS ARE DESIGNED TO
BE USED AT SLOW SLEW SPEEDS ONLY. USE AT SPEED MAY RESULT
IN AN OVERSHOOT INTO A POTENTIALLY DANGEROUS POSITION.
NOTE: THE HEIGHT RESTRICTION IS MEASURED FROM THE HIGHEST
POINT OF THE MACHINE WHICH IN MANY CASES WILL BE HIGHER
THAN THE OPERATOR CAB.
IF THE ADDITIONAL SENSOR IF FITTED TO THE FORKS OF THE
TELEHANDLER, THEN THIS ADDITIONAL HEIGHT WILL ALSO BE
TAKEN INTO ACCOUNT
F1 F3
Arrow Keys
F2 OK
F4

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KEY SWITCH POSITIONS
Operational
Turn the key switch to the straight position.
This puts the system into the Operational Mode. While in this mode,
Height Limits are active.
Travel Mode
Turn the key switch to the left position to enable Travel Mode.
While in Travel Mode, Boom controls are locked, but travel is allowed
(depending on optional Travel Inhibit valve).
Service Menu or Calibration Mode
Turn the key switch to the right position to access Override, Set Limits
and Service Area.
From this menu, Height limits can be set and/or adjusted. Also, the
system can be overridden if required.
The Service Area is passcode protected.
SETTING A HEIGHT LIMIT BY CAPTURING THE MACHINE
POSITION
Turn the Key Switch to the Set Limits position and select the Set Limits
option.
Select Height Limit.
Raise and/or extend the boom to the required limit position and press
OK button to set.

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SETTING A HEIGHT LIMIT BY MANUALLY ENTERING THE
HEIGHT
Turn the Key Switch to the Set Limits position and select the Set Height
Limit option.
Press F4 key button to delete the existing limit and Press Manual to
enter the height limit, in meters. The Set limit value screen will appear as
below. Use the arrow keys to enter the required height.
Confirm the required value in meters by pressing OK button.
Press Back button.
OPERATIONAL MODE
When Series 2-TH r is activated the following screen will appear.
The left hand side of the screen shows the Tele Extension length (in
green) as well as the maximum extension length allowed (in blue).
The right hand side of the screen shows the current highest point of
the equipment (in yellow) and the current set height limit (in blue just
under).
When on the limit position, the external audible sounder is switched on
to warn the operator and the relevant valve cut o to disable any further
upwards movement.

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OVERRIDE
The slew and height limits in this mode are overridden, so the operator
can rotate and lift the arm freely without any restriction. The external
beacon will turn o to when overridden.
AT A LIMIT
When on the limit position, the external audible sounder is switched on
to warn the operator and the relevant valve cut is switched o to disable
any further movement in that direction. The only movement allowed will
be away from the limit.
If the arm exceeds the pre-set distance from the limit towards to the
restricted zone, the system activates
‘Dead man’ feature, i.e. the main relay supplying the hydraulic valve turns
o. The warning message will appear on the screen. Rectify the error by
switching to override mode.
TRAVEL ENABLE
When the Manual Set Limits setting is selected, the machine travel is
enabled by turning the key switch to the travel enable mode. The slew
valves are cut o to disable rotating the arm and both travel valves are
enabled. The travelling screen will appear on the display.

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WARNING MESSAGES
During the system configuration and the normal operation process the
Sensor slew system calculates and evaluates all the conditions. In any
abnormal condition a relevant warning message will appear on the
screen.
Configure First
The system is not configured when delivered. It needs to be installed and
configured on the machine.
Auto Configure First
When Set zero selected before the system has been configured. Start the
system configuration with Auto configuration before Set zero.
Power O
If the arm exceeds the pre-set distance from the limit towards to the
restricted zone, the system activates ‘Dead man’ feature, i.e. the main
relay supplying the hydraulic valve turns o. The warning message will
appear on the screen. Rectify the error by switching to override mode.

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The correspondent screen will appear.
Brightness
Select the Brightness option by using the up and down arrows and the
OK push button.
The correspondent screen will appear.
Set the display brightness by pressing the correspondent push button for
pre-set values or by using the up and down arrows. Confirm the setting
by pressing the OK push button.
DISPLAY SETTINGS
From the Start up initial screen press the Display Settings push button.
The Display Setup screen will appear.
Software Versions
Select the Software Versions option by using the up and down arrows
and the OK push button.

GKD Technologies reserve the
right to change these instructions in
line with the policy of continuous improvement.
17 Cobham Road, Ferndown Industrial Estate, Wimborne, Dorset, UK. BH21 7PE
[phone] [e-mail] www.gkdtechnologies.com