VAF instruments PEM2 User manual
Technical Manual
Instructions for installation,
operation and maintenance
662B
PEM2 TOUCH SCREEN
For T-Sense®optical torque and
TT-Sense®optical thrust and torque measuring systems
Publication nr
TIB-662B-GB-0616
Supersedes
TIB-662B-GB-0114
TABLE OF CONTENTS
1.PREFACE....................................................................................... 3
1.1General........................................................................................................3
1.2Symbols.......................................................................................................3
1.3Copyright .....................................................................................................3
2.SYSTEM DESCRIPTION................................................................ 4
2.1PEM2 TOUCH SCREEN .............................................................................4
2.2System security............................................................................................4
3.TECHNICAL SPECIFICATIONS..................................................... 5
3.1PEM2 TOUCH SCREEN .............................................................................5
4.SAFETY INSTRUCTIONS.............................................................. 5
5.UNPACKING .................................................................................. 5
6.INSTALLATION AND FIRST USE.................................................. 7
6.1To record nameplate data............................................................................7
6.2Installation diagram......................................................................................8
6.3Installation of the PEM2 touch screen..........................................................9
6.4Cable specifications...................................................................................13
7.OPERATING PRINCIPLES .......................................................... 14
7.1General......................................................................................................14
7.2Displayed parameter and engineering units...............................................14
7.3Explanation of the parameters...................................................................14
7.3.1Torque ..............................................................................................14
7.3.2Shaft speed.......................................................................................14
7.3.3Power................................................................................................14
7.3.4Thrust (option)...................................................................................14
7.4Operating instructions PEM2 touchscreen.................................................15
7.4.1Operating menus ..............................................................................15
7.5How to operate the touch screen...............................................................15
7.5.1Main menu........................................................................................16
7.5.2T-Sense®monitoring.........................................................................16
7.5.3Propulsion data.................................................................................17
7.5.4Info Screen........................................................................................17
7.5.5Settings menu...................................................................................18
7.5.6Alarm Settings...................................................................................19
7.6Method of calculations...............................................................................20
8.MAINTENANCE............................................................................ 21
9.REPAIR ........................................................................................ 21
10.TAKE OUT OF SERVICE......................................................... 21
11.REMOVAL AND STORAGE OF EQUIPMENT......................... 21
12.MALFUNCTION AND SEND FOR REPAIR ............................. 21
13.ENVIRONMENT....................................................................... 21
14.DISPOSAL................................................................................ 21
2
15.TROUBLE SHOOTING............................................................. 22
15.1PEM2 malfunction...................................................................................22
15.2No torque signal......................................................................................22
16.CERTIFICATES........................................................................ 22
16.1EMC classifications of the PEM2............................................................22
17.DRAWINGS.............................................................................. 23
18.ABBREVIATIONS..................................................................... 29
19.SPARE PARTS......................................................................... 29
20.WARRANTY CONDITIONS...................................................... 30
3
1. PREFACE
1.1 GENERAL
The PEM2 touch screen is a microprocessor based instrument, which is able to fulfil standard torque,
shaft speed and power calculations within narrow limits. Thrust and thrust/power calculations can be
performed when thrust measurements are available.
The T-Sense®torque sensor is the measuring instrument providing torque, speed and power as input
for the PEM2 touch screen. The TT-Sense®additionally provides thrust measurements as input. This
completely unique and compact total solution can be used for simple to complicated configurations.
Never use the equipment outside its specifications or beyond common engineering
practice nor use the equipment for other applications or make connections to other
equipment than explicitly described in the order acknowledgement and/or technical
manuals of VAF Instruments.
To ensure safe and correct installation and operation, read this manual completely before
installing the equipment and starting operations.
For any additional information contact:
VAF Instruments B.V. Tel. +31 78 618 3100
Vierlinghstraat 24, 3316 EL Dordrecht Fax +31 78 617 7068
The Netherlands Internet: www.vaf.nl
Or your local authorized VAF dealer.
Their addresses can be found on www.vaf.nl
1.2 SYMBOLS
The following symbols are used to call attention to specific types of information.
A warning to use caution! In some instances, personal injury or damage to the torque
sensor or control system may result if these instructions are not followed properly.
An explanation or information of interest.
1.3 COPYRIGHT
This Technical Manual is copyrighted with all rights reserved.
While every precaution has been taken in the preparation of this manual, no responsibility for errors or
omissions is assumed. Neither is any liability assumed for damages resulting from the use of the
information contained herein. Specifications can be changed without notice.
4
2. SYSTEM DESCRIPTION
2.1 PEM2 TOUCH SCREEN
The PEM2 touch screen is able to calculate several output data.
Functions, which can be performed with this PEM2 touch screen are:
Measurement and display of torque, shaft speed, power and thrust (optional).
Calculation of average shaft power, shaft speed and torque during the last 1, 4 and 24 hours.
Calculation of total energy and total revolutions including reset.
Calculation of average thrust/quotient when thrust measurement (optional) is provided.
Displaying of parameters.
The PEM2 touch screen can be installed in a control cabinet or control panel.
Remark:
Optional 4-20 mA analogue output can be integrated in the stator control box near the T-
Sense®torque sensor. Please read section 6.5 in TIB-661 for detailed information or read
TIB-664 section 6.5 in case of TT-Sense®torque/thrust sensor.
2.2 SYSTEM SECURITY
Besides checking the status of the torque measurement system the PEM2 system also checks itself
continuously for program and configuration data integrity, normal program flow and power supply
conditions. Alarm messages will be logged in a dedicated alarm screen.
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3. TECHNICAL SPECIFICATIONS
3.1 PEM2 TOUCH SCREEN
Supply voltage 24VDC ±10%
Dimensions 188 x 143 x 46 mm (w x h x d)
Cut out 174.5 x 132.5 mm (w x h)
Cut out depth 40 mm
Front panel thickness 6 mm
Connections screw terminals and RS485 connection on back panel
Temperature range 0 - 55 deg. C
Display Color TFT-Touch screen 5.6” (320x234 dots) with (optional)
adjustable LED backlight
Protection class IP 65 at front facia
Power consumption 10 W
Processor (CPU) ARM926EJ-S 32bits, 200 MHz, 32 MB SDRAM
Net weight 0.8 kg
Figure 1 – PEM2 touch screen
4. SAFETY INSTRUCTIONS
There are no special safety instructions for the equipment.
5. UNPACKING
Let the equipment acclimatize inside the closed box for at least one hour at the location where the
system will be installed.
When the equipment is taken out of the box, please leave the special protection supplied with the
equipment as long as possible in place to avoid any damage.
The special protection should be stored for the unlikely event the equipment has to be sent for repair.
Dispose of the packing material should be done according to the laws of the country where the
equipment is installed, or according to the rules that are applicable on the vessel.
Be careful when unpacking the electronic equipment. The content is fragile.
Do not press on the PEM2 touch screen.
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6. INSTALLATION AND FIRST USE
The PEM2 touch screen will be delivered with the software and correct data settings installed. First
connect the Modbus input and optional Modbus output cables to the touch screen.
The 24 VDC wires for power supply should be connected at last.
Note: There is no ON/OFF switch on the PEM2 touch screen. When the power supply is switched on
these screens will turn on.
Check if the inputs show any errors. If that is the case the connection(s) or connected equipment
should be checked and corrected.
6.1 TO RECORD NAMEPLATE DATA
This information is required when contacting the supplier for any reason.
Date of delivery: Xx xxxxxxx xxxx
Serial number: xxxxxxxxx
Hull number: xxx
Type: PEM2 touch screen
Above information can be found at the PEM2 info screen.
8
6.2 INSTALLATION DIAGRAM
The PEM2 touch screen can be connected to the stator control box as shown in Figure 2 and Figure 3.
The maximum number of touch screens, which can be connected by RS485 Modbus serial connection
is two.
Figure 2 – T-Sense®torque sensor connected to one PEM2 touch screen
Figure 3 – Example of T-Sense®torque sensor connected to two PEM2 touch screens
Remark:
When a TT-Sense®Thrust & Torque sensor is installed it can be connected in the same
way as above mentioned T-Sense®equipment.
9
6.3 INSTALLATION OF THE PEM2 TOUCH SCREEN
1. Install the PEM2 touch screen in a control cabinet or control panel in the ECR or on the bridge,
where it will be free as possible from moisture, large fluctuations of temperature and particularly of
vibration shock. Also influences such as large magnetic fields caused by transformers, relays or
electromagnets must be avoided.
2. All cable connections should be made using cables as specified in section 6.4.
3. Connect the RS485 Modbus cable from the stator control box and 24VDC power supply to the
backside of the PEM2 touch screen in accordance with Figure 4 and Figure 5.
1 24VDC power supply connector
2 COM2, 5-Pin terminal for data input via RS485 Modbus cable
6 COM1, 9-Pin female for data output/transfer to additional PEM2 touch screen
Figure 4 – Power supply and communication ports at backside of PEM2 touch screen
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Figure 5 – Power supply and RS485 Modbus cable connection to PEM2 touch screen
4. Ensure that the Modbus cable is properly shielded and grounded as close as possible to the stator
control box. The Modbus cable shield cannot be connected to the touch screen.
5. Check for correct DC supply power and integrity of external wiring connections. Turn on power and
observe several readings, like torque, shaft speed, power etc. If not, check wiring and verify whether
the inputs are in agreement with actual value.
Important notes
Never connect cable shields at both ends to ground, but at one end only, to avoid
earth loops.
To avoid interference on the signal cables, such cables must be installed as far as
possible from electric power cables used for power supply and stator.
Ensure that the ambient temperature at the PEM2 never exceeds 55°C (131°F).
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6. Only applicable if an additional (second) touch screen is connected to the T-Sense®system.
Additional touch screens are connected to the system as described in Figure 6.
Plug in a DB9 male connector into the COM1 output port at the aft side of touch screen 1 and
connect COM1 to the 5-pin terminal COM2 at touch screen 2 as described in Figure 6.
The cable connecting the two touch screens is a Modbus RS485 cable as specified in section 6.4.
Check for correct DC supply power and integrity of external wiring connections. Turn on power and
observe several readings, like torque, shaft speed, power etc. If not, check wiring and verify whether
the inputs are in agreement with actual value.
Figure 6 – Connection of a 2nd touch screen to COM1 output port of touchscreen 1
RS485
Modbus
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7. Only applicable if RS485 output signal is required from the touch screen to an external system like
an AMS or external Efficiency Monitoring System.
Additional systems are connected to the COM1 output port as described in item 6 and Figure 6.
From the COM1, DB9 connector on the backside of the touch screen you can communicate through
Modbus with the PEM2 touch screen and read out the registers. The pin out of the connector is:
1 to B (DATA +)
6 to A (DATA -)
5 to GND.
The settings to communicate with the touchscreen are:
Serial interface RS485
Communication protocol Modbus RTU
Baud rate 115200
Data bits 8
Stop bits 1
Parity None
Function code 3 (Holding Registers)
All the by VAF Instruments presented register addresses are described in a file called “T-
Sense®_Modbus_tags”. In this file the applicable register address and corresponding units of the
read-out values can be found. Please contact VAF in case you like to receive this file or if you like to
have more information about the Modbus communication.
Be aware that the Modbus read-out values are presented as two 16-bits integers, which have to be
converted to a 32-bits float. A 32-bits IEEE 754 floating point number is a mathematical formula that
allows any real number with decimal points to be represented by 32-bits with an accuracy of seven
digits. For more info please check the IEEE 754 standard for binary floating point arithmetic.
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6.4 CABLE SPECIFICATIONS
Specification for the input, output and power supply cables connected to the PEM2 touch screen.
T-Sense
Stator
Stator control box PEM2
Touch screen
display
IC-10
IC-03
IC-01 IC-02
115 / 230 VAC 24 VDC
IC-09
PEM2
Touch screen
display
IC-10
24 VDC
IC-09
Figure 7 – Specification of input and output cables at the stator control box and PEM2 touch screens
Cable specification:
IC-01 Integrated antenna cable 5m, VAF supply
IC-02 Integrated stator cable 5m, VAF supply
IC-03 Power supply (115 / 230 VAC) cable, 3 x 1,5 mm2
IC-09 Power supply (24 VDC) cable, 2 x 0,75 mm2
IC-10 Modbus connection cable, 2 x 2 x 0,75 mm2twisted pair, individually screened, braid shielded
Remark:
When a TT-Sense®Thrust & Torque sensor is installed it can be connected in the same
way as above mentioned T-Sense®equipment.
14
7. OPERATING PRINCIPLES
7.1 GENERAL
A zero setting procedure is always necessary in order to obtain a correct measurement and reading.
For more detailed information see paragraph 6.4 in TIB 661 of the T-Sense®torque sensor.
The PEM2 touch screen is easy to operate and provides the operator with a standard selection of
torque, shaft speed and power data.
A number of conditional messages will inform you about error/fault conditions if applicable.
Setups determining functionality are only possible via the access code 1234.
All setups and computations are stored in a battery backup RAM. The PEM2 system is self-checking as
for correct functioning of its memories, program run and existence of supply voltage.
7.2 DISPLAYED PARAMETER AND ENGINEERING UNITS
The following parameters are available at the PEM2 touch screen:
Torque (kNm)
Shaft speed (rpm)
Shaft power (kW)
Total energy (kWh, MWh, GWh)
Time-base (hours, minutes, seconds)
When a TT-Sense®Thrust & Torque measurement system is applied the PEM2 touch screen will
display below parameters in addition:
Propeller thrust (kN)
Thrust power quotient (kN/MW)
7.3 EXPLANATION OF THE PARAMETERS
7.3.1 Torque
The torque signal, measured in the rotor part, is sent wireless via the stator antenna to the electronics
in the control box. In this control box the signal is converted to a RS485 Modbus signal, which signal is
connected to the PEM2 touch screen. The sensor configuration is set as follows:
Zero torque adjustment will be done during commissioning of the T-Sense®rotor and control box.
Full scale adjustment of the bar graph range is programmed at VAF location.
7.3.2 Shaft speed
The shaft speed is measured via a gravity sensor in the T-Sense®rotor part. This rotor part is
connected wireless to the stator electronics in the control box. The stator electronics are connected to
the PEM2 touch screen via RS485 Modbus. Full scale adjustment of the shaft speed bar graph range is
programmed at VAF location.
7.3.3 Power
The power is calculated by multiplying the above measured shaft speed and torque. The output values
are submitted to the PEM2 touch screen via the same RS485 Modbus connection. Full scale
adjustment of the power bar graph range is programmed at VAF location.
7.3.4 Thrust (option)
In case a TT-Sense®is installed, which additionally measures the axial displacement due to propeller
thrust, the thrust values are converted to a RS485 Modbus signal in the same way as the torque and
shaft speed outputs.
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7.4 OPERATING INSTRUCTIONS PEM2 TOUCHSCREEN
7.4.1 Operating menus
The PEM2 touch screen includes with the following operating menus:
7.4.1.1 The user mode
For daily use: In this mode all relevant system menus are displayed. With the and the keys the
next screen can be displayed (scroll function).
7.4.1.2 The settings mode (settings menu) for users
Only displayed after choosing the “Settings Menu” key and entering your password (1234). The
following data can be set in this menu: the range settings of the Torque, Speed Power and Thrust bar
graphs at the PEM2 touch screen and date and time settings. The PEM2 system will be discontinued
from his operational functions, when the settings mode is selected.
7.5 HOW TO OPERATE THE TOUCH SCREEN
The PEM2 touch screen screens are designed in such a way that they are easy to operate and self
explaining. By pressing the grey keys at the touch screen the next menu is selected or specific values
can be changed.
Browsing through the menus by using the and the keys at the bottom of the touch screen
will help you to find the information you are looking for.
The Main and Setup keys at the bottom of the touch screen will give you direct access to
respectively the “Main Menu” and the “Settings Menu”.
In the “Settings Menu” you will be able to change specific values via a numeric keypad.
This keypad will be displayed after pressing the values in the grey sections at the touch screen.
The value will change when a new value is set and the Ent key is pressed. If you do not want to
change the value, pressing the Esc key will close the numeric keypad and the touch screen will
return to the previous menu. (See Figure 8 below)
Figure 8 – Numeric keypad
In the following sections several examples of PEM2 screens are shown and a description of the main
PEM2 functions is added.
16
7.5.1 Main menu
Figure 9 – Main Menu
By pushing the touch screen buttons Main and Setup at the bottom of the screen you will be able
to select the “Main Screen” or the “Settings Menu”.
The and the keys at the bottom will help you to browse quickly from screen to screen.
When the backlight is switched off by pressing the key it will automatically be activated again when you
are touching the screen.
7.5.2 T-Sense®monitoring
Figure 10 – T-Sense®Screen Figure 11 – TT-Sense®optional screen
This is the “Main Screen” submitting information about the actual “Torque”, “Propeller Speed” and
“Power at the Propeller”.
The bar graphs are specially designed to have a clear overview of the situation.
The “Avg. 1hr” power indicator in the left bottom corner makes it easy to compare the actual propulsion
power and average power during the last hour the vessel was sailing. Comparing these two values
helps the crew to efficiently detect changes in power absorption of the propulsion system.
In case a TT-Sense®Thrust & Torque sensor is applied an extra “Thrust” monitoring screen is added to
the PEM2 system. This screen will show you total Thrust and Power values and the average
Thrust/Power quotient during the last 1, 4 and 24 hours.
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7.5.3 Propulsion data
Figure 12 – Propulsion Data Screen
The upper part of this screen is showing “Average Propulsion Data” over the last 1, 4 and 24 hours.
When the propeller shaft is rotating the PEM2 is continuously recalculating these average values.
In case the propeller shaft is not rotating the average values stay as they are.
“Total Energy” consumed by the propeller and the “Total Number of Revolutions” made by the shaft are
available at the lower part of the screen.
The “Total Energy” value jumps from kW to MW to GW (min. 0,000 kW and max. 9999 GW).
The “Total Revolutions” value jumps from E3 to E6 to E9 (respectively 1000, 1x106and 1x109
revolutions)
These total values can be set to zero anytime by pushing the Reset buttons.
After resetting “Total Energy” and “Total Revolutions” the previous displayed values are
lost.
7.5.4 Info Screen
Figure 13 – Info Screen
This screen is displaying all essential data in case you to have to contact VAF Instruments regarding
your T-Sense®torque measuring system.
18
7.5.5 Settings menu
Figure 14 – Settings Menu Screen
This “Settings Menu” is accessible by entering the 4-digit password 1234 in the login screen.
This screen is your entrance to adjustment of the bar graph ranges and date and time setting.
7.5.5.1 Bar Graph Range Settings
Figure 15 – Bar Graph Range Settings Screen
In order to have a clear overview of the actual Torque, Shaft Speed and Power it is possible to change
the displayed bar graph range in the “Settings Menu”.
Push the grey sections on the screen and change the Min. or Max. value via the Numeric Keypad,
which pops up.
Inverse Torque
When the touch screen is showing a negative torque value, when sailing ahead you are
able to convert this negative value to positive by pushing the “Torque Standard/Torque
Inverse” key once.
Pushing the “Torque Inverse” key once again will return the original value again.
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7.5.5.2 Date and Time Settings
Figure 16 – Date and Time Settings Screen
Push the grey touch screen sections on the screen and change the values of date and time via the
Numeric Keypad.
Push Set to save the date and time in the PEM2 system
7.5.6 Alarm Settings
Figure 17 – Alarm Screen
In case the PEM2 touch screen detects that output data is missing the system will generate a pop-up
screen showing the alarm message “Communication Fail”. Make sure that the cable connections are
OK and read instruction manual TIB661 Chapter 15 - Trouble Shooting.
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7.6 METHOD OF CALCULATIONS
Shaft power is calculated from the measured torque and the revolutions of the shaft.
Shaft power
∙
9.945
P = Shaft power [kW]
M = Torque [kNm]
n = rotations per minute [rpm]
Total energy is calculated from the integrating shaft power over time
Total energy
∆∙∆
E = Total energy [kWh]
The thrust quotient indicates the amount of thrust generated per MW propulsion power. The thrust
quotient is an indicator of propeller efficiency. Be aware that propeller thrust and ship speed influence
each other.
Thrust quotient
1000
T = Thrust [kN]
P = Shaft power [kW]
∙
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