How it Works
Nedap N V
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TF4
User Manual
15 pgs140.36 Kb0

Nedap N V TF4 User Manual

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VC4 T/R TF4 ISO FDX/HDX
CONTENTS page
06-2005 Nedap Agri bv TF4.eng DRAFT version 0.1
1 General
The Transmitter/Receiver Twin Feeder 4 (TF4) is a re-design of the TF2 and can be
used for identifying of ISO FDX en HDX responders.
TF4 compared to TF2
The TF4 print is based on the TF2. Cable connections are the same as with a TF2. When using HDX and ISO operation a synchronisation cable must be installed.
Most important change is that FDX and HDX responder types can be identified according to the full ISO standard 11784 and 11785.
EPROM on the T/R TF4
Eproms that are suitable for a TF2 can be used on a TF4. Important is that ISO identification in the software is included. If ISO is possible, the ri menu option is available at responder select.
Caution because of pulsating transmitter (HDX)
Although everything is done to minimize, there is a possibility that the magnetic radiation of the antenna, connected to this reader, influences the behavior of a pacemaker. Users of a pacemaker are advised to avoid close contact between their pacemaker and the antenna of the TF4
In Germany and Denmark the maximum allowed level is 42 dBμA /m. at 134.2 kHz. For most other countries in Europe this maximum level is 65 dBμA/m.
2 Operation
See manual as used for a TF2
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3 Installation
The Nedap guarantee-regulations are only valid when the TF4 is installed as
indicated in this manual. The following is important :
Input voltage 22-42 VDC Max. current per output (motors) 3A DC Operating temperatures (environment) -10ºC / +45ºC Transport / storage temperatures -25ºC / +70ºC Humidity (rh) 45ºC / 93% Enclosure protection class
Cable length at power supply 27V:
IB Æ TF4 Max. 40m at wire-ø = 0.8 mm TF4 Æ motor Standard cable of the motor TF4 Æ antenna Standard cable of the antenna Synchronisation (HDX and ISO operation) Twisted pair minimum 2x0.24mm
Technical specifications Twin Feeder 4
IP65
(cover and cables installed correctly !)
Always use a NEDAP SMPS power supply Never change a prom when the power to the T/R is still switched on Install data cables at a safe distance from (high) powered cables
Wiring the TF4
Figure 1 shows an overview of the T/R TF4 cable-connection.
Cable specifications
shielded. Total max. 500m
IMPORTANT: All cables used for data communication must have shielding!
Hardware motor safeguard
When the micro processor has no control over the T/R anymore and a motor is running uncontrolled and keeps turning continuously, a hardware circuit on the T/R will stop the motor by means of a relay (25 seconds (+/- 5 sec)). This motor safeguard can only be reset by switching off the power from the T/R for a few seconds.
Software motor safeguard
This software function monitors the motor current. If a motor current is detected which is too high (Imotor > 900 mA) for a certain time, the T/R program will try to stop the motor. If the motor can not be stopped, the T/R program will shut off the power supply on all outputs.
2
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The connector at the right hand side (SYNC) contains a synchronisation signal for
In order to protect the TF4 for over-voltages / induction, the cable from the interface
• Due to guarantee-regulations, the entire T/R PCB (incl. metal plate) must be
Synchronisation for HDX
A synchronisation cable is necessary for HDX to synchronise T/Rs that can influence each other. For FDX only (jumper set to FDX only) synchronisation is not necessary.
SYNC
HDX (SYNC). SYNC has to be connected to all other HDX readers in the neighbourhood. There is no + or -. Maximum number is 16 that can be connected together for synchronization. If a cable is used with shielding, the shielding must not be connected at the bottom plate of the PCB but left as not connected.
SYNC SYNC
Jumper for FDX / HDX or FDX only
If set to FDX / HDX the red led is blinking during transmitting the synchronisation signal. When set to FDX only, the red led remains off.
LEDs
The tree leds are used for tuning the antenna. The two leds are for idenfication (green) and synchronisation (red).
Shielding, grounding
bridge to the TF4 must be a shielded cable. Connections:
interface bridge Transmitter / Receiver
N.B. All T/R electronics must be isolated. Also the T/R bottom plate has to be
isolated from the T/R ground-terminal.
connected to "-"terminal connected to ground-terminal
Warnings
changed.
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4 Set Address
The two segment display and the yellow push-button must also be used for several
The address setting concerns the following menus and procedures (see figure 3):
For communication the Transmitter / Receiver needs an address. Then the computer
knows where to send the information to. At the transmitter / receiver with help of the display and the push button the stations address is configured.
adjustments of the Transmitter / receiver. A number of different codes will appear on the display when the push-button is pushed, these codes represent the so-called menus. Each menu on its turn is divided into a number of functions. By varying the pushing time of the push-button, you will get access to the different menus and/or functions.
The first time you switch on the power of the T/R, the display will show "0-". The Transmitter / Receiver asks now for the first address. When an address is entered the display will blank out and the transmitter / receiver returns to the normal status.
• Address menu
- Set Address
- display Address
N.B. Remember that the used peripheral-address has to be unique on a channel.
Changing addresses
When the display shows SA, the "Set Address procedure" is entered by pressing the button until the display blinks. The procedure is as follows :
set decimal-digit display scrolls from 0- through 1­set unit-digit display scrolls from x0 through x9
• to indicate that the "Set Address procedure" has been entered, the display will show "0-"
• by pressing the button short, the next decimal will be displayed ("1-")
• the displayed decimal is entered by pressing the button until the display blinks
• when the decimal has been entered, the display will show "x0" (where x = entered
decimal), the unit-digit now can be entered
• by pressing the button short, the next unit will be displayed ("x1", "x2", .. , "x9 ")
• the displayed unit is entered by pressing the button until the display blinks
The following points should be noted
• the "Set Address procedure" can be quit by pressing the button until the
display blanks. The entered digits then are not stored
• the T/R will restart when the address is changed
Show addresses
When the display shows dA, the "display Address procedure" is entered by pressing the button until the display blinks. The display then shows the T/R address.
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5 Adjust antenna
⇒
Tuning:
The next step is tuning the power with AP.
The antenna adjustment has to be done with help of the display, push button, potentio meter (P external antenna).
Most eproms have following HF-menu :
HF menu Responder Select Adjust Antenna Adjust Power Adjust Squelch
Identification
The antenna adjustment-procedure consists of several steps. It is essential that these steps are executed in the sequence as in the manual described.
1) and a coil (L404) on print (or EWA transformer when using
• selection of responder type
• not used
• adjust transmitter-power by means of potentio meter P
• adjust receiver-sensitivity (0,1,2,3)
• test identification
Responder Select
rA = not used rP = not used ri = 134.2 kHz ISO responders Select rS on the display and then ri, press until display blinks to enter.
Adjust antenna procedure
The AA-menu option is not used for the TF4. Tuning of the antenna is done with a trimmer on the print (Ct) when using an internal antenna. When using an external antenna (with EWA transformer) the coil on the EWA transformer (Lt) must be used. Three LEDs next to P1 are used as indication for the tuning.
Set the antenna field on with id. Turn the trimmer (Ct) until the green LED is on.
Antenna correct adjusted
Antenna impedance to high, turn to the left
Antenna impedance to low, turn to the right
LEDs blinking : antenna error or antenna not tuned
LEDs switched off : transmitter not switched on
1
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Power adjustment
After correct processing the antenna adjustment procedure, P adjusted with help of AP.
Power adjustment is used to set the ID distance. By reducing the power the reading distance will be smaller. Power adjustment is done with a potentiometer (P1).
Changing the power level: Select with the push button the AP-menu (adjust power) and press untill the display starts to blink. A value appears on the display now. Turn P1 till the desired reading distance of the ID label. Maximum power is 99.
After changing the power level always check if the green antenna tuning LED is still on.
Adjust squelch
The adjusted squelch determines the sensitivity of the receiver in the T/R. In case e.g. animals outside the antenna are identified, the transmitted power can be reduced ("Adjust Power procedure") or the receiver-sensitivity can be reduced by means of the squelch-adjustment.
Normally squelch does not have to be adjusted (automatically set to default)
When the display shows AS, the "Adjust Squelch procedure" is entered by pressing the button until the display blinks. The display now shows the actual sensitivity of the receiver, a value from "-0" (most sensitive) "-1", "-2" or "-3" (less sensitive). By shortly pressing the button, the desired squelch can be adjusted. The setting can be entered by pressing the button until the display blinks.
Test identification
The HF-field is now continuously active, switching between HDX or FDX responders, when both types are present at the antenna.
ID-status:
- - = no responder identified xx = responder identified ( xx = last two digits of responder number)
1 (fig1) must be
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0
6 Adjust Neutrodynisation
Why using a neutrodynisation unit
When two large antennas are used in a small area, a responder identified in one antenna, is also identified in the other antenna (cross talk). Installing a neutrodynisation unit can solve this problem
max
00
0
9835733
1 2
Figure : Twin Feeder model 4 with neutrodynisation
Principle of neutrodynisation
The neutrodynisation-unit is a small version of the big antennas. The two coils in the box are connected to the antenna’s. By moving the coils the “cross talk problem” between both antennas can be solved. Tuning principle: one of the T/R is set to transmitting (tt). The other one is set to identification (id). The transmitter will give a very strong signal. The receiver will translate the received signal strength into a display value. A value around 10 means cross talk.
Wiring Neutro - EWA transformer
9835733
9836080
NEUTRO
++ --
+-
13 2 9 neutro
EWAEWA
+-
13 2 9 neutro
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Adjustment of the neutrodynisation unit Twin Feeder model 4
IMPORTANT : Always use a synchronisation cable between both T/R.
1. Switch on the power to the system
2. Position both neutrodynisation-coils close to each other, but not touching
3. Antenna 1 : Select “An” on the display, then “nt”, press until display blinks. The display now
shows “tt” (transmitting) Antenna 2 : Select “id” on the display, press until display blinks. The display now shows a
numeric value (receiving)
4. Using the TF display : Start turning the neutro wheels from each other. The value on the display of
antenna 2 will increase. Keep on turning until the highest value appears (see
graph).
5. The neutrodynisation is now finished. It is important to do a final check. Select the “id” menu. Set both antennas in “id” position. Move a responder in the middle of antenna 1 (about 40-50 cm from the floor).
When the display of T/R 2 does not show the responder number, the adjustment
is OK.
TF 4 Display neutrodynisation values explained in a graph
Display value
Optimu m
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Trouble shooting when tuning the neutrodynisation unit
• The display does not reach a peak value when tuning
Wiring twisted (when a plus and minus in the antenna system is changed there
will be no peak in tuning the neutro)
• The display starts already with a high value and does almost not increase
There is almost no cross talk, the receiver can not or almost not detect a signal
coming from the transmitter
distance between the neutrodynisation wheels
6 Display values
During operation, the program steps through different program-states which are
monitored on the display. This gives information about the state of the T/R and therefore can be used as an extra service tool.
The indication on the display is as follows :
01 wait for valid address, "SA"-menu is started automatically
04 T/R TF under test 05 start-up process finished
See manual as used for a TF2
Start process
status description of the status
00 start : processor-initialisation
02 No communication with a process computer 03 No communication with a process computer
Display values during operation
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7 Internal test menu
error description how to handle
- -
09
11
12
The Internal test menu is a powerful service tool in case of system-service. The T/R
stores registered errors which can be displayed on demand of the trouble-shooter. Also the T/R can execute a complete self test on demand, the test results also are
displayed.
Internal test menu
− display Error procedure
− Self test menu : see figure 2
Display error procedure
The detected errors are stored by the T/R itself and can be monitored on the display. Two types of messages can be displayed by the T/R :
• error-messages (E1)
• warning-messages (E2, not used yet)
The procedure shows all registered errors on the display, one after the other, proceeded by the message-type. First all error-messages will be shown, then all warning-messages.
no errors
01 02 03 04 07
08
error detected in output 1 perform self test output 1 error detected in output 2 perform self test output 2 error detected in output 3 perform self test output 3 error detected in output 4 perform self test output 4 output hardware error :
• no outputs were active, yet a output current is detected
• power supply to outputs then is switched off :
− if output current remains detected, T/R will restart
− if output current now is 0, T/R status remains unchanged
output watchdog activated :
• software detects that output runs > 15 seconds (unauthorised)
• T/R restarts
Antenna error :
• no or low HF-current detected
RAM error at start up :
• data written does not match data read
ROM error at start up :
• calculated checksum does not match checksum of EPROM
possible cause(s) :
• one or more motor-outputs defect
• uProc A/D-converter defect
solution :
• switch power supply off and on again
• if any outputs are running unauthorised,
outputs are defect, replace T/R PCB
• if T/R continuously restarts, the A/D­converter is defect. Replace T/R -PCB
possible cause :
• unknown, probably software-error
possible cause(s) :
• antenna not connected or wrong
solution :
• check antenna / tune antenna
• check HF-field
• replace T/R-PCB
solution :
• replace T/R-PCB
solution :
• replace T/R-PCB
adjusted
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8 Trouble shooting
Symptom cause solution
• T/R TF does not start up, display remains blank
• prom wrong installed • check prom
• T/R TF does not start up, display shows
"E1", "E2" or "E3"
• T/R TF does not start
up, display shows "02" or "03"
• Poor identification • antenna badly adjusted • perform identification self
• HDX synchronisation
• disturbance by:
• FDX is working ok, HDX not
• 120 kHz system in the
• All antenna leds off • HF not switch on • switch HF on in the
• Two red antenna leds
blinking
• no power • check wiring
• RAM, ROM or both
failed
• T/R TF remains in start- up process, no communication with a process computer
not ok
- computer/monitor
- television
- frenqency controlled motors
- tube lamps
- LW radio transmitters
• one or more jumpers set to FDX only
neighbourhood activ
• antenna alarm • - antenna defect
• replace T/R TF
• check T/R TF address
and other settings
• check wiring
test, check reading­distance and check if green adjustment LED is on
• if reading-distance constantly poor, readjust antenna or enlarge
transmitting-power P
• check all jumpers, wiring
• switch possible
disturbance off (when possible) and when the cause is found take action to reduce the disturbance
• set jumpers correctly
• switch 120kHz system off
to check
software
- antenna no adjusted
- short cicuit or open
antenna wire connection
1
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TWIN 4
HDX only
FDX / HDX
A
EPROM
B
D
C
P
O
VC4
J 1 0
VC4 VC3
J 8
T R
_
J 9
J8 J9
J 1 5
PCF
C2
J 1 2
X 4 X 9 X 6 X 8 X 7
E
F
J11,12 EXTERN ADJUST
J 1 1
C1
G
H
P1
J 7
J 2 J 3 J 4 J 5 J 6
C D
-
+
­Rx Tx
+
I-
Im 8
M8 M+
I-
Im 7
M7 M+
I-
I6
M6
M+
I-
I5 M5 M+
I­I4
M4
M+
J 1
+23V
I- I­I3
M3 M+ M+
I8
+23V +23V
I-
I2 M2 M+
I7
I1
M1
J1 t/m 6 BREAK ON
Sync Sync
HF2­HF2+ HF1­HF1+
R
I
J
N M L K
J1 J2 J3 J4 J5 J6
EPROM
A
Micro processor module
B
Display’s
C
Push button
D
Jumper FDX/HDX or FDX only
E
HF trimmer antenna 2 (C2)
F
HF trimmer antenna 1 (C1)
G
HF power potentio meter (P1)
H
Connector antenna 2
I
Connector antenna 1
J
+ 23 Volt
K
Input / output connectors
L
VC3 connector
M
VC4 connector
N
J10 J11 J15
Fig. 1 Overview TF4 cable connections
LED “motor hardware safeguard” disabled
O
RS232 connector
P
Synchronisation
R
J1 - J6 “Enable brake” jumpers
J1
Jumper “motor hardware safeguard” on/off
J7
J8 - J9 jumpers VC3 - VC4
J8
Jumper VC3 - VC4 communication channel
J11 - J12 Jumper HF1 and HF2
Jumper Phase code ID on/off
Signal ground
X7
Responder signal
X6
TP2
X9
TP1
X8
AGC
X4
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1
2
3
4
5
6
7
8
Fig. 2 Display menu
General overview, menu can be different for prom types and versions
1. Set Address
2. Display Address
3. Responder select ri (iso) Prom can not be used when ri is not available
4. Adjust Antenna, not used
5. Adjust Power
6. Adjust Squelch, not used
7. Not used
8. Test identification
A
A. Display errors
B
B. o1 motor output 1
o2 motor output 2 o3 motor output 3
C
o4 motor output 4
C. L1 output 1 (relais)
D
L2 output 2 (relais) L3 output 3 (relais)
E
L4 output 4 (relais)
D. i1 input 1
F
i2 input 2 i3 input 3 i4 input 4
G
E. Test identification
F. ROM/RAM test / reboot
E1 ram error E2 rom error E3 ram and rom error
G. Output installation
Press button untill blinking Press button short
To leave menu: press button untill display is empty
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