Nedap N V SF4 User Manual

VC4 T/R SF4 ISO FDX/HDX

CONTENTS page

1 General 1
2 Operation 1
3 Installation 2
4 Set Address 4
5 Adjust antenna 5
6 Adjust Neutrodynisation 7
6 Display values 9
7 Internal test menu 10
8 Trouble shooting 11
Fig. 1 Overview SF4 cable connections (Feed model) 12
Fig. 2 Overview SF4 cable connections (Walkthrough model) 13
Fig. 3 Overview SF4 cable connections with walk-by ID 14
Fig. 4 Overview SF4 + Booster cable connections with walk-by ID 15
Fig. 5 Display menu 16

10-2005 Nedap Agri bv
SF4.eng version 0.2

1 General

The Transmitter/Receiver Single Feeder 4 (SF4) is a re-design of the SF2 and can

be used for identifying of ISO FDX en HDX responders.

SF4 compared to SF2

The SF4 print is based on the SF2. Cable connections are the same as with a SF2.
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 SF4

Eproms that are suitable for a SF2 can be used on a SF4. 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 SF4

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 SF2

Single Feeder 4 - 1 - 10/2005 Version 0.2

3 Installation

The Nedap guarantee-regulations are only valid when the SF4 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 SF4 Max. 40m at wire-ø = 0.8 mm
SF4 Æ motor Standard cable of the motor
SF4 Æ antenna Standard cable of the antenna
Synchronisation (HDX and ISO operation) Twisted pair minimum 2x0.24mm

Technical specifications Single 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 SF4

Figure 1 shows an overview of the T/R SF4 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

Single Feeder 4 - 2 - 10/2005 Version 0.2

The connector at the right hand side (SYNC) contains a synchronisation signal for

In order to protect the SF4 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 Single Feeders 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 SF4 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.

Single Feeder 4 - 3 - 10/2005 Version 0.2

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.

Single Feeder 4 - 4 - 10/2005 Version 0.2

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 SF4. Tuning of the antenna is done with a
trimmer on the print (Ct) when using an internal antenna. When using an external
antenna the coil on the 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

Single Feeder 4 - 5 - 10/2005 Version 0.2

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

Single Feeder 4 - 6 - 10/2005 Version 0.2

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 : Single 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

Single Feeder 4 - 7 - 10/2005 Version 0.2

Adjustment of the neutrodynisation unit
Single 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 SF 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.

SF 4 Display neutrodynisation values explained in a graph

Display value

Optimu m

Single Feeder 4 - 8 - 10/2005 Version 0.2

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 SF under test
05 start-up process finished

See manual as used for a SF2

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

Single Feeder 4 - 9 - 10/2005 Version 0.2

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

Single Feeder 4 - 10 - 10/2005 Version 0.2

8 Trouble shooting

Symptom cause solution

• T/R SF does not start
up, display remains
blank

• prom wrong installed • check prom

• T/R SF does not start
up, display shows

"E1", "E2" or "E3"

• T/R SF 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 SF 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 SF

• check T/R SF 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

Single Feeder 4 - 11 - 10/2005 Version 0.2

9863311

EPROM

FDX only

FDX / HDX

9

P1

8

4

D

DS

M+

C

M4

+

-

DR

3

M+ M+

M3

I4

I-

M2

I3

I-

1 2

M+

M1

I2

I1

I-

I-

HF+

ANT

HF-

Ct

7

A

B

B

B

D B

6

1

C
D

-

+

I­M+
Mx
Ix

I-

5

M+
Mx
Ix

I­M+
Mx
Ix

I­M+
Mx
Ix

2

3

4

Cable nr. # of wires L.max. (m)*

A 4 40
B 4 3**
D 2 2 * at wire-D = 0.8mm. (other D’s see text)

** Longer cable no problem, but not CE approved

1. IB VC4 5. Feed motor 4 (optional)

2. Feed motor 1 6. Antenna

3. Feed motor 2 7. Shielding

4. Feed motor 3 8. Synchronisation

9. Jumper FDX / HDX or FDX only
Feed motor 4 : only with T/R SF2-4M
Antenna : can also be EWA transformer (use HF+ and HF- connection)

Fig. 1 Overview SF4 cable connections (Feed model)

Single Feeder 4 - 12 - 10/2005 Version 0.2

FDX only

9863311

+

D

-

C

DR

DS

10

A B C E C C

M+

M3

I3

I-

M+

M2

I2

I-

2 3

9

M+

M1

FDX / HDX

HF+

ANT

I1

I-

HF-

P1

8

4

1

C
D

­+

9835733

5

Lt

trim

13 9 2 neu

A

0

B

0

1 2

F

+ + - -

6

Lt

7

9836080

Cable nr. # of wires L.max. (m)*

A 4 40 gate open switch closed
C 2 3** gate closed switch open
E coax RG58 10
F coax RG58 10 * at wire-D = 0.8mm. (other D’s see text)

** Longer cable no problem, but not CE approved

Gate switch

1. IB VC4 6. Neutrodynisation unit

2. Green lamp 7. To second EWA-transformer

3. Red lamp 8. Synchronisation

4. Gate switch 9. Jumper FDX / HDX or FDX only

5. EWA-transformer 10. Cable shielding

Fig. 2 Overview SF4 cable connections (Walkthrough model)

Single Feeder 4 - 13 - 10/2005 Version 0.2

3

4

Lt 1 2

T/R SF4

HF-

HF+

ANT

Tuner
HDPE
antenna

5

50x50 art.no 9887881
40x120 art.no 9886095
60x100 art.no 9886257

1. Antenna type selection (default on 3)

2. Always use cable ferrules to connect coax

3. Install with swivels downwards

4. Standard antenna cable, do not change length of the coax antenna cable

5. Coax cable RG 58 max. length 100m

Tuning the antenna

Set the antenna field on with id.

Turn the trimmer (Lt) until the green LED is on.

If the green led does not show up, set the antenna type selector on 2 or 4 and try again.

Antenna tuned correctly

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

Fig. 3 Overview SF4 cable connections with walk-by ID

Single Feeder 4 - 14 - 10/2005 Version 0.2

tuner HDPE antenna

T/R SF 4

HF-

Power

HF+

ANT

to a nte nna inp ut

+ -

+ -

B A

+ -

C

to a nte nna

+

-

Cable specifications

A Min. 0.5 mm2 L.max 20m
B Coax RG 58 L.max 100m. Shield connected to minus.
C Coax RG 58 L.max 100m. Shield connected to minus.
D Standard antenna cable, do not change length of this cable

HDPE antenna types 50x50 art.no 9887881

40x120 art.no 9886095
60x100 art.no 9886257

LED indicators

D

POWER

ANT ON

PWR LIMIT

Green on Power on
Off No power

Blue Antenna switch on by the SF4
Off Antenna switch off by the SF4

Red on Antenna power to high, reduce antenna power of the

SF4

TUNING /ID

Off Antenna power ok

Green on
Green blinking
Red on Antenna out of range
Red on Antenna out of range
Red blinking Antenna error

Antenna ok
Antenna ok and tag identified

Antenna tuning

Set the SF4 in “id” mode. Turn with Lt in the antenna tuner untill the “tuning/id” led is green.

More details about the HDPE antenna tuner see also figure 3.

Fig. 4 Overview SF4 + Booster cable connections with walk-by ID

Single Feeder 4 - 15 - 10/2005 Version 0.2

Fig. 5 Display menu

1

General overview, menu can be different for
prom types and versions

2

1. Set Address

3

2. Display Address

3. Responder select ri (iso)
Prom can not be used when ri is not available

4

4. Adjust Antenna, not used

5. Adjust Power

5

6. Adjust Squelch, not used

6

7. Not used

7

8. Test identification

8

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

Single Feeder 4 - 16 - 10/2005 Version 0.2