Balogh MOL81 485 1312 User manual

BALOGH TAG
3637 Old US-23
Brighton, Michigan MI 48114, USA
Tel: USA 800) 252-RFID 7343)
810) 360-0182
Canada 800) 258-RFID 7343)
Fax: [phone]
BALOGH SA
189 Rue d’Aubervilliers - CP 97 - 75886 Paris
Cedex 18 - France
Téléphone: 33 0)1 44 65 65 00
Fax: [phone]
Web: http://www.balogh-rfid.com
MANUEL D'INTERFACE
MOL81 485 1312
MOL81 485 1337
USER MANUAL
Document reference: MOL81 485 1312-MOL81 485 1337-UM-1.4-EN

MOL81 485 1312/MOL81 485 1337
MOL81 485 1312-MOL81 485 1337-UM-1.4-EN 2/20
TABLE OF CONTENTS
1 FOREWORD...............................................................................................................................................................3
1.1 P URPOSE OF THIS MANUAL .................................................................................................................................. 3
1.2 D OCUMENT STATUS SHEET ................................................................................................................................. 3
1.3 N OTES .................................................................................................................................................................. 3
2 GENERAL INFORMATION ......................................................................................................................................4
2.1 D EVICE DESCRIPTION .......................................................................................................................................... 4
2.2 B ASIC OPERATION ................................................................................................................................................ 5
2.3 P OWER ................................................................................................................................................................. 5
3 MECHANICAL ASPECTS........................................................................................................................................6
3.1 C ASE DIMENSIONS ............................................................................................................................................... 6
3.2 D EVICE ENVIRONMENT ......................................................................................................................................... 6
4 CONFIGURATION.....................................................................................................................................................8
4.1 U SER SETTINGS ................................................................................................................................................... 8
5 CONNECTION TO HOST .........................................................................................................................................9
5.1 I NTRODUCTION ..................................................................................................................................................... 9
5.2 T RANSMISSION CHARACTERISTICS ...................................................................................................................... 9
6 MESSAGES RECEIVED BY READER ................................................................................................................10
6.1 MODBUS P ROTOCOL ....................................................................................................................................... 10
6.2 MODBUS C OMMANDS ..................................................................................................................................... 11
6.3 C OMMAND : R EAD LAST TAG CODE .................................................................................................................... 11
6.4 C OMMAND : 125 KH Z EMITTER CONTROL .......................................................................................................... 12
6.5 C OMMAND : R EAD F IRMWARE V ERSION ............................................................................................................ 12
6.6 C OMMAND : R EAD D EVICE S TATUS ................................................................................................................... 13
6.7 C OMMAND : W RITE PARAMETERS ...................................................................................................................... 14
6.8 C OMMAND : R ESET ............................................................................................................................................. 14
6.9 C OMMAND : W RITE DIGITAL OUTPUTS ................................................................................................................ 14
7 DIGITAL OUTPUTS.................................................................................................................................................15
7.1 125 K H Z OK...................................................................................................................................................... 15
7.2 T AG P RESENCE ................................................................................................................................................. 15
8 CONNECTORS.........................................................................................................................................................16
8.1 C ONNECTOR ON CASE ....................................................................................................................................... 16
8.2 C ONNECTOR FOR CABLE ASSEMBLY ................................................................................................................. 17
8.3 T YPE OF CABLE TO USE ..................................................................................................................................... 17
9 MAINTENANCE .......................................................................................................................................................18
9.1 R EGULAR MAINTENANCE ................................................................................................................................... 18
9.2 D EVICE REPLACEMENT ...................................................................................................................................... 18
9.3 R ECYCLING ........................................................................................................................................................ 18
APPENDIX 1 : SPECIFICATION DRAWING................................................................................................................19
APPENDIX 2 : IMPORTANT NOTE ABOUT FCC RULES ........................................................................................20

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1 FOREWORD
1.1 Purpose of this manual
This manual contains instructions for installing and operating the system.
Performance metrics and other characteristics can be found in the specification sheet.
1.2 Document status sheet
Version
Issue
Date
Description of changes
1 0 20/10/2010 First edition.
1 1 11/10/2011 Details added to §6.1 (code fct 3 or 4) and §7.2
Added §2.3. Translation in English, of the French version 1.1 (2011-10-11)
1 2 02/11//2011
§2.2 Basic operations: correction of behavior errors: no diagnostic and no
asynchronous message.
$7.1 125 KHz OK : no diagnostic function implemented.
1 3 02/14/2013
§2.1: Comment about differences between MOL81-485-1312 and MOL81-
485-1337.
§3.2: Installation requirements.
§4.1: default behaviour of EEPROM status bit. MOL81 parametered in
factory.
§6.3: Comment about CV and CI counters behaviour.
§6.6: Table for the description of status flags behaviour.
§8.3: Cables max length.
1 4 5/17/2013 Added appendix 2
1.3 Notes
The contents of this manual are subject to changes without notice.
BALOGH can not be held responsible for the consequences of any error, omission, or incorrect interpretation of
the information

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2 GENERAL INFORMATION
2.1 Device description
The MOL81 is a short-range transponder designed especially for railway applications. This all-in-one device
with internal antenna will typically be installed on board rolling stock, mounted externally under the vehicle
chassis, in order to do on-the-fly reading of OMR radiofrequency tags placed on the track between the rails.
The data read from the tags is sent to a host computer/controller via a RS485 serial link. This data is used for
real-time locating and depot storage.
The device uses two operating frequencies, a 125 kHz transmitter of a non-modulated carrier for remote
powering of tags and a 6.78 MHz narrow-band receiver for data reception. The unit is self-testing and this
function can be activated via the serial link.
A watertight IP67 connector has pins for DC power, a serial link and digital outputs.
Two digital outputs inform of:
•125 kHz ok
•Tag present
The device's self-test function checks for the correct operation of both the powering transmitter and the data
receiver.
Direction of travel:
The MOL81-485-1312 and the MOL81-485-1337 products are identical, except that the MOL81-485-1337 has
particular adjustments so that it must be mounted on metal.
Sr
Sr : recommended reading height (see product specification).

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2.2 Basic operation
After a reset or a power-up, the MOL81 is ready for use, no other setting up is necessary. When a valid tag is
detected, its identifier can be read with a MODBUS command.
Commands can be sent to the device at any time, for control and for special setups. These commands may be
acknowledged (ACK or NAK) and may receive a response. No asynchronous commands are sent by the
MOL81.
2.3 Power
The MOL81 is powered with 24Vdc, the voltage range acceptable for correct operation is 21Vdc to 29Vdc
(including any ripples). Typical current drawn at 24Vdc is 600mA, with a maximum of 1A. The power module is
protected against polarity inversions.
Any changes in settings are memorised, so that after a reset the same settings are used as before the previous
power-down. In particular, if the 125 kHz emitter was deactivated before power-down, it will still be deactivated
after power-up.
Conversely, if the 125 kHz emitter was activated after power-up, it will also be activated at the next power-up, if
no configuration changes have been made. In this case, the activation time for the 125 kHz emitter is roughly
250 ms.

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3 MECHANICAL ASPECTS
3.1 Case dimensions
Size (mm): 250 x 103.5 x 67.5
Mounting axes (mm): 225 x 60
Mounting with 4 x M5 screws
Thickness at mounting points: 4 mm
For more information, see Appendix 1 : Specification Drawing .
3.2 Device environment
•The distance between 2 MOL81 devices must be at least 2 meters.

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•MOL81 485 1337: The presence of metal in the device vicinity must be strictly controlled:
•MOL81 485 1312:
a
a
Fig. 1
Fig. 2
Fig. 3
In order to guarantee correct range:
•
The device must be mounted directly onto a metallic
plate which extends at least 10cm (a) beyond the
base in both directions
• Beyond this distance, the device can be recessed
(see figure 2), but not deeper than the height of the
case
a
a
In order to guarantee correct range:
•The device must
not be installed directly on
metal and can be mounted directly onto
wooden sleepers. Metallic masses shall be
distant of at least 10 cm (a).
• Beyond this distance, the device can be
recessed (see figure 2), but not deeper
than the height of the case.
Fig. 1
Fig. 2
Fig. 3

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4 CONFIGURATION
4.1 User settings
One parameter stored in non-volatile memory can be changed by the user:
•MODBUS slave address – values from 1 to 254
It can be modified using the command "Write Parameters" (see §6.7)
The default value is:
•MODBUS slave address: 1
After first startup, the default Modbus address is applied and the EEPROM is not initialized until the slave
address is modified. Thus, the EEPROM status bit is still 0 until a write parameters command is processed by
the MOL81.
This parameter is set to 1 in factory.

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5 CONNECTION TO HOST
5.1 Introduction
The reader is connected to a host using a serial asynchronous two-wire RS 485 link. Other devices can be
connected on the same link.
5.2 Transmission characteristics
Baudrate and format are fixed:
19200 bits/s
8 data bits, no parity, 1 stop bit
RS-485
MOL81 HOST

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6 MESSAGES RECEIVED BY READER
6.1 MODBUS Protocol
This is a master/slave protocol. Each exchange is initiated by the master and consists, except in one case
(broadcast message), of an exchange of two frames - a command issued by the master and a reply from the
slave. All frames have the following structure:
1 byte 1 byte n bytes 2 bytes
Slave address Function code
data control
The MOL1312 is a slave on a MODBUS network
The commands issued by the master are either addressed to one slave (identified by its address) or to all
slaves on the network (broadcast).
Each message or frame contains 4 fields:
•The slave address (1 byte):
Specifies the destination, from 1 to 254. If the address is 0 (zéro), it is a broadcast message. In this case
there is no reply.
•the function code (1 byte):
Determines the type of action to be performed (read, write, bit, word) and, in the reply, indicates if the
message was received correctly.
•The data field (n bytes):
Contains the parameters associated with the function: command code, number of bytes, values.
•Control field (2 bytes):
For error detection (CRC 16).
The MODBUS protocol defines 12 functions (second field in frame). Two of them are implemented on the
MOL81:
•function code 3 or 4 - read n words (*)
•function code 16 - write n words
(*) for reading n words, the MOL 81 accepts function codes 3 and 4.
If the message is received with errors (CRC incorrect), the reader does not reply. If the message is received
correctly but the reader cannot process it, an error message is sent. This error message has its function code
field modified, (the msb is set to 1) and the data field contains one byte, an error code with the following values :
Error type Error code
Function code unknown 1
Command unknown 2
Data incorrect 3
System non ready 4
Execution failure 8
Figure 6-1: MODBUS error codes

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The maximum time allowable between the reception of two characters is a protocol parameter which allows a
slave to resynchronise to a frame-start, if transmission is interrupted. If this time is exceeded, the slave rejects
the frame currently being received.
For the MOL81 MODBUS this time is 2ms.
A general description for the two implemented MODBUS functions is given here. See the following chapters for
a more detailed description of each command.
Write n words (function code 16)
-Command
2 bytes 2 bytes 1 byte n bytes 2 bytes
Device address 10H command nb of words nb of characters values * CRC 16
* words to be written, in order
A word consists of two bytes, high-order byte first
-Reply
2 bytes 2 bytes 2 bytes
Device address 10H command nb of words CRC 16
If the address is 00H, all the devices process the command without sending a reply.
Read n words (function code 3 or 4)
-Command
2 bytes 2 bytes
Device address 03 command nb of words CRC 16
-Reply
1 byte n bytes
Device address 03 nb of characters read
†
values* CRC 16
* bytes read, in order
†
number of characters read = 2 X number of words in Command (always even)
6.2 MODBUS Commands
These commands either perform an action (WRITE) or retrieve information (READ).
The following table contains all commands that can be sent to the device:
N° Commands Fct code Command
(hex) Data sent Data received
1 Read status 3 or 4 0040 1 word status nb words = 1
2 Read tag 3 or 4 0042 3 words nb words = 3
3 Emission 125KHz 16 0043 1 word emission
4 Reset device 16 0045 1 byte ( 0 = reset )
5 Read firmware version 3 or 4 0049 1 word version nb words = 1
6 Write Setup 16 004B 1 word config
7 Write Outputs 16 0052 1 word sortie
6.3 Command: Read last tag code
This command will retrieve the most recently read tag. The reply contains 3 words.

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Command: 01 CF 00 42 00 03 C1 C2
Reply: 01 CF 06 00 ST CH CL CV CI C1 C2
where CF = 3 or 4
ST = status byte (for details see §6.6).
CH = tag code, high-order byte.
CL = tag code, low-order byte.
CV = counter for valid tag sightings.
CI = counter for invalid tag sightings.
CV and CI counters are reset when:
- A new code is read twice (i.e. on VA and NC status bits rising edge).
-The same tag disappears and appears again.
Examples:
Command: 01 03 00 42 00 03 A5 DF
Reply: 01 03 06 00 8D 33 34 20 30 C1 C2 (new valid code = 0x3334)
Command: 01 04 00 42 00 03 10 1F
Reply: 01 04 06 42 81 00 00 00 00 C1 C2 (no code available)
6.4 Command: 125 KHz emitter control
This command will activate or deactivate the 125 kHz emitter. The command can be sent at any time..
Command: 01 10 00 43 00 01 01 EM 00 C1 C2
Reply: 01 10 00 43 00 01 F0 1D
where EM contains one useful bit:
D7
D0
0
0
0
0 0
0 0
VE
VE : Activate emission ( 0 = activate, 1 = deactivate )
Example:
Command: 01 10 00 43 00 01 01 01 00 59 33 (deactivate emission)
Reply: 01 10 00 43 00 01 F0 1D
Command: 01 10 00 43 00 01 01 00 00 58 A3 (activate emission)
Reply: 01 10 00 43 00 01 F0 1D
6.5 Command: Read Firmware Version
This command reads the firmware version.
The reply contains one word version (2 bytes, high-order byte first).
D15 D12
D11
D8 D7
D4
D3
D0
type version major revision minor revision
where type identifies the equipment. Only one value is currently defined:
11 (0xBH) – MOL1312
The other 3 nibbles define the version number coded in BCD, e.g. 012H corresponds to 0.1.2

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Command: 01 CF 00 49 00 01 C1 C2
Reply: 01 CF 02 B1 23 C1 C2 (MOL1312, version 1.23)
where CF = 3 or 4
6.6 Command: Read Device Status
This command will read the device status. The reply contains one byte status.
Command: 01 CF 00 40 00 01 C1 C2
Reply: 01 CF 02 00 ST C1 C2
where CF = 3 or 4
ST has the following structure:
7 6 5 4 3 2 1 0
125 0 0 0 VA NC AC EE
EE: EEPROM OK, active 1.
AC: a tag is present, active 1.
NC: new code available, active 1.
VA: a new code is valid.
125: 125 kHz emitter state, active 1.
The following table describes the conditions of activation/deactivation of this flags, on the MOL81-1312 and the
MOL81-1337:
Flag 1 0
125 MOL81-1312:
The 125 KHz emitter is operational.
MOL81-1337:
The MOL81 is installed on a metal plate and
the 125 KHz emitter is operational.
MOL81-1312:
The 125 KHz emitter is not operational.
MOL81-1337:
The MOL81 is not installed on a metal plate or
the 125 KHz emitter is not operational.
VA The MOL81 has read the same code
successfully twice The MOL81 has read one new code successfully, not consolidated by a second
reading.
NC Set when VA is set (after 2 properly readings)
Reset when a new code has been read
successfully but not consolidated by a new
reading or,
A Read Last Tag Code command was
received.
AC Set when a properly reading has been done. Reset when no properly reading has been
done.
EE The configuration parameter has been
modified with a “Write Parameters” command
(see §6.7)
The non volatile memory is corrupted
Examples:
Command: 01 03 00 40 00 01 85 DE
Reply: 01 03 02 00 89 78 24 (125 kHz active, A new code is valid, EEPROM ok)

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6.7 Command: Write parameters
This command will write parameters into non-volatile EEPROM memory. Currently only one parameter has
been defined:
•Parameter 1 = MODBUS address
Command: 02 10 00 4B 00 01 01 AD 00 C1 C2
Reply: 02 10 00 4B 00 01 71 EC
AD = MODBUS address, can take on values from 1 to 254, other values will produce an error.
Examples:
Command: 02 10 00 4B 00 01 01 02 00 4C 7B (adresse = 2)
Reply: 02 10 00 4B 00 01 71 EC
Command: 02 10 00 4B 00 01 01 00 00 4D 1B (address = 0)
Reply: 02 90 03 FC 01 (error)
Nota: new parameters are applied after the reader’s reset.
6.8 Command: Reset
This command will produce a hardware reset of the device. It can be sent at any time. After the reset, the
device will be in the same state as after a power-up.
Command: 01 10 00 45 00 01 01 00 00 58 C5
Reply: 01 10 00 45 00 01 10 1C
6.9 Command: Write digital outputs
This command allows testing the digital outputs (PRESENCE and 125 kHZ). It can be sent at any time.
Command: 01 10 00 52 00 01 01 SP S1 C1 C2
Reply: 01 10 00 52 00 01 A0 18
where SP = 0 to activate the PRESENCE output, any other value will deactivate.
where S1 = 0 to activate the 125 kHz output, any other value will deactivate.
Example:
Command: 01 10 00 52 00 01 01 00 FF 1B A2 (only PRESENCE output activated)
Reply: 01 10 00 52 00 01 A0 18
Command: 01 10 00 52 00 01 01 00 00 5B E2 (both outputs activated)
Reply: 01 10 00 52 00 01 A0 18
Command: 01 10 00 52 00 01 01 FF FF 5A 52 (both outputs deactivated)
Reply: 01 10 00 52 00 01 A0 18

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7 DIGITAL OUTPUTS
7.1 125 kHz OK
This output is active (high) at start-up.
It can be activated or deactivated with the “Write Digital Outputs” command.
7.2 Tag Presence
This output goes active as soon as a tag is detected and goes inactive 12 ms after the last successful tag
detection.
Figure 7.1 : the “PRESENCE” output.
Special case of two narrowly-separated tags
When a second tag is detected before the output "PRESENCE" for the first tag has fallen, then the output is
forcibly deactivated for a fixed time of 20ms in order to indicate the detection of the second tag.
Figure 7.2 : the “PRESENCE” output with two closely spaced tags.
As soon as the second tag has been seen twice, the output falls (for 20ms) and the its ID becomes available for
reading.
ID1
<12 ms
PRESENCE
ID1 read twice
ID2
20 ms
ID2 read twice
12 ms
ID1
12 ms
PRESENCE
ID1 read twice

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8 CONNECTORS
The connectors used belong to the SOURIAU UTO series, size 12, with 8 pins, IP67 watertight, with EMI-
compatible shielding. These are metallic circular connectors with bayonet coupling.
8.1 Connector on case
The case connector is a panel-mount 8-pin plug with jam-nut receptacle.
References:
-Plug: UTO71208PH
-Pins: RM20M12E8K
The pins have a diameter of 1.6mm.
The table shows the pin assignments:
External view of connector
(rear-view of cable assembly connector)
The two-wire serial link uses pins C and F.
* For a 120ohm line termination, pins B and E can be connected together if necessary for RS485 long cable
Figure 8-1: Connection diagram for normal RS485 operation with line termination
D
A
C
(A)
(B)
(COM)
Controller or PC
(A)
(B)
MOL81
F
B
* E
(V
AL
)
(Output " PRESENCE ")
H
G
(0V)
RS485
Pin Signal/Name
A Power (+ 24V DC)
B Line termination 120ohms (can be connected to E)
C RS485 +
D 0 V
E Line termination 120ohms (can be connected to B)
F RS485 -
G Output : PRESENCE
H Output : 125 kHz OK
(Output "125 kHz OK")

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8.2 Connector for cable assembly
The connector for the cable belongs to the SOURIAU UTO series, size 12, with 8 pins
The socket connector references are:
- Shell: UTO6128SH
- Socket contacts: RC16M23K (e.g. for wires of 0.5mm
2
to 1.5mm
2
(AWG16 to AWG20))
- Hood and cable-gland: UTOS12JCSL (long version for cables from ∅13,5 to 18mm).
These references are examples, please check with the manufacturer for availability.
The socket contacts must be chosen according to individual wire size gauges. The above reference is for wire
sizes from 0.5mm2 to 1.5mm2 (AWG16 to AWG20). See SOURIAU documentation for other references.
The hood for the female socket must be chosen according to the outside diameter of the cable. The above
reference is for cable sizes from 8mm to 12.5mm. See SOURIAU documentation for other references.
8.3 Type of cable to use
The cable to be used must be shielded with the following characteristics :
•6 wires:
- Power : 2 wires
- Serial link RS485 : 1 twisted pair 120Ω (*)
- Outputs : 2 wires
- Shield : 360° contact to connector
•Wires are connected using crimping; wire cross-section: 0.5 to 1.5 mm²
•Outside cable diameter: 8 to 12.5 mm
•Max length for RS485 cable: 1200 m.
•Max length for power supply cable : 100 m.
----------------------------------------------------------------------------
(*) MOL81 485 line termination to be connected if necessary, pins B to E.

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9 MAINTENANCE
9.1 Regular maintenance
The MOL81 requires no regular maintenance.
The unit should be regularly cleaned to avoid accumulation of dirt.
The unit should be regularly checked for:
- cracks in the case
- broken mounting points
- missing mounting screws
- screws tightened with specified torque
- connectors correctly locked
MOL81 operation should be regularly checked according to the above procedure.
9.2 Device replacement
If the MOL81 needs to be replaced, the procedure is as follows:
- Turn the knurled ring of the plug anti-clockwise (1/3 turn) to unlock the connectors
- Remove the 4 mounting screws and dismount the unit, taking care to record the orientation
- Place the new MOL81 in the same position, insert the 4 mounting screws and tighten to the specified
torque
- Insert connector and turn the knurled ring clockwise (1/3 turn) until locked.
Check for correct operation according to the procedure above.
9.3 Recycling
All decommissioned units must be returned to BALOGH SA for appropriate recycling according to directive
D3E.

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Appendix 1 : Specification Drawing

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Appendix 2 : Important note about FCC rules
Changes or modifications not expressly approved by the party responsible for compliance could void
the user’s authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to pro-vide reasonable
protection against harmful interference when the equipment is operated in a commercial environment.
This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used
in accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case
the user will be required to correct the interference at his own expense.