MANUEL D'INTERFACE MOL81 485 1312 MOL81 485 1337 USER MANUAL Document reference: MOL81 485 1312-MOL81 485 1337-UM-1.4-EN BALOGH SA BALOGH TAG 189 Rue d’Aubervilliers - CP 97 - 75886 Paris Cedex 18 - France Téléphone: 33 (0)1 44 65 65 00 Fax: 33 (0)1 44 65 65 10 Web: http://www.balogh-rfid.
MOL81 485 1312/MOL81 485 1337 TABLE OF CONTENTS 1 FOREWORD ............................................................................................................................................................... 3 1.1 PURPOSE OF THIS MANUAL.................................................................................................................................. 3 1.2 DOCUMENT STATUS SHEET ........................................................................................................
MOL81 485 1312/MOL81 485 1337 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 1 0 20/10/2010 First edition. 1 1 11/10/2011 1 2 1 3 1 4 1.3 Date Description of changes 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) §2.
MOL81 485 1312/MOL81 485 1337 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.
MOL81 485 1312/MOL81 485 1337 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.
MOL81 485 1312/MOL81 485 1337 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. MOL81 485 1312-MOL81 485 1337-UM-1.
MOL81 485 1312/MOL81 485 1337 • MOL81 485 1337: The presence of metal in the device vicinity must be strictly controlled: In order to guarantee correct range: Fig. 1 Fig. 2 a • 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 Fig. 3 • MOL81 485 1312: In order to guarantee correct range: Fig. 1 Fig.
MOL81 485 1312/MOL81 485 1337 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.
MOL81 485 1312/MOL81 485 1337 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. RS-485 MOL81 5.2 HOST Transmission characteristics Baudrate and format are fixed: 19200 bits/s 8 data bits, no parity, 1 stop bit MOL81 485 1312-MOL81 485 1337-UM-1.
MOL81 485 1312/MOL81 485 1337 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.
MOL81 485 1312/MOL81 485 1337 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.
MOL81 485 1312/MOL81 485 1337 Command: Reply: 01 CF 00 42 00 03 C1 C2 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: 6.
MOL81 485 1312/MOL81 485 1337 Command: Reply: 01 CF 00 49 00 01 C1 C2 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: Reply: 01 CF 00 40 00 01 C1 C2 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.
MOL81 485 1312/MOL81 485 1337 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: Reply: 02 10 00 4B 00 01 01 AD 00 C1 C2 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.
MOL81 485 1312/MOL81 485 1337 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. ID1 PRESENCE 12 ms ID1 read twice Figure 7.1 : the “PRESENCE” output.
MOL81 485 1312/MOL81 485 1337 8 CONNECTORS The connectors used belong to the SOURIAU UTO series, size 12, with 8 pins, IP67 watertight, with EMIcompatible 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.
MOL81 485 1312/MOL81 485 1337 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 2 2 - Socket contacts: RC16M23K (e.g. for wires of 0.5mm to 1.5mm (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.
MOL81 485 1312/MOL81 485 1337 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.
MOL81 485 1312/MOL81 485 1337 Appendix 1 : Specification Drawing MOL81 485 1312-MOL81 485 1337-UM-1.
MOL81 485 1312/MOL81 485 1337 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.
