0307mu4040CE-0 4140OEM BINARY PROTOCOL FOR 1 LOAD
Contents
1. Sw2 1 Sw2 2 Sw2 3 Number of loadcells OFF OFF OFF 1 ON OFF OFF 1 OFF ON OFF 1 ON ON OFF 1 OFF OFF ON 1 ON OFF ON 1 OFF ON ON 1 ON ON ON 1 Sw2 4 Sw2 5 Averaging period Tavg OFF OFF 2 ms ON OFF 10 ms OFF ON 50 ms ON ON 100 ms NOTE The default power on value for averaging period selected using DIP switches can be changed during operation by using a Set Average Period request telegram see protocol description Sw2 6 Resolution OFF 1 gram i e 1 equals I gram ON 0 1 gram i e 1 equals 0 1 gram NOTE The default power on value for resolution selected using DIP switches can be changed during opera tion by using a Set Resolution request telegram see protocol description SWITCH FUNCTION Sw2 7 Reserved for future use SWITCH FUNCTION Sw2 8 Polled Continuous operation OFF Polled operation see protocol description ON Continuous operation see protocol description NOTE The default power on value for mode selected using DIP switches can be changed during operation by using a Set Mode request telegram see protocol description Version 2013 03 11 rev 0 Page 16 Eilersen Industrial Sensors 4 2 2 Jumper settings 4040C User manual The 4040C communication module is internally equipped with 4 jumpers named P2 P3 P42. EE RE ER EE 16 4 2 2 Jumper SENER E H 17 423 Light Emitting Diodes LEDS cacecatesantuncenesscecnansacvtinactiveeteaancuncznncovalypteteny eeceusacaneceeauaasenyeees 17 ITM ENN 17 Version 2013 03 11 rev 0 Page 2 Eilersen Industrial Sensors 4040C User manual 2 INTRODUCTION 2 1 Introduction This document describes the use of a 4040C communication module from Eilersen Elec tric when it is equipped with the program listed on the front page With the program specified on the front page the 4040C communication module is capable of transferring weight data from a connected loadcell on an RS485 channel using a binary protocol By use of DIP switches it is possible to select the resolution 0 1 gram or 1 gram by which the weight is represented By use of DIP switches it is possible to configure the averaging period to 2 10 50 or 100 ms By use of DIP switches it is possible to include one of 15 different FIR filters that will be used to filter the loadcell signal By use of communication on the RS485 channel it will be possible to change the default power up settings determined by DIP switches for communication mode resolution av eraging period and filter number used The external device will typically be a PC that is connected through a RS485 to USB con verter Version 2013 03 11 rev 0 Page 3 Eilersen Industrial Sensors 4040C User manual 3 DATA EXCHANGE 3 1 BIN Mode Binary Mod
3. F lt number gt lt BCC gt lt ETX gt The specific request and their corresponding response telegrams are described in detail in the following Version 2013 03 11 rev 0 Page 5 Eilersen Industrial Sensors 4040C User manual 3 3 1 Read Weight telegram The 4x40C system unit is capable of receiving a Read Weight request telegram The tele gram is used to read the status and weight of the loadcell The telegram is ONLY allowed when Polled operation is selected The Read Weight request telegram has the following format lt STX gt W lt BCC gt lt ETX gt Apart from the start checksum and end characters the request telegram contains W is a W character ASCII 57h When the 4x40C system unit receives a Read Weight request telegram or whenever the average period expires in Continuous operation a Read Weight response telegram is transmitted from the 4x40C system unit as an acknowledge The Read Weight response telegram has the following format STX S8 lt WWWW gt lt BCC gt lt ETX gt Apart from the start checksum and end characters the response telegram contains SS Status value for loadcell x The value is a 2 byte one word 16 bit unsigned integer bi nary number with MSB first indicating the status code of loadcell x WWWW Weight value for loadcell x The value is a 4 byte one double word 32 bit signed inte ger binary number with MSB first indicating the curren
4. and P5 In this system these jumpers must be set as follows JUMPER POSITION P2 OFF Loadcell connected to 4040C NOT accessible using SEL1 P3 OFF Loadcell connected to 4040C NOT accessible using SEL6 P4 OFF Loadcell connected to 4040C NOT accessible using SEL1 P5 OFF Loadcell connected to 4040C NOT accessible using SEL6 4 2 3 Light Emitting Diodes LEDs The 4040C communication module is internally equipped with a number of status lamps light emitting diodes The lamps have the following functionality LED FUNCTION D11 Reserved for future use Red D12 Reserved for future use Red D13 Reserved for future use Yellow D14 Reserved for future use Yellow 4 2 4 JTAG connector The 4040C communication module is internally equipped with a JTAG connector The con nector J4 is used exclusively by Eilersen Electric A S for download of software to the Cyg nal processor Version 2013 03 11 rev 0 Page 17
5. 0dB OFF ON OFF OFF 2 9 100Hz 20Hz 4 0Hz 2 0Hz 60dB ON ON OFF OFF 3 9 120 Hz 24Hz 4 8 Hz 24 Hz 80dB OFF OFF ON OFF 4 12 80Hz 16Hz 32Hz 16Hz 60dB ON OFF ON OFF 5 12 100 Hz 20Hz 40Hz 2 0 Hz 80dB OFF ON ON OFF 6 15 80Hz 16Hz 32Hz L6Hz 80dB ON ON ON OFF 7 17 60 Hz 12Hz 24Hz 1 2 Hz 60dB OFF OFF OFF ON 8 21 60 Hz 12Hz 2 4Hz 1 2 Hz 80dB ON OFF OFF ON 9 25 40 Hz 8 Hz 1 6Hz 0 8 Hz 60dB OFF ON OFF ON 10 32 40Hz 8Hz L6Hz O8Hz 80dB ON ON OFF ON 11 50 20Hz 4Hz 0 8Hz 04Hz 60dB OFF OFF ON ON 12 64 20Hz 4Hz O8Hz 04Hz 80dB ON OFF ON ON 13 67 15Hz 3Hz 0 6Hz 03Hz 60dB OFF ON ON ON 14 85 15Hz 3Hz 06Hz 03Hz 80dB ON ON ON ON 15 100 10Hz 2Hz 04Hz 02Hz 60dB NOTE With all four switches OFF no filtering is performed NOTE The default power on filter number 0 15 selected using DIP switches can be changed during operation by Page 13 Eilersen Industrial Sensors 4040C User manual 4 HARDWARE DESCRIPTION 4 1 4x40C front panel This chapter describes the connections DIP switch settings and lamp indications that are available on the 4x40C front panel 4 1 1 Connection of power The 4x40C system unit is powered by applying 24VDC on a two pole connector as speci fied on the front panel of the 4x40C system unit This powers the 4040C communication module as well as the l
6. DIP switches can be changed during opera tion by using a Set Filter Number request telegram see protocol description 4 1 5 Light Emitting Diodes LEDs The front panel of the 4x40C system unit is equipped with a number of status lamps light emitting diodes The lamps that are mounted on the 4040C communication module have the following functionality LED FUNCTION TxLC 4040 communication with loadcells Yellow Lit when communicating with the connected loadcells TxBB 4040 communication Right Green Lit when communicating externally LCl Status for loadcell 1 Red Lit if the connection to loadcell 1 is broken LC2 Status for loadcell 2 Red Lit if the connection to loadcell 2 is broken LC3 Status for loadcell 3 Red Lit if the connection to loadcell 3 is broken LC4 Status for loadcell 4 Red Lit if the connection to loadcell 4 is broken Version 2013 03 11 rev 0 Page 15 Eilersen Industrial Sensors 4040C User manual 4 2 4040C communication module This chapter describes the connections DIP switch settings and status lamps LEDs that are available internally on the 4040C communication module 4 2 1 SW2 settings The 4040C communication module is internally equipped with a 8 pole DIP switch block named SW2 Please note that these switches are ONLY read during power on This DIP switch block has the following function
7. Eilersen Industrial Sensors Applies for Program no Document no Date Rev Kokkedal Industripark 4 DK 2980 Kokkedal Denmark info eilersen com Tel 45 49 180 100 Fax 45 49 180 200 4040C COMMUNICATION MODULE BIN communication in a 4x40C system BIN_1LC 130307 0 0307mu4040CE 0 DOC 2013 03 11 0 Eilersen Industrial Sensors 4040C User manual 1 CONTENTS D CONTENTS sansen ened ikke 2 NET 3 Te 3 3 DATA EXCHANGE TR P 4 3 1 BIN Mod Binary Mode E 4 3 2 Polled Continnous OperaltOD iei tai bet etnte odo nee dd p ed srania ekranini i EIUS 4 3 3 Protocol descripti ema qur ho bate e nM Dni qa up aurea 5 3 24 Re Weight Tapene 6 3 3 2 Set Mode telegra sisirin 7 3 3 3 Set R solution AGO RT AID EE NTE 8 3 34b Ser Averape Period tele OT ANN serranas EE EEE E tasa D etre an 9 3 3 5 Set Filter Number telegram AG 10 3 30 Telegram examples NE n 11 SE SPInicdcurqmenl c M 12 Te 13 4 HARDWARE DESCRIPTION 22 324 e eee atic Ae Oe ee ee aed 14 4 1 4340C EE 14 4 1 1 Connection of EEE EE 14 4 1 2 Connection of OC SING vare 14 4 1 3 Connection of external units with J2 connector essere 14 SE SSE T tide 15 4 15 Light Emitting Diodes LEDS iiie peint tet nas do heit alicia side M medtas 15 4 2 4040C communication module c 16
8. Mode request telegram requesting the 4040C module to enter Polled operation All other request telegrams send by the RS485 master will be ignored by the 4040C mod ule Version 2013 03 11 rev 0 Page 4 Eilersen Industrial Sensors 4040C User manual 3 3 Protocol description The 4x40C system unit communicates with the external equipment using a master slave binary protocol where the 4x40C system unit acts as a slave All valid request telegrams from the RS485 master will be acknowledge with a corre sponding response telegram All telegrams request as well as response telegrams are en capsulated by a start character lt stx gt ASCII 02h and an end character lt ETx gt ASCII 03h In addition all telegrams contain a checksum lt Bcc gt Hence all telegrams have the following format lt STX gt lt specific telegram contents gt lt BCC gt lt ETX gt The checksum is calculated by logical XOR of all preceding characters in the telegram includ ing the sTx character i e the Bcc itself and the lt ETX gt character are not included The following request telegrams are available Request Telegram Telegram Format Read Weight lt STX gt W lt BCC gt lt ETX gt Set Mode lt STX gt M lt number gt lt BCC gt lt ETX gt Set Resolution lt STX gt R lt number gt lt BCC gt lt ETX gt Set Average Period lt STX gt A lt number gt lt BCC gt lt ETX gt Set Filter Number lt STX gt
9. a value of 1 corresponds to 0 1 gram resolution All other values are invalid Version 2013 03 11 rev 0 Page 8 Eilersen Industrial Sensors 4040C User manual 3 3 4 Set Average Period telegram The 4x40C system unit is capable of receiving a Set Average Period request telegram The telegram is used to set the desired average period overwriting the default power on value set using Sw2 4 Sw2 5 The telegram is ONLY allowed when Polled operation is selected The Set Average Period request telegram has the following format lt STX gt A lt number gt lt BCC gt lt ETX gt Apart from the start checksum and end characters the request telegram contains A is a A character ASCII 41h lt number gt is a byte binary number 0 255 indicating the desired average period A value of 0 corre sponds to 2 ms a value of 1 corresponds to 10 ms a value of 2 corresponds to 50 ms and a value of 3 corresponds to 100ms All other values are invalid When the 4x40C system unit receives a Set Average Period request telegram a Set Aver age Period response telegram is transmitted from the 4x40C system unit as an acknowl edge The Set Average Period response telegram has the following format lt STX gt a lt number gt lt BCC gt lt ETX gt Apart from the start checksum and end characters the response telegram contains a is a a character ASCII 61h lt number gt is a 1 byte binary number 0 255 indicating the act
10. e The 4040C module will communicate with the following specifications Specification RS485 2 wire Baudrate 115200 bps Data bits 8 Parity None Stop bits 1 Protocol Master Slave BIN protocol as described below 3 2 Polled Continuous operation The 4x40C system unit can be set to either Polled or Continuous operation This is done using Sw2 8 as described later This can be changed during operation by using a Set Mode request telegram see protocol description In Polled operation the 4040C module operates as described in the next chapter i e it only transmits its Read Weight response telegram when it receives a Read Weight request tele gram from its RS485 master In Continuous operation the 4040C module automatically transmits its Read Weight re sponse telegram upon completion of every averaging period i e the 4040C module does NOT need to receive a Read Weight request telegram from its RS485 master NOTE If the 4040C module is placed in Continuous operation the RS485 master should aim at performing transmissions in between transmissions made by the 4040C module This is in order to avoid conflicts on the RS485 bus If this is not possible retransmissions by the RS485 master are necessary until the telegram slips through to the 4040C module NOTE If the 4040C module is placed in Continuous operation the only request telegram allowed to be transmitted by the RS485 master and which the 4040C module will respond to is a Set
11. oadcells 4 1 2 Connection of loadcells The loadcells must be connected to the available BNC connectors in the front panel of the 4x40C system unit The loadcells are connected starting with the connector marked 1 and continuing onwards in rising order Thus if three loadcells are to be connected they should be connected to the BNC connectors marked 1 2 and 3 4 1 3 Connection of external units with J2 connector The 4040C module is connected to an external unit with the J2 connector with these con nections J2 pin Function Connected to 1 B RS485 B please see below 2 A RS485 A please see below 3 I O Not connected 4 GND Gnd Please notice that in some external systems especially German the use of A and B is switched The use of and markings are always the same Version 2013 03 11 rev 0 Page 14 Eilersen Industrial Sensors 4040C User manual 4 1 4 SW1 settings The front panel of the 4x40C system unit is equipped with a 4 pole DIP switch block named SW1 Please note that unless stated otherwise these switches are ONLY read dur ing power on These switches are mounted on the 4040C communication module SWITCH FUNCTION Sw1 1 Sw1 4 Filtering Used to select the desired filter as described in an earlier chapter Note that these switches are read during power on ONLY NOTE The default power on filter number 0 15 selected using
12. operation and a value of 1 corresponds to Continuous operation All other values are invalid Version 2013 03 11 rev 0 Page 7 Eilersen Industrial Sensors 4040C User manual 3 3 3 Set Resolution telegram The 4x40C system unit is capable of receiving a Set Resolution request telegram The telegram is used to set the desired resolution overwriting the default power on value set us ing Sw2 6 The telegram is ONLY allowed when Polled operation is selected The Set Re solution request telegram has the following format lt STX gt R lt number gt lt BCC gt lt ETX gt Apart from the start checksum and end characters the request telegram contains R is a R character ASCII 52h lt number gt is a 1 byte binary number 0 255 indicating the desired resolution A value of 0 corre sponds to I gram resolution and a value of 1 corresponds to 0 1 gram resolution All other values are invalid When the 4x40C system unit receives a Set Resolution request telegram a Set Resolution response telegram is transmitted from the 4x40C system unit as an acknowledge The Set Resolution response telegram has the following format lt STX gt r lt number gt lt BCC gt lt ETX gt Apart from the start checksum and end characters the response telegram contains r is a r character ASCII 72h lt number gt is a byte binary number 0 255 indicating the actual resolution A value of 0 corresponds to 1 gram resolution and
13. t weight signal in the selected reso lution for loadcell x The value is the result of the latest completed averaging Version 2013 03 11 rev 0 Page 6 Eilersen Industrial Sensors 4040C User manual 3 3 2 Set Mode telegram The 4x40C system unit is capable of receiving a Set Mode request telegram The telegram is used to switch between Polled and Continuous operation overwriting the default power on value set using Sw2 8 The telegram is used when Polled as well as when Continuous operation is selected The Set Mode request telegram has the following format lt STX gt M lt number gt lt BCC gt lt ETX gt Apart from the start checksum and end characters the request telegram contains M is a M character ASCII 4Dh lt number gt is a I byte binary number 0 255 indicating the desired mode value of 0 corresponds to Polled operation and a value of 1 corresponds to Continuous operation All other values are invalid When the 4x40C system unit receives a Set Mode request telegram a Set Mode response telegram is transmitted from the 4x40C system unit as an acknowledge The Set Mode re sponse telegram has the following format lt STX gt m lt number gt lt BCC gt lt ETX gt Apart from the start checksum and end characters the response telegram contains m is a m character ASCII 6Dh lt number gt is a I byte binary number 0 255 indicating the actual mode value of 0 corresponds to Polled
14. ture use 0004 Reserved for future use 0008 _ Reserved for future use 0010 Reserved for future use 0020 Reserved for future use 0040 No answer from loadcell Bad connection between loadcell and 4040C 0080 Reserved for future use 0100 Reserved for future use 0200 Reserved for future use 0400 Reserved for future use 0800 No loadcell answer Bad connection between loadcell and 4040C 1000 _ Reserved for future use 2000 Reserved for future use 4000 _ Reserved for future use 8000 _ Reserved for future use Version 2013 03 11 rev 0 Page 12 Eilersen Industrial Sensors 3 5 Filtering By use of DIP switches it is possible to include one of 15 different FIR filters that will be used to filter the loadcell signals Thus it is possible to send the unfiltered loadcell signals achieved over each averaging sample period Tavg through one of the following FIR fil ters before the results are transmitted on the RS485 channel 4040C User manual using a Set Filter Number request telegram see protocol description Version 2013 03 11 rev 0 SW1 1 SW1 2 SW1 3 SW1 4 No Taps Frequency Dampin Tavg Tavg Tavg Tavg 2ms 10ms 50ms 100ms OFF OFF OFF OFF 0 B ON OFF OFF OFF 1 7 120Hz 24Hz 4 8Hz 24 Hz 6
15. ual average period A value of 0 corre sponds to 2 ms a value of 1 corresponds to 10 ms a value of 2 corresponds to 50 ms and a value of 3 corresponds to 100ms All other values are invalid Version 2013 03 11 rev 0 Page 9 Eilersen Industrial Sensors 4040C User manual 3 3 5 Set Filter Number telegram The 4x40C system unit is capable of receiving a Set Filter Number request telegram The telegram is used to set the desired filter number overwriting the default power on value set using Sw1 1 Sw1 4 The telegram is ONLY allowed when Polled operation is selected The Set Filter Number request telegram has the following format lt STX gt F lt number gt lt BCC gt lt ETX gt Apart from the start checksum and end characters the request telegram contains F is a F character ASCII 46h lt number gt is a 1 byte binary number 0 255 indicating the desired filter number The number can have a value of 0 15 corresponding to the 15 different filters and O for no filtering All other values are invalid When the 4x40C system unit receives a Set Filter Number request telegram a Set Filter Number response telegram is transmitted from the 4x40C system unit as an acknowledge The Set Filter Number response telegram has the following format lt STX gt lt number gt lt BCC gt lt ETX gt Apart from the start checksum and end characters the response telegram contains is a fP character ASCII 66h lt n
16. umber gt is a 1 byte binary number 0 255 indicating the actual filter number The number can have a value of 0 15 corresponding to the 15 different filters and 0 for no filtering All other values are invalid Version 2013 03 11 rev 0 Page 10 Eilersen Industrial Sensors 3 3 6 Telegram examples 4040C User manual The following is a list of telegram examples 1 e requests with corresponding responses Telegram type Request Response Read Weight lt 02h gt lt 57h gt lt 55h gt lt 03h gt lt 02h gt lt 00h gt lt 00h gt lt 00h gt lt 00h gt lt 00h gt 81h 83h 03h Set Mode 02h 4Dh 00h 4Fh 03h 02h 6Dh 00h 6Fh 03h Set Resolution 02h 52h 00h 50h 03h 02h 72h 00h 70h 03h Set Average Period 02h 41h 00h 43h 03h 02h 61h 00h 63h 03h Set Filter Number 02h 46h 00h 44h 03h 02h 66h 00h 64h 03h Version 2013 03 11 rev 0 Page 11 Eilersen Industrial Sensors 3 4 Loadcell status codes 4040C User manual The following loadcell status codes are possible If more than one error condition is present the status codes are OR ed together CODE CAUSE Hex 0001 _ Reserved for future use 0002 Reserved for fu
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