Multiples Unit ID on the same TCP Server
simonR35 opened this issue · 4 comments
Which node-red-contrib-modbus version are you using?
5.14.0
What happened?
Hi,
I'm trying to get multiples Unit ID on the same Modbus Server.
My goal is to have a unique Modbus TCP Server on the listening port 502 and to have multiple Unit ID (1 to 250).
But when i'm trying to write values on Unit ID 2, this is also changing the values on Unit ID 1.
Is someone got the same result ?
Best regards,
Server
Modbus-Server Node
How can this be reproduced?
[{"id":"38944507.17537a","type":"tab","label":"Elsys ERS2 Lite","disabled":false,"info":""},{"id":"cc6af8ca.953998","type":"function","z":"38944507.17537a","name":"Test décodage trame","func":"var packet = msg.payload; //Récupération de la trame\nvar longueur = (packet.length) - 1;\nmsg.longueur = longueur;\nvar n = 0;\nwhile (n != 999999)\n{\n if (n <= longueur)\n {\n byte1 = packet[n].toString(2);\n msg.byte1 = byte1;\n //Récupère le premier octet "sensor type"\n var bin1 = "0";\n if (byte1.length != 8)\n {\n if (byte1.length == 7){\n bin1="0"+byte1;\n }\n if (byte1.length == 6){\n bin1="00"+byte1;\n }\n if (byte1.length == 5){\n bin1="000"+byte1;\n }\n if (byte1.length == 4){\n bin1="0000"+byte1;\n }\n if (byte1.length == 3){\n bin1="00000"+byte1;\n }\n if (byte1.length == 2){\n bin1="000000"+byte1;\n }\n if (byte1.length == 1){\n bin1="0000000"+byte1;\n }\n } \n else {\n bin1=byte1;\n }\n msg.bin1=bin1;\n \n //Traitement de l'octet "sensor type"\n //On récupère les deux premiers bits NOB et on calcule le nombre de bits d'offset\n var nob1 = 0;\n nob1 = parseInt((bin1.slice(0,2)),2);\n msg.nob1 = nob1;\n switch (nob1){\n case 0 : //Si il n'y aucun bit d'offset\n tempo = 0;\n break;\n case 1 : //S'il y a un seul octet d'offset\n tempo = packet[(n + 2)].toString(16);\n tempo = parseInt(tempo,16);\n break;\n case 2 : //S'il y a 2 octest d'offset\n tempo1 = packet[(n + 2)].toString(16);\n tempo2 = packet[(n + 3)].toString(16);\n if (tempo2.length == 1){\n tempo2 = "0"+ tempo2;\n }\n tempo = tempo1.concat(tempo2);\n tempo = parseInt(tempo,16);\n break;\n case 3 : //S'il y a 3 octets d'offset\n tempo1 = packet[(n + 2)].toString(16);\n tempo2 = packet[(n + 3)].toString(16);\n if (tempo2.length == 1){\n tempo2 = "0"+ tempo2;\n }\n tempo3 = packet[(n + 4)].toString(16);\n if (tempo3.length == 1){\n tempo3 = "0"+ tempo3;\n }\n tempo = (tempo1.concat(tempo2)).concat(tempo3);\n tempo = parseInt(tempo,16);\n break;\n case 4 : //S'il y a 4 octets d'offset\n tempo1 = packet[(n + 2)].toString(16);\n tempo2 = packet[(n + 3)].toString(16);\n if (tempo2.length == 1){\n tempo2 = "0"+ tempo2;\n }\n tempo3 = packet[(n + 4)].toString(16);\n if (tempo3.length == 1){\n tempo3 = "0"+ tempo3;\n }\n tempo4 = packet[(n + 5)].toString(16);\n if (tempo4.length == 1){\n tempo4 = "0"+ tempo4;\n }\n tempo = ((tempo1.concat(tempo2)).concat(tempo3)).concat(tempo4);\n tempo = parseInt(tempo,16);\n break;\n default :\n tempo = 0;\n break;\n }\n \n //on récupère les 6 derniers bits qui correspondent au stype\n var stype = parseInt((bin1.slice(2,8)),2);\n msg.stype=stype;\n //Test du type de capteur envoyé par la trame\n switch (stype){\n case 1 : //si le stype correspond à un capteur de température\n byte2 = packet[(n + 1)].toString(16);\n byte3 = packet[(n + 2)].toString(16);\n if(byte3.length == 1){\n byte3 = "0" + byte3;\n }\n temp = byte2.concat(byte3);\n msg.temp = parseInt(temp,16);\n msg.tempotemp = tempo;\n n += 3 + nob1;\n break;\n case 2 : //si le stypes correspond à un capteur d'hygrométrie\n byte2 = packet[(n + 1)].toString(16);\n msg.hygro = parseInt(byte2,16);\n msg.tempohygro = tempo;\n n += 2 + nob1;\n break;\n case 7 : // si le stype correspond à la tension de la batterie\n byte2 = packet[(n + 1)].toString(16);\n byte3 = packet[(n + 2)].toString(16);\n if(byte3.length == 1){\n byte3 = "0" + byte3;\n }\n batt = byte2.concat(byte3);\n msg.batt = parseInt(batt,16);\n msg.tempobatt = tempo;\n n += 3 + nob1;\n break;\n default : // si le stype ne correspond à aucune type configuré\n n = 999999;\n break;\n }\n }\n else{\n n = 999999;\n }\n}\nreturn msg;","outputs":"1","noerr":0,"initialize":"","finalize":"","x":540,"y":200,"wires":[["c2849643.087188"]]},{"id":"dbf7c134.26663","type":"debug","z":"38944507.17537a","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":290,"y":120,"wires":[]},{"id":"5541c1a5.3f5d1","type":"debug","z":"38944507.17537a","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":230,"y":300,"wires":[]},{"id":"32a25b48.638904","type":"LoRa Input","z":"38944507.17537a","name":"","devEUI":"","extendedField":"","x":115,"y":200,"wires":[["5ae25a77.6b1ad4","5541c1a5.3f5d1"]],"l":false},{"id":"5ae25a77.6b1ad4","type":"Device Filter","z":"38944507.17537a","name":"","eui":"A81758FFFE08CBAA","x":250,"y":200,"wires":[["dbf7c134.26663","2784d4a0.623e5c","8e52e289.300db"]]},{"id":"2784d4a0.623e5c","type":"function","z":"38944507.17537a","name":"Payload to hex","func":"var buf = Buffer.from(msg.payload, "base64");\nmsg.payload = buf;\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":375,"y":200,"wires":[["cc6af8ca.953998","e1cde139.74d4f"]],"l":false},{"id":"e1cde139.74d4f","type":"debug","z":"38944507.17537a","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":510,"y":120,"wires":[]},{"id":"8e52e289.300db","type":"function","z":"38944507.17537a","name":"Date & heure de la trame","func":"var time = msg.time;\nvar year = time.substring(2,4);\nvar month = time.substring(5,7);\nvar day = time.substring(8,10);\nvar hour = time.substring(11,13);\nvar minutes = time.substring(14,16);\nvar seconds = time.substring(17,19);\nmsg.ym = parseInt(year + month);\nmsg.dh = parseInt(day + hour);\nmsg.ms = parseInt(minutes + seconds);\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":550,"y":260,"wires":[["3b4321a1.80920e"]]},{"id":"3d20214d.7ad45e","type":"modbus-write","z":"38944507.17537a","name":"Ecriture mesures","showStatusActivities":false,"showErrors":false,"unitid":"1","dataType":"MHoldingRegisters","adr":"0","quantity":"6","server":"3aa8c4f2.a5986c","emptyMsgOnFail":false,"keepMsgProperties":false,"x":910,"y":200,"wires":[[],[]]},{"id":"c2849643.087188","type":"function","z":"38944507.17537a","name":"Mesures","func":"msg.payload = [\n msg.temp,\n msg.tempotemp,\n msg.hygro,\n msg.tempohygro,\n msg.batt,\n msg.tempobatt\n ];\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":755,"y":200,"wires":[["3d20214d.7ad45e"]],"l":false},{"id":"3b4321a1.80920e","type":"function","z":"38944507.17537a","name":"Date","func":"msg.payload = [\n msg.ym,\n msg.dh,\n msg.ms\n ];\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":755,"y":260,"wires":[["7b839008.ea96c"]],"l":false},{"id":"7b839008.ea96c","type":"modbus-write","z":"38944507.17537a","name":"Ecriture date & heure","showStatusActivities":false,"showErrors":false,"unitid":"1","dataType":"MHoldingRegisters","adr":"6","quantity":"3","server":"3aa8c4f2.a5986c","emptyMsgOnFail":false,"keepMsgProperties":false,"x":920,"y":260,"wires":[[],[]]},{"id":"3aa8c4f2.a5986c","type":"modbus-client","name":"Address 1","clienttype":"tcp","bufferCommands":true,"stateLogEnabled":false,"queueLogEnabled":false,"tcpHost":"127.0.0.1","tcpPort":"502","tcpType":"DEFAULT","serialPort":"/dev/ttyUSB","serialType":"RTU-BUFFERD","serialBaudrate":"9600","serialDatabits":"8","serialStopbits":"1","serialParity":"none","serialConnectionDelay":"100","unit_id":"1","commandDelay":"1","clientTimeout":"1000","reconnectOnTimeout":true,"reconnectTimeout":"2000","parallelUnitIdsAllowed":true}]
What did you expect to happen?
No response
Other Information
No response
Hi @simonR35, please give the Modbus Flex nodes a try to control all parameters to read or write from flexible inputs or Unit-IDs.
I can confirm this, just grab the example flow Multiple-Dynamic-FunctionCodes.json
At first it seems to have different values in each unit id.. but that is just because it is updating so fast, slow the injects down to 5 second intervals and you see you in fact have exactly the same values for each unitid....
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