Context value, bit to word. Bit is refreshed with value 0 but word keep with 1 value

General
1

Hi folks,

I've serched for something similar to my issue, but I have'nt found.
A dashboard button send value 1 if is pressed. After 5 seconds (delay), this bit is set to 0 again.

With function setbit, bit 0 of a word is set with the button value (0 or 1). Then this word is writted with Modbus FC06.

The problem is that bit returns to 0 after 5 secons of (value:1), but the word keeps in 1 value. I don't understand why.

See attached the code:

function setBit(number, bitPosition) {
    return number | (1 << bitPosition);
}

var xAuxPLCRentadorax0=global.get("AuxRentadora.b0");
var wAuxPLCRentadora=setBit(xAuxPLCRentadorax0,0);
global.set("AuxRentadoraWord", wAuxPLCRentadora);

Global vars values:

AuxRentadora{
b0:0,
Word:1}

AuxRentadoraWord: 1

Thanks in advance

2

It is not easy to understand exactly what the problem is.
Can you provide a simple flow illustrating the problem, that we can import and test?

3

Hi @Colin,

See attached the flow part affected.

[{"id":"63bf743b57d7dad3","type":"ui_button","z":"6f0f171f.39d858","name":"","group":"b2147235.818","order":7,"width":0,"height":0,"passthru":false,"label":"Reset Bomba","tooltip":"","color":"","bgcolor":"","icon":"","payload":"1","payloadType":"num","topic":"topic","topicType":"msg","x":320,"y":740,"wires":[["db50437ae9b45029"]]},{"id":"132dec09.2c9ce4","type":"modbus-flex-write","z":"6f0f171f.39d858","name":"","showStatusActivities":false,"showErrors":false,"server":"ca7a28d558d23b0a","emptyMsgOnFail":false,"keepMsgProperties":false,"x":870,"y":800,"wires":[["3be8578.b5476a8"],[]]},{"id":"3be8578.b5476a8","type":"debug","z":"6f0f171f.39d858","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":1110,"y":800,"wires":[]},{"id":"db50437ae9b45029","type":"change","z":"6f0f171f.39d858","name":"","rules":[{"t":"set","p":"AuxRentadora.b0","pt":"global","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":580,"y":740,"wires":[["bd5634d79c96b550"]]},{"id":"af960b1bccdb78b6","type":"function","z":"6f0f171f.39d858","name":"Bit a word AuxPLCRentadora","func":"function setBit(number, bitPosition) {\n    return number | (1 << bitPosition);\n}\n\nvar xAuxPLCRentadorax0, wAuxPLCRentadora,word;\nxAuxPLCRentadorax0=global.get(\"AuxRentadora.b0\");\nwAuxPLCRentadora=setBit(xAuxPLCRentadorax0,0);\n\n\nif (xAuxPLCRentadorax0==1){\n    word=1;\n    global.set(\"AuxRentadora.Word\", 1);\n}\nelse{\n    word=0;\n    global.set(\"AuxRentadora.Word\", 0);\n}\n\n\nmsg.payload = {\n    'value': word,\n    'fc': 6,\n    'unitid': 1,\n    'address': 114,\n    'quantity': 1\n}\nmsg.topic = \"WriteAuxRentadora\";\nreturn msg","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":580,"y":800,"wires":[["132dec09.2c9ce4"]]},{"id":"4e0d07c757ea0a46","type":"inject","z":"6f0f171f.39d858","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"1","crontab":"","once":false,"onceDelay":0.1,"topic":"","payloadType":"date","x":310,"y":800,"wires":[["af960b1bccdb78b6"]]},{"id":"bd5634d79c96b550","type":"delay","z":"6f0f171f.39d858","name":"","pauseType":"delay","timeout":"5","timeoutUnits":"seconds","rate":"1","nbRateUnits":"1","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":false,"allowrate":false,"x":800,"y":740,"wires":[["47305e8466ee811a"]]},{"id":"0b42e813ff1b2e31","type":"debug","z":"6f0f171f.39d858","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":1110,"y":740,"wires":[]},{"id":"47305e8466ee811a","type":"function","z":"6f0f171f.39d858","name":"Reset","func":"global.set(\"AuxRentadora.b0\", 0);\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":950,"y":740,"wires":[["0b42e813ff1b2e31"]]},{"id":"b2147235.818","type":"ui_group","name":"Consums","tab":"aecc735e.171a1","order":2,"disp":true,"width":"6","collapse":false},{"id":"ca7a28d558d23b0a","type":"modbus-client","name":"M241Rentadora","clienttype":"tcp","bufferCommands":true,"stateLogEnabled":false,"queueLogEnabled":false,"tcpHost":"10.10.5.31","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},{"id":"aecc735e.171a1","type":"ui_tab","name":"Consums","icon":"dashboard","order":3,"disabled":false,"hidden":false}]

Function "Bit a word AuxPLCRentadora" was different previously:

function setBit(number, bitPosition) {
    return number | (1 << bitPosition);
}

var xAuxPLCRentadorax0, wAuxPLCRentadora,word;
xAuxPLCRentadorax0=global.get("AuxRentadora.b0");
wAuxPLCRentadora=setBit(xAuxPLCRentadorax0,0);
global.set("wAuxPLCRentadora", wAuxPLCRentadora);

msg.payload = {
    'value': wAuxPLCRentadora,
    'fc': 6,
    'unitid': 1,
    'address': 114,
    'quantity': 1
}
msg.topic = "WriteAuxRentadora";
return msg

The problem is that in context variable, bit turns false but word keeps in 1 value.

Thanks in advance!

4

That isn't a simple flow that we can test, as it includes modbus nodes, which obviously won't work unless you have the device available.

[Edit] If you can configure inject node or nodes to inject sample data to show the problem then that would be ideal.

5

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