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node drivers

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v2.0.2

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controladores de nodo

Un enfoque en capas para los controladores de protocolo.

Instalar

npm install node-drivers

Ejemplos

Leer y enumerar etiquetas de un procesador Logix5000:

 const { TCP , CIP } = require ( 'node-drivers' ) ;

const tcpLayer = new TCP ( '1.2.3.4' ) ;
const logix5000 = new CIP . Logix5000 ( tcpLayer ) ;

console . log ( await logix5000 . readTag ( 'tagname' ) ) ;

/** Read an element from a 1-dimensional tag */
console . log ( await logix5000 . readTag ( 'TagThatIs1DArray[0]' ) ) ;

/** Read an entire 1-dimensional tag */
console . log ( await logix5000 . readTag ( 'TagThatIs1DArray' ) ) ;

/** Read the first 4 elements of a 1-dimensional tag */
console . log ( await logix5000 . readTag ( 'TagThatIs1DArray' , 4 ) )

/**
 * Read a slice of a 1-dimensional tag
 * example returns an array containing the values of elements 3 through 7
 */
console . log ( await logix5000 . readTag ( 'TagThatIs1DArray[3]' , 5 ) ) ;

/** Read an element of a structure member of a tag */
console . log ( await logix5000 . readTag ( 'tag.member[0].anothermember' ) ) ;

/**
 * Read all tags scoped to a program
 * returns an object containing all of the scoped tags
 */
console . log ( await logix5000 . readTag ( 'TheProgramName' ) ) ;

/** Read a program scoped tag */
console . log ( await logix5000 . readTag ( 'TheProgramName.tag' ) ) ;

/**
 * Read a tag using the symbol instance id
 * (available in controller version 21 and above)
 */
console . log ( await logix5000 . readTag ( 2130 ) ) ;

/** List all global tags */
for await ( const tag of logix5000 . listTags ( ) ) {
  console . log ( tag ) ;
}

/** List all tags scoped to a program */
for await ( const tag of logix5000 . listTags ( 'Program:Alarms' ) ) {
  console . log ( tag ) ;
}

await tcpLayer . close ( ) ;

Lea/escriba una etiqueta desde un procesador PLC-5, SLC 5/03 o SLC 5/04 utilizando PCCC integrado en CIP:

 const { TCP , CIP , PCCC } = require ( 'node-drivers' ) ;

const tcpLayer = new TCP ( '1.2.3.4' ) ;
const cipLayer = new CIP ( tcpLayer ) ;
const pccc = new PCCC ( cipLayer ) ;

/** Write an integer */
console . log ( await pccc . typedWrite ( 'N10:47' , 1000 ) ) ;

/** Read an integer */
console . log ( await pccc . typedRead ( 'N10:47' ) ) ;

/** Write a float */
console . log ( await pccc . typedWrite ( 'F8:1' , 5.5 ) ) ;

await tcpLayer . close ( ) ;

Encuentre todos los dispositivos EtherNet/IP en una subred usando la dirección de transmisión UDP o haciendo ping explícitamente a cada host:

 const { UDP , CIP } = require ( 'node-drivers' ) ;

const udpLayer = new UDP ( '1.2.3.255' ) ;
const eipLayer = new CIP . EIP ( udpLayer ) ;

/** Broadcast */
console . log ( await eipLayer . listIdentity ( ) ) ;


/** Explicitly */
const hosts = [ ] ;
for ( let i = 1 ; i < 255 ; i ++ ) {
  hosts . push ( `1.2.3. ${ i } ` ) ;
}

/* hosts overrides whatever host was specified in the Layers.UDP() constructor */
console . log ( await eipLayer . listIdentity ( { hosts } ) ) ;

await udpLayer . close ( ) ;

Recupere información de un dispositivo EtherNet/IP a través de TCP:

 const { TCP , CIP } = require ( 'node-drivers' ) ;

const tcpLayer = new TCP ( '1.2.3.4' ) ;
const eipLayer = new CIP . EIP ( tcpLayer ) ;

console . log ( await eipLayer . listInterfaces ( ) ) ;

console . log ( await eipLayer . listServices ( ) ) ;

/** no response, used to test underlying transport layer */
await eipLayer . nop ( ) ;

await tcpLayer . close ( ) ;

Comunicarse con un dispositivo Modbus a través de TCP:

 const { TCP , Modbus } = require ( 'node-drivers' ) ;

const tcpLayer = new TCP ( '1.2.3.4' ) ;
const modbusLayer = new Modbus ( tcpLayer ) ;

// read holding register 40004
console . log ( await modbusLayer . readHoldingRegisters ( 3 , 1 ) ) ;

await tcpLayer . close ( ) ;