Info Telegramma standard 1

[southofsanity]

Ciao a tutti, 

 

Devo pilotare un motore M-1PH8 con una CU250S, e molto che non uso il 300 con i drive siemens.

Pensavo di utilizzare il telegramma 1 e pilotarlo in velocita, se leggo e scrivo dirette le due word del telegramma

sulla prima c'è lo stato/comando sulla seconda il valore di velocità ?

 

grazie a tutti

[batta]

Puoi sicuramente fare così, gestendo i singoli bit della word di comando.
Io ti consiglierei di usare il telegramma 352, e SINA_SPEED_TLG352.
La funzione fa parte di librerie Siemens gratuite, è leggera, funziona bene, e ti permette anche di avere qualche parametro in più, sia in lettura che in scrittura, oltre allo stato e alla velocità.

 

[southofsanity]

Grazie mille della Info, ma la libreria SINA_SPEED non la trovo sullo step 7  ho scaricato vari esempi e con il tel 352 usano la FB283 SINA_FB con le UDT.

Dove posso trovarla?

 

[batta]

Scusa, mi era sfuggito che si parlava di S7-300.
Prova a cercare se esiste SINA_SPEED per S7-300.
In alternativa, puoi prendere spunto da SINA_SPEED o SINA_SPEED_TLG352 per S7-1200/1500, per crearti una funzione adatta al 300, per non partire completamente da zero.

[acquaman]

Dai un'occhiata qui, il blocco dovrebbe chiamarsi “PZD_G120_Tel_352“. 

[southofsanity]

Grazie, vedo cosa esce fuori  ,

un altra domanda tanto ci siamo, sulla parola di comando i primi tre bit sono OFF-1-2-3, dove l'1 e un impulso, ma nel manuale non specifica proprio bene la loro funzione.

se per esempio off 2 e 3 sempre attivi ,ovviamente in base alle condizioni di utilizo, e l'1 per lo start, io me li sono immaginati cosi.e corretto ?

[pigroplc]

17 minuti fa, southofsanity ha scritto:

off 2 e 3 sempre attivi ,ovviamente in base alle condizioni di utilizo, e l'1 per lo start, io me li sono immaginati cosi.e corretto ?

off 2 e 3 attivi se non vuoi fermare l'inverter, quando ricevi il pronto a partire metti a 1 off 1 , non impulso, fisso

[hameg]

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