Circutor computer SMART III-Fast Series Manuale Utente Scaricare il pdf (Pagina 70)

4�10�1� MODBUS CONTROL FRAME

TheComputer SMART III FASTcontrolstheCPC3iboardsusingtheMODBUSprotocol�

Inparticular,itsendsaframeevery200ms,usingFunction 15:Nbitswrite�

Themessageisa"broadcast"message,i�e�,itwillbereadbyallboards,inanyaddress�

Theformatoftheframeisasfollows:

Address

Func-

tion

Direction

of 1st bit

No� of bits

No� of

bytes

Bits value CRC

00 0F 0064 0040 08 DD0 to DD7 XXXX

Address: 00,Broadcast,alltheCPC3iboardsreceivealltheframes�

Function: 0F,Writefunction�

Direction of 1st bit: 0064,thedirectionofthe1stbitintheCPC3iboardis0x0064�

No� of bits: 0040,theframehas64bits�

No� of bytes: 08,groupedinto8byes�

Bits value: Themeaningofthe8bytesisdetailedinTable 39�

CRC: XXXX,CRCcharacter�

Table 39: Meaning of the 8 bytes, DD0 - DD7�

Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

DD0 - thy3_np2 thy2_np2 thy1_np2 - thy3_np1 thy2_np1 thy1_np1

DD1 - thy3_np4 thy2_np4 thy1_np4 - thy3_np3 thy2_np3 thy1_np3

DD2 - thy3_np6 thy2_np6 thy1_np6 - thy3_np5 thy2_np5 thy1_np5

DD3 - thy3_np8 thy2_np8 thy1_np8 - thy3_np7 thy2_np7 thy1_np7

DD4 - thy3_np10 thy2_np10 thy1_np10 - thy3_np9 thy2_np9 thy1_np9

DD5 - thy3_np12 thy2_np12 thy1_np12 - thy3_np11 thy2_np11 thy1_np11

DD6 - thy3_np14 thy2_np14 thy1_np14 - thy3_np13 thy2_np13 thy1_np13

DD7 - thy3_np16 thy2_np16 thy1_np16 - thy3_np15 thy2_np15 thy1_np15

thyn_npxmeansthyristornoftheblockorperipheralx(Thisnumberofperipheral,x,isthe

oneprogrammedintherotatingselectorforeachboard)�

NB:Theframeasksforthetransmissionofdatatothyristorsinupto16differentsteps,phase

byphase�TheComputer Smart III FASTregulatorhasamaximumof12outputs,soitdoes

notusethelast4stepsoftheframe�

Computer SMART III FAST

Instruction Manual

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Circutor computer SMART III-Fast Series Manuale Utente Pagina 70