Lenze Drive Server Bus server S7 getting started Manuale Utente Scaricare il pdf (Pagina 58)

Busserv er S7

119Busserver S7 DE/EN 1.0

6.6.5 Process data transfer

FC3, network 1

The following call is used to transmit two process data words (2PZD).

• Process data word 1 is always the DRIVECOM control word.

• Process da ta word 2 can be freely selected.

CALL FC 94

FirstDriveDW :=8

DriveSend_DB :=”DriveSend_DB”

DriveRecv_DB :=”DriveRecv_DB”

Enable :=”Enable”

QSP :=”QSP”

Reset :=”Reset”

Setpoint1 :=”Setpoint1”

ControlWord :=”ControlWord”

RDY :=”RDY”

TRIP :=”TRIP”

ActualValue1 :=”ActualValue1”

StatusWord :=”StatusWord”

• The parameter FirstDriveDW defines the byte position of the first data word of the connected

drive controller.

– For each drive controller, 8 data words are reser ved in the data blocks DriveSend_DB and /

or DriveRecv_DB. The first 4 data words are needed for parameter access and the last 4

data words for process data access.

– The drive controllers must have successive I/O addresses.

• The inputs Enable, QSP and Reset are set to enable the controller:

– Enable =TRUE

– QSP = FALSE

– Reset = FALSE

• The second process data word is assigned to the setpoint input.

• Control word and sta tus word conform to the DRIVECOM spec ification.

• The DRIVECOM status machine has already been implemented in FC94.

• The outputs RDY and TRI P provide information about the controller status.

• ActualValue1 is the value read out.

Tip!

Detailed information about the parameters of FC94 can be found in cha pter 6.3.7. (^ 107)

Use function block FC93 to transmit three process data words. (^ 106)

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Lenze Drive Server Bus server S7 getting started Manuale Utente Pagina 58