Lenze Drive Server Bus server S7 getting started Manual de usuario descargar pdf (Pagina 54)

Busserv er S7

115Busserver S7 DE/EN 1.0

6.5.8 Writing a parameter

FC4, network 4

UN “TriggerWrite”

= “TriggerWrite”

CALL FC 90 //data types

DrivePar_DB :=”S7-Parameter” //DB81

Count :=1 //decimal: 0-31

PB_Address :=”PB-Address” //B#16#9

R_W :=FALSE //FALSE or TRUE

Code :=”Code” //W#16#C, code 12

SubCode :=”Subcode” //B#16#0, Sub-code 0

W_Value :=”WriteValue” //DINT oder L#xxx

Status :=”WriteStatus” //OUT, BYTE, status byte

R_Value :=”WriteResult” //OUT, DINT, value

Trigger :=”TriggerWrite” //INOUT, BOOL

• The variable TriggerWrite is al ways set to TRUE.

Once a parameter write request has been processed correctly, TriggerWrite is automa tically

reset to FALSE.

• FC90 and parameter R_W = FALSE are called to transmit a write request for a drive parameter.

• Data exchange with FB DRIVE (FB90) takes place via the da ta block S7-Parameter (DB81).

• Input parameters are the request number, PROFIBUS address, write/read request, code and

sub-code and the actual value.

• Output parameters are the read value and the status byte.

• Set parameter R_W to TRUE to transmit a read request for a drive parameter.

Tip!

Detailed information about the parameters of FC90 can be found in cha pter 6.3.3. (^ 102)

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Lenze Drive Server Bus server S7 getting started Manual de usuario Pagina 54