Lenze Drive Server Bus server S7 getting started Instrukcja Użytkownika Pobierz pdf (Strona 52)

Busserv er S7

113Busserver S7 DE/EN 1.0

6.5.6 Parameter data access

The FB90 (FB DRIVE) enables accessing parameter data both via OPC and from the PLC. The

changeover between these two communication channels takes place automatically.

• One instanc e each of FB90 is to be called for each drive (DP Slave). In addition, one instance

data block for each drive is required for variables storage.

• Parameter data jobs via OPC are saved in DB OPC.

• Parameter data jobs from the PLC are sa ved in DB S7PAR.

FC4, network 2

L “StatusWord” //disconnected

L 0 //drive controllers

==I //are

SPB NEXT //skipped.

CALL FB 90 , DB100

Tag := //STRING

PB_Address :=B#16#9 //BYTE, B#16#x

EA_Address :=1000 //I-address, decimal

DriveServer_DB :=”DB-OPC-Server” //DBx; e.g. DB80

DrivePar_DB :=”S7-Parameter” //DBx; e.g. DB81

TimerNr :=”TimeOutTimer_OPC” //TIMER

TimeOut :=S5T#1S //TIME

Busy :=”BUSY” //OUT, BYTE

NEXT: NOP 0

• Use the StatusWord to check if the drive controller is switched on ( StatusWord <>0).Ifitis

not, the call of FB90 is skipped.

• In the above example, FB90 uses the instance data blo ck DB100 for variables storage.

• The input Tag is not assigned.

• The PROFIBUS device address and the start address of the parameter channel are indicated as

shown above.

• In the above example, both parameter da ta blocks (DB80, DB81)areused.

• The output byte Busy provides information about the communication status.

Tip!

Detailed information about the parameters of FB90 can be found in cha pter 6.3.1. (^ 100)

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Lenze Drive Server Bus server S7 getting started Instrukcja Użytkownika Strona 52