Lenze PLC Designer PLC Designer (R3-1) Instrukcja Użytkownika Pobierz pdf (Strona 50)

L-force | PLC Designer

Lenze Specific Functions

48 DMS 4.1 EN 03/2011 TD29 

Example

FUNCTION_BLOCK L_IO1000_EPMS640_RS232Read

VAR_INPUT

xExecute: BOOL; (*Trigger request on positive edge / enable reading of data

from RS232 module*)

xReset: BOOL; (*Trigger reset / reset block*)

pbyInput_address: POINTER TO BYTE; (*Start address of input area in process

image*)

pbyOutput_address: POINTER TO BYTE; (*Start address of output area in process

image*)

pbyData_address: POINTER TO BYTE; (*Start address of data area to be

transferred*)

wNumber_of_IOBytes: WORD; (*Number of bytes available in process image 8/

20/ 60*)

END_VAR

VAR_OUTPUT

xDone: BOOL; (*Request completed without error, data sent STATUS parameter

= 00h*)

xBusy: BOOL; (*Information on processing status*)

xError: BOOL; (*Request completed with errors, STATUS parameter contains error

information*)

wStatus: WORD; (*Specification of the error if ERROR = 1 /information on

processing status, request is being processed 0x8181h*)

wLength_of_telegram: WORD; (*Number of bytes to be transferred. 1 <= LEN <=

1024*)

END_VAR

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Lenze PLC Designer PLC Designer (R3-1) Instrukcja Użytkownika Strona 50