FUNCTION_BLOCK PB_CNCT
This function block can be used for establishing a DPV1 Class 2 connection to a PROFIBUS Slave. The connection is established and kept open if input REQ = TRUE, it's closed when REQ = FALSE. While the connection is in state open, the ID output has a value that can be used as ID input of RDREC or WRREC.
InOut:
|
Scope |
Name |
Type |
Initial |
Comment |
|
Input |
REQ |
BOOL |
Start Request |
|
|
MASTER |
BYTE |
Master ID |
||
|
SEGMENT |
BYTE |
Always set to 0. |
||
|
STATION |
BYTE |
Station address of the target |
||
|
SLOT |
BYTE |
Slot number of the target |
||
|
Output |
VALID |
BOOL |
Connection is valid |
|
|
ERROR |
BOOL |
Error detected |
||
|
BUSY |
BOOL |
FB is busy |
||
|
STATUS |
DWORD |
Last detected status |
||
|
ID |
DWORD |
CommFB.Constants.INVALID_ID |
Identifier of a PB Slave. Use for RDREC or WRREC (Class 2) |
