COM port function block
COM Port Open
FUNCTION_BLOCK FB_COMPORTOPEN
VAR_INPUT
bOpen :BOOL;
stComConfig :ST_COMCONFIG;
VAR_OUTPUT
bBusy :BOOL;
bErr :BOOL;
iErrId :WORD;
iHandle :WORD;
Legend
bBusy: The function block is active as long it is TRUE.
bErr: Error bit.
iErrId: Error number.
iHandle: pointer transfer.
|
Return parameter iErrId |
Meaning |
|---|---|
|
0 |
No error |
|
-1, 0xFFFF |
Incorrect COM port |
|
-2, 0xFFFE |
Incorrect or unsupported baud rate. Check the parameter stComConfig.BaudRate. |
|
-3, 0xFFFD |
Incorrect data format. Check the parameter stComConfig. |
|
-4, 0xFFFC |
Incorrect initialization of the COM interface |
|
-5, 0xFFFB |
Unsupported instance |
|
-6, 0xFFFA |
Incorrect size of the RX buffer |
|
-7, 0xFFF9 |
Incorrect size of the TX buffer |
|
-8, 0xFFF8 |
COM port is blocked |
COM Port Close
FUNCTION_BLOCK FB_COMPORTCLOSE
VAR_INPUT
bOpen :BOOL;
iHandle :WORD;
Legend
bClose: rising edge starts the function block
iHandle: pointer transfer of FB_COMPORTOPEN.
VAR_OUTPUT
bBusy :BOOL;
bErr :BOOL;
iErrId :WORD;
Legend
bBusy: The function block is active as long it is TRUE.
bErr: Error bit.
iErrId: Error number.
|
Return parameter iErrId |
Meaning |
|---|---|
|
0 |
No error |
|
> 0 |
error number (#not documented#) |