F_iecResetStream
From product version: TwinCAT PLC Library IEC60870-5-104 substation v2.0.6 and higher.
The function initialises ans resets the stream variable. As an option the internal data buffer of the stream variable can be initialised with a defined number of zero bytes. The return value of the function delivers the number of successfull initialised zero bytes.
FUNCTION F_iecResetStream: UDINT
VAR_INPUT
cbLength : UDINT; (* number of init data bytes *)
END_VAR
VAR_IN_OUT
stream : ST_IEC870_5_101Stream;
END_VAR
cbLength: Number of data bytes to be initialised.
stream: Variable to be initialized.
Example in ST:
After run the internal buffer odf the stream variable is reset and initialised with 5 zero bytes.
PROGRAM P_ResetStream
VAR
stream : ST_IEC870_5_101Stream;
bReset : BOOL := TRUE;
END_VAR
IF bReset THEN
bReset := FALSE;
F_iecResetStream( 5, stream );
END_IF
Memory description of stream variable after run:
length | data | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
5 | 16#00 | 16#00 | 16#00 | 16#00 | 16#00 | ... | ... | ... | ... | ... | ... | IEC870_MAX_ASDU_DATA_BYTE |
Requirements
Development Environment | Target System | PLC libraries to include |
|---|---|---|
TwinCAT v2.10.0 Build >= 1301 | PC or CX (x86) CX (ARM) | TcIEC870_5_101.Lib |