ST_IEC870_5_101DataUnit_Ident
Identification field of data unit (ASDU).
TYPE ST_IEC870_5_101DataUnit_Ident:
STRUCT
eType : E_IEC870_5_101TcTypeID; (* TwinCAT ASDU type identifier *)
bSQ : BOOL; (* Single/Sequence *)
nObj : BYTE; (* Number of information objects or elements *)
bT : BOOL; (* Test bit *)
bPN : BOOL; (* Positive/Negative confirmation *)
eCOT : E_IEC870_5_101COTType; (* Cause of transmission *)
nORG : BYTE; (* Originator address (optional) *)
asduAddr: DWORD; (* Common address of ASDU *)
eClass : E_IEC870_5_101ClassType; (* Object class *)
END_STRUCT
END_TYPE
eType: Type.
bSQ: Sequence flag.
nObj: Number of information objects or information elements.
bT: Test flag
bPN: Positive/negative confirmation.
eCOT: Cause of transmission.
nORG: Source address.
asduAddr: Common ASDU address
eClass: Priority class.
Requirements
Development Environment | Target System | PLC libraries to include |
---|---|---|
TwinCAT v2.9.0 Build >= 1030 | PC or CX (x86) | TcIEC870_5_101.Lib ( Standard.Lib; TcBase.Lib; TcSystem.Lib; TcUtilities.Lib; are included automatically ) |
TwinCAT v2.10.0 Build >= 1301 | CX (ARM) |