Appendix C. ENIP-2: IEC 60870-5-101 and IEC 60870-5-104
ENIP-2, manual, ENIP.411187.002. Rev. 11.2020
79
5.
Application layer
Transmission mode for application data Mode 1 (least significant octet first), as defined
in 4.10 of IEC 60870-5-4, is used exclusively in this companion standard.
Common address of ASDU
(system-specific parameter, all configurations that are used are to be marked with an X).
IEC 60870-5-101
IEC 60870-5-104
One octet
Two octets
◼
One octet
◼
Two octets
Information object address
(system-specific parameter, all configurations that are used are to be marked with an X).
IEC 60870-5-101
One octet
Structured
Two octets
Unstructured
Three octets
IEC 60870-5-104
◼
One octet
Structured
◼
Two octets
Unstructured
Three octets
Cause of transmission
(system-specific parameter, all configurations that are used are to be marked with an X).
IEC 60870-5-101
One octet
Two octets (with originator address)
IEC 60870-5-104
◼
One octet
Two octets (with originator address)
Originator address is set to zero if not used
Selection of standard ASDUs
Process information in monitor direction
Type identification and cause of transmission assignments
((station-specific parameters).
IEC 60870-5-104
Type identification
Cause of transmission