D-3.5 Application Layer - GE PACSystems RX3i User Manual

Appendix D. Device Profile

D-3.5 Application layer

Transmission mode for application data
Mode 1 (Least significant octet first), as defined in clause 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 'X')
One octet
Information object address
(system-specific parameter, all configurations that are used are to be marked 'X')
One octet
Two octets
X
Three octets
Cause of transmission
(system-specific parameter, all configurations that are used are to be marked 'X')
One octet
Length of APDU
(system-specific parameter, specify the maximum length of the APDU per system)
The maximum length of APDU for both directions is 253. It is a fixed system parameter.
Maximum length of APDU per system in control direction
Maximum length of APDU per system in monitor direction
72
X
Two octets
X
Structured
X Unstructured
Two octets (with originator address)
X
Originator address is set to zero if not used
PACSystems RX3i Ethernet 104 Server Module User Manual GFK-2949C