APPENDIX D: IEC 60870-5-104 PROTOCOL D.6 IEC 60870-5-104 INTEROPERABILITY
GEK-106310-AF F650 DIGITAL BAY CONTROLLER d-23
Acquisition of transmission delay
(station-specific parameter, mark "X" if function is only used in the standard direction, "R" if only used in the
reverse direction, and "B" if used in both directions).
Definition of time outs
Maximum range for timeouts t
0
to t
2
: 1 s to 255 s, accuracy 1 s.
Recommended range for timeout t
3
: 1 s to 48 h, resolution 1 s.
Long timeouts for t
3
may be needed in special cases where satellite links or dialup connections are used (for
instance to establish connection and collect values only once per day or week).
Maximum number of outstanding I format APDUs k and latest acknowledge APDUs (w)
Maximum range of values k: 1 to 32767 (2
15
–1) APDUs, accuracy 1 APDU
Maximum range of values w: 1 to 32767 APDUs, accuracy 1 APDU (Recommendation: w should not exceed two-
thirds of k).
Portnumber
Redundant connections
Acquisition of transmission delay
Parameter Default value Remarks Selected value
t
0
30 s Time-out of connection establishment N/A
t
1
15 s Time-out of send or test APDUs 15 s
t
2
10 s Time-out for acknowledges in case of no data
messages t
2
< t
1
10 s
t
3
20 s Time-out for sending test frames in case of a
long idle state
20 s
Parameter Default value Remarks Selected value
k 12 APDUs Maximum difference receive sequence number
to send state variable
12 APDUs
w 8 APDUs Latest acknowledge after receiving w I format
APDUs
8 APDUs
Parameter Value Remarks
Portnumber 2404 In all cases
Number N of redundancy group connections used
To Next Page
Loading...