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 t0 to t2: 1 s to 255 s, accuracy 1 s.
Recommended range for timeout t3: 1 s to 48 h, resolution 1 s.
Long timeouts for t3 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 (215–1) 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
t0
30 s
Time-out of connection establishment
N/A
t1
15 s
Time-out of send or test APDUs
15 s
t2
10 s
Time-out for acknowledges in case of no data
messages t2 < t1
10 s
t3
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
Summary of Contents for F650
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