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Section 10
Appendix 2 IEC 60870-5-104 interoperability
92
Parameter
Default value
t
30 s
0
t
15 s
1
t
10 s
2
t
20 s
3
Maximum range for time-outs: 1 s to 255 s, accuracy 1 s.
Maximum number of outstanding I format APDUs k and latest acknowledge
APDUs (w)
Parameter
Default value
k
12 APDUs
w
8 APDUs
Maximum range of values k: 1 to 32767 (2
Maximum range of values w: 1 to 32767 APDUs, accuracy 1 APDU
(Recommendation: w should not exceed two-thirds of k).
Portnumber
Parameter
Portnumber
RFC 2200 suite
RFC 2200 is an official Internet Standard which describes the state of
standardization of protocols used in the Internet as determined by the Internet
Architecture Board (IAB). It offers a broad spectrum of actual standards used in the
Internet. The suitable selection of documents from RFC 2200 defined in this
standard for given projects has to be chosen by the user of this standard.
Remarks
Time-out of connection
establishment
Time-out of send or test
APDUs
Time-out for acknowledges
in case of no data messages
t
< t
2
1
Time-out for sending test
frames in case of a long idle
state
Remarks
Maximum difference receive
sequence number to send
state variable
Latest acknowledge after
receiving w I format APDUs
15
–1) APDUs, accuracy 1 APDU
Value
2406
1MRS757105 B
Selected value
Configurable
Configurable
Configurable
Configurable (up to 65535 s)
Selected value
Configurable
Configurable
Remarks
Configurable. The IEC-104
standard port is 2404 but in
Arctic this port is reserved for
IEC-101↔IEC-104 gateway
application by default. The Direct
I/O and Gateway applications
must have unique ports when
used simultaneously.
RER601/603
Technical Manual
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