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CHAPTER 6: IEC 60870-5-104 COMMUNICATION INTEROPERABILITY DOCUMENT
UR FAMILY – COMMUNICATIONS GUIDE 6-9
6
Parameter loading
 Threshold value
 Smoothing factor
 Low limit for transmission of measured values
 High limit for transmission of measured values
Parameter activation
 Activation/deactivation of persistent cyclic or periodic transmission of the addressed object
Test procedure
 Test procedure
File transfer
File transfer in monitor direction:
 Transparent file
 Transmission of disturbance data of protection equipment
 Transmission of sequences of events
 Transmission of sequences of recorded analog values
File transfer in control direction:
 Transparent file
Background scan
 Background scan
Acquisition of transmission delay
 Acquisition of transmission delay
Definition of time outs
Maximum range of values for all time outs: 1 to 255 s, accuracy 1 s.
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.
Parameter Default value Remarks Selected value
t
0
30 s Timeout of connection establishment 120 s
t
1
15 s Timeout of send or test APDUs 15 s
t
2
10 s Timeout for acknowledgements in case of no data messages t
2
< t
1
10 s
t
3
20 s Timeout 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