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