CHAPTER 6: IEC 60870-5-104 INTEROPERABILITY
869 MOTOR PROTECTION SYSTEM – COMMUNICATIONS GUIDE 6-9
⊠ Counter freeze without reset.
⊠ Counter freeze with reset.
⊠ Counter reset.
⊠ General request counter.
⊠ Request counter group 1.
⊠ Request counter group 2.
⊠ Request counter group 3.
⊠ Request counter group 4.
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 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.
Definition of timeouts:
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.
Port number:
Parameter Default value Remarks Selected value
t
0
Timeout of connection establishment N/A
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
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