GE 869 Communications Manual page 49

CHAPTER 6: IEC 60870-5-104
869 MOTOR PROTECTION SYSTEM – COMMUNICATIONS GUIDE
⊠ 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:
Parameter Default value Remarks
t
0
t 15 s
1
t 10 s
2
t 20 s
3
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):
Parameter Default value Remarks
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.
Port number:
Timeout of connection establishment
Timeout of send or test APDUs
Timeout for acknowledgements in case of no
data messages t < t
2 1
Timeout for sending test frames in case of a
long idle state
Maximum difference receive sequence number
to send state variable
Latest acknowledge after receiving w I-format
APDUs
15
– 1) APDUs, accuracy 1 APDU.
INTEROPERABILITY
Selected value
N/A
15 s
10 s
20 s
Selected value
12 APDUs
8 APDUs
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