5
INSTRUCTION BULLETIN—Reference Guide
CyTime
TM
Sequence of Events Recorder
IB-SER32e-02
Jan-2022
© 2010-2022 Cyber Sciences, Inc. All rights reserved.
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Description
Type
Range
Notes
(ID = 1)
TIME DATA, ACTUAL (CONT.)
400230
PTP Clock Class
integer
0 to 255
00 = Not Applicable
06 = Normal (PTP Timescale)
07 = Holdover (PTP)
13 = Normal (UTC Timescale)
14 = Holdover (UTC)
52 = Out-of-spec (PTP)
58 = Out-of-spec (UTC)
255 = Slave-only
400231
PTP Clock Accuracy
integer
0 to 254
00 (0x00) = Not Applicable
32 (0x20) = 25 ns
33 (0x21) = 100 ns
39 (0x27) = 100 µs
41 (0x29) = 1 ms
43 (0x2B) = 10 ms
45 (0x2D) = 100 ms
47 (0x2F) = 1s
49 (0x31) = >10s
254 (0xFE) = unknown
400232
PTP Clock Source (PTP Time Source)
integer
0 to 255
00 (0x00) = Unknown
16 (0x10) = Atomic clock
32 (0x20) = GPS
64 (0x40) = PTP
80 (0x50) = NTP
96 (0x60) = Hand-set (manual)
144 (0x90) = Other
160 (0xA0) = Internal (none)
400233
reserved
400234
reserved
400235
reserved
400236
PTP communications model
integer
1 or 2
1 = Unicast
2 = Multicast
400237
PTP network transport protocol
integer
0, 1 or 2
0 = UDPv4
1 = UDPv6
2 = 802.3 (Layer 2)
400238
PTP operating mode
integer
1 or 2
2 = two-step
1 = one-step
400239
PTP path delay mechanism
integer
0, 1 or 2
0 = disabled
1 = End-to-End (E2E)
2 = Peer-to-Peer (P2P)
400240
PTP announce interval (master)
signed
integer
0 to 4 (1 to 16 sec.)
Default = 1 (2 sec.)
log-base2 of value in seconds
400241
PTP announce receipt time-out (master)
integer
2 to 10
Default = 3
multiple of announce interval
400242
PTP sync interval (master)
signed
integer
-1 to 1 (0.5 to 2 sec.)
Default = 0 (1 sec.)
log-base2 of value in seconds
400243
PTP delay request interval (master)
signed
integer
0 to 5 (1 to 32 sec.)
Default = 0 (1 sec.)
log-base2 of value in seconds
Please see Section 8 for more details on the convention used in IEEE 1588 to express interval settings in terms of log-base2.