Areva MiCOM P921, Technical Manual, Page: 192 / 376

P92x/EN CT/E11 Technical Guide
Modbus Protocol
Page 2/118 MiCOM P921-P922-P923
1.7.5 Page 3 : Protective functions - Remote settings for group 2 . 30
1.7.5.1 Undervoltage protection (P922 and P923) 30
1.7.5.2 Overvoltage protection (P922 and P923) 31
1.7.5.3 Zero sequence overvoltage protection (P922 and P923) 31
1.7.5.4 Negative sequence overvoltage protection (P922 and P923) 32
1.7.5.5 Positive sequence undervoltage protection (P922 and P923) 33
1.7.5.6 Under/overfrequency protection (P922 and P923) 34
1.7.5.7 Rate of change of frequency ( Only MiCOM P923) 35
1.7.6 Page 4 : Remote commands 35
1.7.7 Pages 5 and 6 : reserved 35
1.7.8 Page 7 : Self tests results of the relay MiCOM 35
1.7.9 Page 8 : Time synchronisation 36
1.7.10 Page 9 to 21h : Disturbance records data (25 pages) (MiCOM P922 and P923 only)37
1.7.11 Page 22h : Disturbance record index frame (MiCOM P922 and P923 only)
39
1.7.12 Page 35h : Events record (MiCOM P922 and P923 only) 39
1.7.13 Page 36h : Oldest event data (MiCOM P922 and P923 only) 39
1.7.14 Page 37h : 5 last fault records data (MiCOM P922 and P923 only) 40
1.7.15 Pages 38h to 3Ch : Selection of the disturbance record and channel (MiCOM P922
and P923 only) 40
1.7.16 Page 3Dh : Number of disturbance records available (MiCOM P922 and P923 only)41
1.7.17 Page 3Eh : Oldest fault record data (MiCOM P922 and P923 only).
41
1.7.18 Page 40h: Status Frame of Frequency Disturbance Record (MiCOM P923 only). 41
1.7.19 Page 41h: selection of Frequency Disturbance Record and channel (MiCOM P923
only). 42
1.7.20 Pages 42h to 49h : Datas of Frequency Disturbance Record (MiCOM P923 only). 42
1.7.21 Page 4Ah: Frequency Disturbance Record Frame index and acknowledgment
(MiCOM P923 only). 43
1.8 Description of the mapping format 44
1.9 Specific formats for the records files (P922 and P923 only) 57
1.10 Specific formats for the frequency disturbance records files (P923 only) 65
2. K-BUS PROTOCOL AND COURIER LANGUAGE 69
2.1 K-BUS 69
2.1.1 K-Bus Transmission Layer 69
2.1.2 K-Bus Connection 69
2.1.3 Auxiliary equipment 70
2.2 Relay Courier Database 70
2.2.1 Main Reference Cells 70
2.2.2 List of events generated by the relay MiCOM P922 and P923 71