Areva MiCOM P921 - Page 247

Technical Guide P92x/EN CT/E11
Modbus Protocol
MiCOM P921-P922-P923 Page 57/118
1.9 Specific formats for the records files (P922 and P923 only)
CODE DESCRIPTION
F61 Conversion rules for the voltage values of the disturbance record
* In order to obtain the phase voltages values at the VT primary, apply the following
formula :
« Read value » x « VT primary value » / « VT secondary value » x
coe
f
2100
* In order to obtain the Vo value at the residual VT primary, apply the following formula :
« Read value » x « Residual VT primary value »/« Residual VT secondary value » x
coe
f
2100
where : coef = 12600 for the range (57-130V) and 3400 for the range (220-480V)
F62 Disturbance records data
1
st
word : Disturbance record number
2
nd
word : Disturbance recording end time (sec)
3
rd
word : Disturbance recording end time (sec)
4
th
word : Disturbance recording end time (ms)
5
th
word : Disturbance recording end time (ms)
6
th
word : Cause of the disturbance record trigging
1 : Relay n°1 operation (trip)
2 : Instantaneous information
3 : Remote trigger
4 : Trig order received through a logic input
7
th
word : Frequency at the beginning of the post time
F63 Events records data
1
st
word : Event type : refer to format F67
2
nd
word : Associated value type : refer to format F67
3
rd
word : Modbus address ( use of different version of VDEW )- refer to paragraph 1.5
4
th
word : Courier cell address ( use of different version of VDEW )- refer to paragraph
1.5
5
th
word : event occurrence date (second) : number of seconds since the 01/01/1994
6
th
word : event occurrence date (second) : number of seconds since the 01/01/1994
7
th
word : event occurrence date (ms)
8
th
word : event occurrence date (ms)
9
th
word : acknowledgement : (0 = non acknowledged event ; 1 = acknowledged
event)