B.9 Power System Time, Frequency and Phase Monitor
137
.
Period, decimal point
thm
Tenths, hundredths and thousandths of seconds
F
ASCII F, indicates the start of Frequency Deviation Field
s
Sign cha (2Bh) frequency above nominal or
- (2Dh) frequency below nominal
U
Units of Hertz (Frequency Deviation)
.
Period, decimal point
thm
Tenths, hundredths and thousandths of Hertz
<
CR
><
LF
>
Carriage-return, line-feed characters (0Dh, 0Ah)
Set Measured System Deviation
Command:
(-)s.fsRD
(-)s.fsRD sets the system deviation.
Response:
<
CR
><
LF
>
Where:
s = 0 to
±
2000 seconds
fs = fractional seconds
Set Phase Calibration
Command:
p:kPC
p:kPC sets the phase calibration offset. Phase offset is stored in protected RAM.
Response:
<
CR
><
LF
>
Where:
p = Phase Offset in degrees
k = Security Key (e.g. 1201)
Set Voltage Amplitude Correction
Command:
v:kRV
v:kRV sets the system voltage amplitude correction.
Response:
<
CR
><
LF
>
Where:
v = Voltage correction per unit with 1.000 000 equal to no correction.
k = Security Key (e.g. 1201)
Return Time, Frequency, Phase Deviation with UTC Time
Command:
nPD
nPD returns the System Time, Frequency and Phase Deviation with a UTC time reference, at each
issuance of the command.
Response:
(when n = 0) mm/dd/yyyy hh:mm:ssU ss +f.fff +t.tttt ppp.ppp vvv.vv
<
CR
><
LF
>
(when n = 1) mm/dd/yyyy hh:mm:ssL ss +f.fff +t.tttt ppp.ppp vvv.vv
<
CR
><
LF
>
Where:
mm/dd/yyyy
= Date