Operation: CP1SD/T/L Version
CENTRON® Polyphase Meter Technical Reference Guide
55
The maximum number of pulses is 65,535; therefore, the smallest pulse weight (PW) that
can be used is:
0275
.
0
535
,
65
1800
min
=
=
Wh
PW
Since the pulse weight value must be a multiple of 0.01 in the meter, 0.03 Wh could be
programmed as the pulse weight (Ke) for the kWh channel in load profile in this example.
Data Storage
The D/T/L Register uses non-volatile flash memory to record load profile data. Data is
stored in load profile memory at the end of each interval. Each channel has 16 bits written to
load profile memory. For example, consider 8 channels of load profile. At the end of an
interval, a 16-bit number is written into load profile memory for channel 1; a 16-bit number
for channel 2 follows immediately; and so on, up to the last 16-bit number for channel 8,
which follows immediately.
The process continues for each interval until 128 intervals (one block or record) have been
recorded. In addition to the profile data, each interval contains eight types of status bits
written into each data interval.
1
Partial Interval
—The status bit is set for a partial interval due to a time adjust, power
outage, or beginning interval.
2
Long Interval
—The status bit is set for a long interval due to a time adjust backwards.
3
Skipped Interval
—The status bit is set for a skipped interval due to either a power
outage, Test Mode, or time adjusted forward during the interval.
4
Test Mode
—The status bit is set for Test Mode due to the meter being in test mode
during the interval.
5
DST
—The status bit is set for DST due to DST being in effect during the interval.
6
Power Outage
—The status bit is set for each interval during which a power outage
occurs (greater than the minimum time programmed in software).
7
Time Adjust Forward
—The status bit is set for time adjust forward during the
interval.
8
Time Adjust Backward
—The status bit is set for time adjust backward during the
interval.
Refer to the PC-PRO+ Advanced online help for a list of Load Profile Status Codes.
In addition to the interval profile data and the interval status data, each block contains a time
tag specifying the month, day, hour, and second of the end of the data block.
