CET Electric Technology
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T5 kvarh Export
T6 kvarh Export
T7 kvarh Export
T8 kvarh Export
kvarh Q1
kvarh Q2
kvarh Q3
kvarh Q4
Apparent Energy
kVAh
T1 kVAh
T2 kVAh
T3 kVAh
T4 kVAh
T5 kVAh
T6 kVAh
T7 kVAh
T8 kVAh
Table 4-11 Energy Measurements for each Monthly Energy Log Record
4.5.4 Daily and Monthly Freeze Log
The PMC-53A-E provides a Daily Freeze Log and a Monthly Freeze Log for Energy and Demand
parameters and can store up to 60 daily freeze records (2 months) and 36 monthly freeze records (3
years). All Freeze Logs and their respective setup registers can only be accessed through
communications. The PMC-53A-E’s Freeze Logs can freeze and record the following parameters:
Freeze Type
Parameters
Depth
Daily Freeze
kWh Total, kvarh Total, kVAh Total
Peak Demands for kW Total, kvar Total and kVA Total
60
Monthly Freeze
kWh Total, kvarh Total, kVAh Total
Peak Demands for kW Total, kvar Total and kVA Total with Timestamp
36
Table 4-12 Freeze Log
The Daily Self-Read Time setup parameter allows the user to specify the time of the day for the Daily
Freeze Log Self-Read operation, while the Monthly Self-Read Time setup parameter allows the user to
specify the time and day of the month for the Monthly Freeze Log Self-Read operation.
1)
Daily Freeze Self-Read Time can be set to a zero value or a non-zero value:
A zero value means that the Self-Read will take place at 00:00 everyday.
A non-zero value means that the Self-Read will take place at a specific time of the day based on
the formula: Self-Read time = (Hour x 100 + Min) where 0 ≤ Hour ≤ 23 and 0 ≤ Min ≤ 59. For
example, the value 1512 means that the Self-Read will take place at 15:12 of each day.
2)
Monthly Freeze Self-Read Time can be set to a zero value or a non-zero value:
A zero value means that the Self-Read will take place at 00:00 of the first day of each month.
A non-zero value means that the Self-Read will take place at a specific time and day based on
the formula: Monthly Self-Read Time = Day x 100 + Hour where 0 ≤ Hour ≤ 23 and 1 ≤ Day ≤ 28.
For example, the value 1512 means that the Self-Read will take place at 12:00pm on the 15th
day of each month.
4.5.5 SOE Log
The PMC-53A-E’s SOE Log can store up to 100 events such as Power-on, Power-off, Digital Input status
changes, Digital Output status changes, Setup changes and Setpoint events in its non-volatile memory.
Each event record includes the event classification, its relevant parameter values and a timestamp in
±
1
ms resolution. The SOE Log can be displayed on the Front Panel or Web Interface or retrieved via
communications for display. If there are more than 100 events, the newest event will replace the oldest
event on a First-In-First-Out basis. The SOE Log can be reset from the Front Panel or via communications.
4.5.6 Data Recorder (DR) Log
The PMC-53A-E provides five Data Recorders capable of recording a maximum of 16 parameters each
with a minimum interval of 60s. The Data Recorder Log is stored in the device’s non-volatile memory
and will not suffer any loss in the event of a power failure.
The PMC-53A-E’s 4MB log memory is divided equally into 5 buffers of 800kB each. By default, each DR
is allocated one 800kB buffer, which can hold a maximum ~118 days of recording with 16 parameters at
15-minute interval. This is equivalent to having a Recording Depth of ~11,377 data records (~118 days
x 24 hours per day x 4 data records per hour).
The Data Recorder can be configured to use more than one 800kB buffer if it’s required to maintain
recording for a longer period of time. For example, if the entire 4MB log memory is used for a single
Data Recorder, it can be configured to hold a maximum of 592 days (1.62 years) of recording with 16
parameters at 15-minute interval. This is equivalent to having a Recording Depth of 56,888 data records
