9365200990 Rev F
BE1-CDS240 Reporting and Alarm Functions
6-9
Table 6-4. Demand Settings for Current
Setting
Range
Increment
Unit of Measure
Default
Phase Interval (Minutes)
0 to 60
1
Minutes
15
Neutral Interval (Minutes)
0 to 60
1
Minutes
1
Neg.-Sequence Interval (Minutes)
0 to 60
1
Minutes
1
Calculation Method
Thermal (T), Block (B),
Sliding Block (S)
N/A N/A T
Demand Circuit
1 to 6
N/A
N/A
1, 2, 3, 4
The
Interval (Minutes)
for Phase Voltage, Watt, and Var demands are automatically determined by the
Interval (Minutes)
Phase setting on the
I Demand
tab (Figure 6-3). The
Interval (Minutes)
for Neutral
Voltage is automatically determined by the
Interval (Minutes) Neutral
setting on the
I Demand
tab (Figure
6-3).
Retrieving Demand Reporting Information
The values and time stamps in the demand registers are reported in primary amperes. They can be read
from both the HMI and the ASCII command interface.
The values and time stamps can be read from HMI menu Screen 4.4, \REPRT\DEMAND. The values in
the
Peak Since Reset
registers can be reset by pressing the
Reset
key. The value in the register will be
set to zero and then updated on the next processing loop with the currently calculated demand value. No
write access is required to do this from the HMI. It is also possible to preset a value into the
Peak Since
Reset
demand registers. This can be done by pressing the
Edit
key, changing the preset value using the
scrolling pushbutton keys, exiting and then saving the settings. Write access to the
Reports
functional
area is required to do this from the HMI.
The values and time stamps in the demand registers can also be read and reset or preset from the ASCII
command interface using the RD (report demands) command.
Overload and Unbalance Alarms Function
The programmable alarms function includes alarm points for monitoring phase demand thresholds for
overload alarms, and neutral and negative-sequence demand thresholds for unbalanced loading alarms.
Each time that the current demand register is updated, the value is compared to the appropriate demand
alarm threshold. If the threshold is exceeded, the alarm point is set. See
Alarms Function
in this section
for more information on how to use the programmable alarms reporting function.
The Phase, Neutral, and Neg.-Sequence current demand alarm thresholds can be set from the ASCII
command interface using the SA-DI command or BESTCOMS (Figure 6-3). The SA-DIG ASCII command
is used to set the ground demand alarm threshold, which can also be set with BESTCOMS (Figure 6-3).
The Voltage Max and Min Phase/Neutral thresholds are set with the SA-DV ASCII command or with
BESTCOMS (Figure 6-4). The Watt Positive and Negative demand thresholds are set with the SA-
DWATT ASCII command or with BESTCOMS (Figure 6-4). The SA-DVAR ASCII command is used to set
the Var Positive and Negative demand thresholds, which can also be set using BESTCOMS (Figure 6-4).
Alternately, HMI Screen \SETUP\DMD\ALARMS, can be used to set all demand alarms.
Summary of Contents for BE1-CDS240
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