Rockwell Automation 1400-SP PowerMonitor Software - Manual (Page 53)

Chapter 5
Powermonitor Data Display and Configuration
5–15
k. SNAPSHOT PERIOD. Each Powermonitor provides a
SNAPSHOT log, allowing the device to store Average Volts,
Average Amps, kW, kVAR, kW Demand, Amp/kVA Demand,
Power Factor, Auxiliary Voltage Input, Frequency, kWH, kVARH,
and kWH Reverse readings at user defined intervals ranging from
1 sec. to 400 days. Position the cursor onto each of the four fields
provided and enter the desired total interval value.
l. DEMAND PERIOD and NUMBER OF DEMAND PERIODS.
The Powermonitor uses a “sliding window method” to calculate
kW Demand and Amps Demand. Both the DEMAND PERIOD (1
to 99 minutes) and NUMBER OF DEMAND PERIODS to be
averaged (1 to 15) are user programmable. This allows for
matching virtually any utility demand measurement method. Refer
to Publication 1400–800, ‘‘Bulletin 1400 Powermonitor Installation
and Operation Manual,” for additional information.
RELAY SETUP PARAMETERS. These parameters determine the
operation of the on–board relays.
m. RELAY MODE. This parameter is used only by the
Powermonitor to set the function of each relay. Each of the three
relays may be used for SETPOINT, kWH PULSE or kVAH PULSE
functions.
!
ATTENTION: When enabling the kWH and/or kVARH pulse
outputs, first check the device’s setpoint configuration to ensure
there will be no conflicts between the setpoint and pulse output
relay assignments.
n. RELAY # VALUE. The purpose of this parameter depends on the
relay mode set.
If the relay mode is SETPOINT, this parameter sets the duration of
the pulse output by the relay when the setpoint assigned to that
relay becomes active. Range of values is 1 to 65535 seconds. A
value of 0 will set the relay to latched operation, which provides a
transition rather than a pulse output.
If the relay mode is kWH or kVARH PULSE, this parameter sets
the number of kWH or kVARH between pulses. This is the
number of kW Hours or kVAR hours that must accumulate before a
pulse is generated on the indicated device relay. Range of values is
1 to 65535. A value of zero will disable the pulses.
Save & Exit
The Powermonitor will be reconfigured using the new values entered into the
screen when the operator presses the <Esc> key to return to the MAIN
MENU. The <Esc> key, in this case, is used as a SAVE & EXIT command.