SATEC PM180 Operation Manual - Manual (Page 24)

‎Chapter 2 Device Description Monitoring
22 PM180 Substation Automation Unit
The energy pulse LEDs are used for testing device accuracy by the external control
equipment through pulse readers. In order not to affect the energy accumulators, the
device should be put into the Energy Test Mode where the energy accumulators are
disconnected from the power sources. Energy Test Mode also prevents erroneous
setpoint operation and recording faults and power quality events when the test volts
and currents are applied to the device. For information on entering the Energy Test
Mode, see
Device Mode Control in Chapter 11 and Device Options Menu in Chapter
3.
Summary Energy Registers
The PM180 provides 16 summary (totalization) energy registers and 16 parallel
demand registers that can be linked to any internal energy source, or to any external
pulse source that delivers energy pulses through the device digital inputs (see
Chapter 9
Totalization Energy and TOU Registers ).
Each summary register can be configured to accumulate energies from multiple
sources using arithmetic addition and subtraction. A summary register is allowed to
be linked to another summary register to provide more comprehensive energy
calculations.
Time-of-Use
The PM180 TOU system handle a 10-year calendar with up to 16 types of days and
up to eight tariff changes per day in each daily profile.
The device provides 16 TOU energy and 16 parallel maximum demand registers that
receive data from the corresponding summary registers. Each TOU energy and TOU
maximum demand register stores the accumulated energy and corresponding peak
demands for up to 16 tariffs. See Chapter 9 “
Totalization Energy and TOU Registers ”
for information on how to configure the TOU registers and define the tariff scheme in
your device.
The device allows automatic daily and monthly profiling of the TOU energy readings
and TOU maximum demands to the data log files. Data log files #15 and #16 are
dedicated to the TOU system profile log and can be configured to automatically
record TOU daily and monthly profiles (see
Configuring Data Log Files in Chapter 8).
Monitoring
Substation Battery
The substation battery is normally connected to the DC voltage input terminals to
provide battery voltage measurements. Refer to the PM180
“Installation Manual” for
wiring diagrams.
See
VDC Input above for information on metering and monitoring DC voltage in your
device.
Memory Backup Battery
The hardware circuit monitors the status of the memory backup battery. When the
battery level drops below the minimum allowed threshold, the red MEM.BAT.LOW
LED on the front of the device is lit up, indicating that the battery should be replaced.
Power Supply
The status of the two power supply units is indicated on the front of the device by two
green LEDs: MAIN POWER and BACKUP Aux. POWER. The LEDs are lit up when
the supply voltage is present on the device terminals.
Logical Controller
The embedded logical controller allows monitoring any measured quantity or external
contacts to provide indication, counting and recording events when the monitored
value exceeds the predefined threshold or when status transitions are detected on
the device inputs. See
Using Control Setpoints in Chapter 7 for information on
programming the logical controller.