SATEC PM174 Manual - Manual (Page 71)

Chapter 4 PAS
Application Software General Meter Setup
Series PM174 Powermeters 71
Parameter Options Default Description
DST start month
DST start week
DST start weekday Month-week-
weekday
Week = 1
st , 2 nd , 3 rd ,
4 th or Last (last week
of the month)
First
Sunday in
April The date when Daylight Savings Time
begins. The DST switch point is
specified by the month, week of the
month and weekday. By default, DST
starts at 2:00 AM on the first Sunday
in April of each year.
DST end month
DST end week
DST end weekday Month-week-
weekday
Week = 1
st , 2 nd , 3 rd ,
4 th or Last (last week
of the month)
Last
Sunday in
October
The date when Daylight Savings Time
ends. The DST switch point is
specified by the month, week of the
month and weekday. By default, DST
ends at 2:00 AM on the last Sunday
in October of each year.
Time
synchronization
input None
DI1
DI2 None The external port receiving the time
synchronization pulses
Daylight Savings Time
When the daylight savings time is enabled, the meter
automatically adjusts the device clock at 02.00 AM when
daylight savings time begins/ends. The default daylight
savings time change points are preset for the U.S.A.
If the daylight savings time option is disabled, you need to
manually adjust the device clock for daylight savings time.
Time Synchronization Pulses
External time synchronization pulses can be delivered through
one of the digital inputs. If a digital input is selected as the time
synchronization source, the edge of an external pulse adjusts
the device clock at the nearest whole minute. The time
accuracy could be affected by the debounce time of the digital
input, and by the operation delay of the external relay.
Using Digital Inputs
The meter is provided with two digital inputs that can trigger
the alarm/control setpoints to give an alarm on input status
change, or can be linked to the energy/TOU registers to count
pulses from external watt meters, or gas and water meters.
To configure them in your device, select the device site from
the list box on the PAS toolbar, select General Setup from the
Meter Setup menu, and then click on the Digital Inputs tab.