Satec PM175 Manual User Manual Page 68

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Chapter 4 PAS Application Software
68
Series PM175 Powermeters
Parameter
Options
Default
Description
Country
Default, or country
name
Default
Defines calendar setting. The default
setting stands for the U.S.A.
Daylight savings
time
Disabled
Enabled
Enabled
When DST is disabled, the RTC
operates in standard time only. When
enabled, the device automatically
updates the time at 2:00 AM at the
pre-defined DST switch dates.
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
The daylight savings time option is enabled in the PM175 by
default, and the default daylight savings time change points
are preset for the U.S.A. When the daylight savings time is
enabled, the meter automatically adjusts the device clock at
02.00 AM when daylight savings time begins/ends.
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.
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