Alpha-technologies PowerAgent SC3 Bedienungsanleitung PDF herunterladen (Seite 28)

PowerAgent

SC3 Site Controller Document # 700-000014-01 Rev 2

Installation and Operation

Phoenix Broadband Technologies, LLC 10/28/2010

Page 28 of 57

5.9.6 Time Server Configuration (6)

The Site Controller can set its internal clock from any internet time server that supports Network

Time Protocol (NTP). There are many such servers around the world. Many of these servers are

operated by government standards organizations. Most private networks also have time servers.

The Site Controller is shipped with the NTP configuration set to get the time from two different US

National Institute of Standards time servers. The IP addresses of these servers can be changed

in the NTP Configuration. If the time server addresses are not configured or the Site Controller is

unable to contact either time server the Site Controller will initialize the time to 00:00:00 1/1/2008.

If communications is not established with a time server the internal clock will run from this point.

The time provided by most time servers is Greenwich Mean Time (GMT). The Site Controller will

convert this to Local Time using a time offset that can be entered in the NTP Configuration.

To configure the NTP select

option 6 from the

Configuration Main Menu.

Enter the IP addresses as

described in the IP Address

section of this manual. There

are two Time Server addresses. The Site Controller will use the

primary server unless it fails to respond and then it will switch to

the secondary. It will not switch back unless the secondary

server fails to respond or the Site Controller is reset. To change a

default Time Server IP Address to undefined, enter zeros for the

IP address.

The Site Controller will reset itself if there is no communications

with either time server for approximately 2 hours. To disable the

reset function enter zero for all 4 octets of the primary time server

IP address. The Site Controller will use the secondary Time

Server to set the time if the second IP address valid.

The time read from the time server is GMT. There is an option in

the NTP Setup to enter a time offset to correct the time to read

local time. If the time offset is positive, east of the UK, simply

enter the offset in minutes. If the time offset is negative, west of

the UK, the offset must be entered in 2’s compliment form. To

compute the value subtract the time offset in minutes from 65536

and enter the result. For example the offset to Eastern Daylight

time is 4 hours. 65536 - 240 = 65296 Enter 65296 as the time

offset for Eastern Daylight time. The table to the left contains the

offset value for each major time zone.

To save the changes, type ”9” from the menu. The changes will

be saved in nonvolatile memory, the telnet session will be

terminated, and the Site Controller will reset.

Time Offset

from GMT

Time

Zone

Time

Offset

12 NZST

720

11 660

10 GST 600

9 JST 540

8 CCT 480

7 420

6 360

5.5 IST 330

5 300

4 240

3 BT 180

2 EET 120

1 CET 60

0 GMT 0

-1 WAT 65476

-2 AT 65416

-3 65356

-4 AST 65296

-5 EST 65236

-6 CST 65176

-7 MST 65116

-8 PST 65056

-9 YST 64996

-10 AHST

64936

-11 NT 64876

-12 IDLW 64816

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 56 57

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