Moxa Technologies 331 User Manual download pdf (Page 32)

Moxa C Programmable RTU Controllers Managing the RTU Controllers

3-6

Adjusting the System Time

Setting the Time Manually

The Moxa C programming RTU controller has two time settings. One is the system time, and the other is the

RTC (Real Time Clock) time kept by the RTU controller’s hardware. Use the #date command to query the

current system time or set a new system time. Use #hwclock to query the current RTC time or set a new RTC

time.

Use the following command to query the system time:

#date

Use the following command to query the RTC time:

#hwclock

Use the following command to set the system time:

#date MMDDhhmmYYYY

MM = Month

DD = Date

hhmm = hour and minute

YYYY = Year

Use the following command to set the RTC time:

#hwclock –w

Write current system time to RTC.

The following figure illustrates how to update the system time and set the RTC time.

192.168.127.254 – PuTTY

root@Moxa:~# date

Fri Jun 23 23:30:31 CST 2000

root@Moxa:~# hwclock

Fri Jun 23 23:30:35 2000 -0.557748 seconds

root@Moxa:~# date 120910002010

Thu Dec 9 10:00:00 CST 2010

root@Moxa:~# hwclock –w

root@Moxa:~# date ; hwclock

Thu Dec 9 10:01:07 CST 2010

Thu Dec 9 10:01:08 2010 -0.933547 seconds

root@Moxa:~#

Updating the Time with NTP Client

The Moxa C programming RTU controller has a built-in NTP (Network Time Protocol) client that is used to

initialize a time request to a remote NTP server. Use #ntpdate <Time Server> to update the system time,

and save it to the RTC.

#ntpdate time.stdtime.gov.tw

#hwclock –w

Visit http://www.ntp.org

for more information about NTP and NTP server addresses.

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Moxa Technologies 331 User Manual Page 32