Table of Contents
Advertisement
TIME SYNCHRONIZATION STRATEGIES
Setting the D.20 RIO device time and date
To set the time and
date:
Creating administrator-level user accounts
To create a new
administrator-level
user account:
Time synchronization strategies
38
You can now configure the D.20 RIO using the D.20 RIO HMI over the network
connection. See Chapter 6, Using the D.20 RIO. You must create administrator-level
user accounts before you can access the D.20 RIO remotely through SSH.
1.
Connect to the rear maintenance RS-232 port. See "D.20 RIO field and network
connectors" on page 29.
2.
At the D20RIO#>> prompt, type d20riocfg and press Enter.
3.
Type 5 and press Enter to select 5. Configure Time Sync.
4.
Type 2 and press Enter to select 2. Set System Clock.
5.
Complete the on screen prompts as required to set the date and time.
Since you cannot use the root user account to access the D.20 RIO remotely, you must
create administrator-level user accounts for this purpose. This must be done for the first
time through the D.20 RIO's rear panel serial communications port.
1.
Connect to the rear maintenance RS-232 port. See "D.20 RIO field and network
connectors" on page 29.
2.
At the D20RIO#>> prompt, type d20riocfg and press Enter.
3.
Type 1 and press Enter to select 1. Configure Authentication.
4.
Type 5 and press Enter to select 5. Administrator Group Users.
5.
Complete the on screen prompts as required to create a new administrator-level user.
You may now use this user account to access the D.20 RIO remotely through SSH.
By default, the D.20 RIO is configured to restrict access to various command line services
like SSH to administrator-level users only. You can use the Configure Administrator Only
Logins setting under Secure Access to change this parameter and allow both
administrator- and supervisor-level access.
The D.20 RIO system time needs to be updated at a high frequency from a valid time
source, to keep it accurate. It is recommended to use a D400 as the SNTP source for a D.20
RIO with a fast SNTP poll frequency option (5 seconds). D.20 RIO system time accuracy is
defined as the time within the D400 and the D.20 RIO, with respect to the time input to the
D400. There are two options available for time synchronization to achieve better system
time accuracy.
•
IRIG-B option: A D400 is configured to accept an IRIG-B time sync input and a D.20 RIO
is configured for SNTP time sync with a D400.
1 ms system time accuracy can be achieved with this option. Performance test results
have shown 1 ms accuracy recorded for 99.6% of the total D.20 RIO points.
•
SNTP option: A D400 is configured to accept an SNTP time sync input and a D.20 RIO is
configured for SNTP time sync with a D400.
1 ms system time accuracy cannot be assured in this option. However higher time
accuracy can be achieved if a third-party SNTP to IRIG-B converter is used.
GE Information
CHAPTER 4: SETTING UP THE D.20 RIO
D.20 RIO - HARDWARE USER'S MANUAL
Advertisement
Table of Contents
