Moore Industries NET Concentrator System AOM, Руководство пользователя

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NET Concentrator System
®
NCS
- 28 -
Moore Industries-International, Inc.
www.miinet.com
User Accounts
To add, update or create user accounts you must
access the Security section of the Interface Module
web page. Ensure that security is in Closed
mode;
you cannot make changes to user accounts in Open
mode.
Adding an Account
To add a new account, click the Add Account
button.
At the next screen you will be asked to enter the
User Name, Password and then to verify the selected
password.
Next, select the
Permissions level of the
user–Administrator, Power User or Guest. When all
information is correct, click
Add.
Updating an Account
Click the button to the left of the account you wish to
update. Click the
Update Account
button. Select the
User Level
which you want to apply to the account.
Click
Update.
Deleting an Account
To delete an existing account, click the button to
the left of the account; click
Delete Account
. For
verification, at the next page you will be asked
whether to Cancel or Delete
the account. Click the
appropriate button.
Configuring System Time
The NCS Interface Module maintains a real time
clock (RTC). The time is stored in a battery backed
RTC chip which keep accurate time even when the
NCS is powered off. Data recorded in the Data
Logger is stamped with this time. ISaGRAF can also
read and make use of this time. If at power up, the
NCS determines the time stored in the RTC chip is not
valid, an error bit will be set.
The System Time web page displays the current
workstation time, and any errors related to the System
Time Subsystem.
There are three methods to set the clock:
- Use Workstation Time
- Manually Set Time
- Use Time Server
Use Workstation Time
When selected, the current workstation (i.e. the PC
viewing the web page) time is displayed in GMT. The
time zone offset is also displayed. When Update Time
is clicked, the clock in the NCS will be set to match the
workstation’s time.
Manually Set Time
This selection allows the time to be set to any arbitrary
value. The selection controls are pre-loaded with the
current workstation time and Time Zone offset.
Use Time Server
When selected, the “Enable Time Server” box can
be checked, and the IP address of the Time server
to be used set. When Update Time is clicked, the
NCS queries the server. If a successful query is
made, the time is jump set to match the returned time.
Thereafter as the time is returned from the server, a
technique called “time slewing” is used to slow down
or speed up the NCS’ clock in an effort to make it
match the time server.
Errors related to accessing the time server cause error
bits to be set in the System Time Substatus register
.