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Date: 8-4-2010
Revision: 0
Form: 2396
validates all password entry attempts with the
boiler, but doesn’t conduct the validation itself.
The boiler has sole responsibility to accept a
password entry.
The display gets information from each boiler
about the access level settings for the status
and configuration parameters.
The installer and OEM passwords can be
changed in the boiler after logging in with the
current password. When the password is
changed at the S7999B1026 it is saved in the
R7910 and effective for all future logins.
NOTE:
Each boiler in a multi-boiler configuration has its
own set of installer and OEM passwords. To
avoid user confusion the passwords should be
changed to the same setting in all the boilers,
but there is no requirement to do so.
2.2.8 CHANGE PARAMETER SETTINGS
Figure 17 Change Parameter Dialog
Change parameter settings by selecting the
parameter on the page. A dialog box displays
for the parameter with controls allowing the user
to change the value (Figure 17).
After changing the setting to a new value, press
the OK button. Pressing the Cancel button
leaves the parameter unchanged.
The changed setting is reflected on the screen
and sent to the boiler when the OK button is
pressed.
There are two classes of parameters.
Non-Safety: Non-safety parameters can be
changed without placing the boiler in a
dangerous state. These parameters typically do
not require a password to modify.
Safety: Safety parameters can be viewed the
same way non-safety parameters can be
viewed. If the user makes no attempt to change
a safety parameter, the user isn’t required to
enter safety verification mode.
Safety parameters are grouped into blocks that
include only safety parameters, not a mixture of
safety data and non-safety data. All parameters
within the safety group undergo a verification
process, (see paragraph 2.2.9 Safety
Verification). A safety parameter group is
identified on the display to indicate when the
configuration parameters are safety-related.
2.2.9 SAFETY VERIFICATION
► ► CONFIGURE ►VERIFY
Figure 18 Safety Parameter Verification
For safety configuration parameters, safety
verification is required to commit the changes.
All safety configuration parameters in the group
should have the same access level. If this
condition isn’t so, the user is asked to enter
another password when a higher access level is
needed.
Each safety parameter group is verified one at a
time until all have been verified (Figure 18).
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