Echelon LNS - Manual (Page 146)

LNS Programmer's Guide 132
Read the SelfTestResults property of a LonMarkObject to
perform a self-test on the LonMarkObject:
Dim MyObjectStatus as LcaObjectStatus
Set MyObjectStatus = LonMarkObject.SelfTestResults
Does the test complete?
If not, an exception will be thrown.
Follow these steps:
Poll the SelfTestInProgress
property until it returns False.
Read the FailSelfTest property to
determine why the self-test failed.
If yes, the self-test will return an
ObjectStatus object.
Examine the properties of the
ObjectStatus object to see the
results of the self-test. See the LNS
Object Server Reference help file for
more information on these propertes.
Figure 6.3 Performing a Self-Test on a LonMarkObject
NOTE: The LonMarkAlarm object supports alarming on devices that implement their
alarms through SNVT_alarm network variables, but not through the more recent
SNVT_alarm2 type. However, SNVT_alarm2 type network variables can be monitored
and controlled using the standard monitor and control techniques described in Chapter 9
of this document.
To receive meaningful results for the SelfTestResults and Status properties of the
LonMarkObject, the device must support these features. If the device does not comply
with version 3.0 or later of the LonMark Application-Layer Interoperability Guidelines,
then the
LonMarkObjects
and
ConfigProperties
collections will be empty for the
device, and the properties mentioned in this section will be inaccessible.
Some devices that comply with version 3.0 or later of the LonMark Application-Layer
Interoperability Guidelines may not support the self-test feature. Reading the
SelfTestResults property in this case will cause an exception to be thrown. You can
use the ReportMask property of the
LonMarkObject
object to determine whether a
device supports self-tests.
Replacing Devices
This section describes how to replace a device with a new device that contains the same
application image and external interface as the old one. Replacing a device in a
L ON W ORKS network is different than replacing a device in a hardwired system. You
cannot simply unplug the old device, and plug in a new one to take its place in a
L
ON W ORKS network. You must transfer the network image (network address and
connection membership) from the old device to the new device. If the old device contained