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9.
Metasys N2 Details
9.1
Node Addressing
ASD parameter
ASD Number
selects the Metasys N2 node address. Valid
addresses are 1 – 255.
NOTE
that the factory default value for
ASD Number
is
0
, and must therefore be changed to a valid N2 node address, or an
INVALID ADDRESS error indication will result.
9.2
Network Characteristics
No configuration is necessary. The network characteristics are predetermined
according to the Metasys N2 specification.
9.3
Object Summaries
The interface contains a predefined set of analog and binary I/O points used
for configuring, controlling and monitoring the drive. The interface supports
analog input, analog output, binary input and binary output object types.
•
Analog input
(AI) objects are used for monitoring analog status items. AI
objects support low alarm limits, low warning limits, high warning limits,
high alarm limits and differential values. Change of state (COS), alarm
and warning functions can also be enabled. An AI object will accept an
override command, but will not change its actual value or indicate override
active. Most AI objects are statically defined, but two are available for
user-configuration to access any available drive parameter.
•
Analog output
(AO) objects are used for setting and monitoring analog
control and configuration items. An AO value can be modified by issuing
an override command. Issuing a release command will not cause the AO
to automatically return to its pre-override value, nor will the AO
automatically return to its pre-override value after a certain time period of
no communication. Most AO objects are statically defined, but two are
available for user-configuration to access any available drive parameter.
•
Binary input
(BI) objects are used for monitoring discrete (digital) status
items. BI objects support COS, alarm enabling and normal/alarm status
indications. A BI object will accept an override command, but will not
change its actual value or indicate override active. All BI objects are
statically defined.
•
Binary output
(BO) points are used for setting and monitoring discrete
control and configuration items. A BO value can be modified by issuing an
override command. Issuing a release command will not cause the BO to
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