Excel 800 LON Software Interface Description
69 EN1B-0375GE51 R0910
XFL(R)822 Analog Output Module
For the XFL822/XFLR822 Analog Output Module, the
L
ONMARK open-loop actuator object has been assigned per
output.
Each analog output object has its own configuration
properties, except for heartbeat configuration and
nciAoConfig, which will be shared among all objects.
Fig. 103 LONMARK analog output object
Receive Heartbeat
The default configuration for “Receive Heartbeat” is 300 sec.
If no nvi update is received during this time, the actuators
will go to their configured safety positions.
Start-up Behavior
At start-up, i.e., power-up or reset, all nvi's will be initialized
with INVALID, and after 1 minute, the actuators will go to
their configured safety positions.
Analog Output Control Level – nviAoValuePct[ ]
This network variable is used to drive the analog output to
0 … 100%.
If both nviAoSwitch[ ] and nviAoValuePct[ ] receive valid
values, nviAoValuePct[ ] will have priority.
Valid Ranges
Fig. 104 Analog output control levels – direct actuator
Fig. 105 Analog output control levels – reverse actuator
Default Value
nvoAoValuePct = INVALID = 0x7FFF (=163.835%)
This will cause the actuator to adopt a predefined position
defined for failure behavior.
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