Honeywell Experion PKS, Руководство пользователя

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User-defined value Description
0 - 100 • For AO channels, numeric initialization value defines
percentage value of the output.
– If you define the initial value as 0, the AO channel
initializes to 0.
– If you define a nonzero value as the initialization value,
the AO channel initializes the output value using the
range defined by the low and the high range of the
channel.
Attention
If you want the output to be initialized to a low range,
you must enter a small non-zero value like 0.001 as
the initialization value. This enables the channel
value to initialize to the low range defined for the
channel. This difference is meaningful if an AO
channel is in 4-20 mA current loop.
• For DO channels, initialization value 0 defines OFF state of
the channel and value 1 defines ON state of the channel.
NaN If the initial value is defined as NaN, the output channels (AO
and DO) hold the last output value.
0 If the initial value is defined as 0, the AO channel initializes to
the low range defined for the channel and the DO channel is
cleared to 0 during all error scenarios.
Output channel behavior in various scenarios
The following table summarizes the behavior of AO and DO channels in various scenarios in R410.2 and later
and R410.1 or earlier.
Scenario Impact on AO/DO channel value in
Experion R410.2 and later Impact on AO/DO channel value in
Experion R410.1 or earlier
DSB is loaded for the first time. Clears to zero. Clears to zero.
DSB is reloaded. Drives values provided by the controller
for the connected PDCs. Drives values provided by the controller
for the connected PDCs.
FTE connection break between
controller and PGM. • Holds the last value if the DSB is
configured to hold the last output
value.
• If the DSB is not configured to hold
the last output value, channel values
are initialized from the user-defined
values.
• Holds the last value if the DSB is
configured to hold the last output
value.
• If the DSB is not configured to hold
the last output value, channel values
clear to zero.
Extended diagnostics report channel
failure. Clears to zero. Clears to zero.
Extended diagnostics report Module
failure. Clears to zero. Clears to zero.
An extended diagnostic overflow
condition exists but the DSB is not
configured to ignore extended
diagnostics overflow (the
Ignore
Extended Diagnostic Overflow
check box is not selected).
Clears to zero. Clears to zero.
Standard diagnostics report Station
Not Existent error.
The channel values are initialized from
the user-defined values. Clears to zero.
7 DEVICE SUPPORT BLOCK (DSB)
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