Honeywell Experion PKS User Manual page 217

Scenario Prerequisites
Inactivating a • PIOMB and CM1 are
PIOMB active.
• CEE is in the Run state.
• C300 and PGM are
communicating.
Inactivating a • PIOMB and CM1 are
CM containing active.
the
• CEE is in the Run state.
PROFIBUS
• C300 and PGM are
I/O Channel
communicating.
Block
Changing the • PIOMB and CM1 are
state of the active.
CEE
• CEE is in the Run state.
containing the
• C300 and PGM are
PIOMB to
communicating.
"Idle"
Deleting a • PIOMB is inactive.
PIOMB
• CM1 is active.
• CEE is in the Run state.
• C300 and PGM are
communicating.
Deleting a CM • PIOMB and CM1 are
containing the active.
PROFIBUS
• CEE is in the Run state.
I/O Channel
• C300 and PGM are
Block
communicating.
Loading a • CM1 is active.
PIOMB
• CEE is in the Run state.
• C300 and PGM are
communicating.
9 PROFIBUS I/O MODULE (PIOMB) FUNCTION BLOCK
Input type PIOMB
• Input process data is set to
fail-safe values.
• Strategies react to the fail-
safe values.
• PGM continues its
operations and publishes
data to the C300.
• Channel data is set to fail-
safe values.
• PGM continues its
operations and publishes
data to the C300.
• Channel data is set to fail-
safe values.
• PGM continues its
operations and publishes
data to the C300.
• Strategies are not affected
because the PIOMB has
already been inactivated.
• PIOMB closes its PDA
connection with the PGM.
• PGM stops publishing data
to the C300 from the
associated PDC.
• Channel is deleted when the
CM is deleted.
• No changes to the strategies,
the C300 to PGM
connection, or the PIOMB
functions occur.
• Channel data is set to fail-
safe values.
• Strategies react to the fail-
safe values.
• Connection to PGM is open
and input values begin to be
imaged from the PGM to the
C300.
Output type PIOMB
• Channel blocks request upstream
blocks to go into initialization.
• Upstream Regulatory Control block
realizes it is connected to an I/O
Channel and goes into initialize
manual state.
• PGM output to PROFIBUS slave
devices hold their last values.
• Channel data is displayed as "NaN"
or "0" and channel status is
displayed as "Bad."
• Actual output values and channel
status are available on the DSB.
• Control loop stops executing and
calculating new values.
• AOC.OP holds its last value.
• PIOMB output for that channel
holds its last value.
• PGM output and PROFIBUS slave
device for that point hold their last
value.
• Control loop stops executing and
calculating new values.
• AOC.OP holds its last value.
• PIOMB output for that channel
holds its last value.
• PGM output and PROFIBUS slave
device for that point hold their last
value.
• Strategies are not affected because
the PIOMB has already been
inactivated.
• PIOMB closes its PDA connection
with the PGM.
• Output of PROFIBUS slave device
goes unpowered as defined by the
DSB.
• Channel is deleted when the CM is
deleted.
• Last output values are held.
• Channel blocks request upstream
blocks to go into initialization.
• Upstream Regulatory block realizes
it is connected to an I/O Channel
and goes into initialize manual
state.
• No output value for any channel is
sent to the PGM.
• Output of PROFIBUS slave device
holds last output.
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