KROHNE MFC 300 FOUNDATION FIELDBUS EN - Manual (Page 43)

OPERATION
4
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MFC 300
www.krohne.com 02/2013 - 4001086702 - AD MFC 300 FF R02 en
4.8 Proportional Integral Derivative Block (PID)
The following tables list the PID Block parameters in alphabetical order.
The following tables contain short parameter description, factory settings (Initial Value (IV)) and
possible settings.
Parameter Parameter Parameter Parameter
DD name Access Description and settings Initial Value
ALERT_KEY ALERT_KEY ALERT_KEY ALERT_KEY
Alert Key Alert Key Alert Key Alert Key
R/W The identification number of the plant unit. This information
may be used in the host for sorting alarms, etc.
1
Setting:
1...255
BLOCK_ERR BLOCK_ERR BLOCK_ERR BLOCK_ERR
Block Error Block Error Block Error Block Error
R This parameter reflects the error status associated with the
hardware or software components associated with a block. It
is a bit string, so that multiple errors may be shown.
Current Block
Error
Setting:
• Other: Non-specific error active
• Block Configuration: Error detected in block configuration
• Simulation Active: Simulation enabled in this block
• Local Override: Output tracking of faultstate active
• Device Fault State: Device faultstate set
• Device Maintenance: Device needs maintenance soon
• Input Failure: Process variable has bad status
• Output Failure: Failure detected in output hardware
• Memory Failure: Memory error detected
• Lost Static Data: Static parameters cannot be recovered
• Lost NV Data: Non-volatile parameters cannot be recovered
• Readback Check: Failure detected in READBACK
• Maintenance Needed: Device NEEDS maintenance NOW
• Power Up: Recovery from power failure
• Out Of Service: Block actual mode is out of service
MODE_BLK MODE_BLK MODE_BLK MODE_BLK
Block Mode Block Mode Block Mode Block Mode
Mix The actual, target, permitted and normal modes of the block. -
TARGET
Target
R/W This is the mode requested by the operator. Only one mode
from those allowed by the permitted mode parameter may be
requested.
OOS
Setting:
ROut / RCas / Cas / Auto / Man / OOS
ACTUAL
Actual
R This is the current mode of the block, which may differ from
the target based on operating conditions. Its value is
calculated as part of block execution.
Actual mode
Setting:
ROut / RCas / Cas / Auto / Man / OOS
PERMITTED
Permitted
R/W Defines the modes which are allowed for an instance of the
block. The permitted mode is configured based on application
requirement.
ROut, RCas, Cas,
Auto, Man or OOS
Setting:
ROut / RCas / Cas / Auto / Man / OOS
NORMAL
Normal
R/W This is the mode the block should be set to during normal
operating conditions.
Auto
Setting:
Auto