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F
Fieldbus
™
OUNDATION
April 2023
Table 8-26: BLOCK_ERR Conditions
Condition
number
9
10
11
12
13
14
15
8.9.6
Modes
The PID function block supports the following modes:
•
Manual (Man): The block output (OUT) may be set manually.
•
Automatic (Auto): The SP may be set manually, and the block algorithm calculates OUT.
•
Cascade (Cas): The SP is calculated in another block and is provided to the PID block
through the CAS_IN connection.
•
RemoteCascade (RCas): The SP is provided by a host computer that writes to the
RCAS_IN parameter.
•
RemoteOutput (Rout): The OUT is provided by a host computer that writes to the
ROUT_IN parameter.
•
Local Override (LO): The track function is active. OUT is set by TRK_VAL. The BLOCK_ERR
parameter shows Out of service.
•
Initialization Manual (IMan): The output path is not complete (for example, the cascade-
to-slave path might not be open). In IMan mode, OUT tracks BKCAL_IN.
•
Out of Service (O/S): The block is not processed. The OUT status is set to Bad: Out of
Service. The BLOCK_ERR parameter shows Out of service.
You can configure the Man, Auto, Cas, and O/S modes as permitted modes for operator
entry.
8.9.7
Alarm detection
A block alarm is generated whenever the BLOCK_ERR has an error bit set.
The types of block errors for the AI block are defined in
Process alarm detection is based on the OUT value. You can configure the alarm limits of
the following standard alarms:
•
High (HI_LIM)
•
High high (HI_HI_LIM)
•
Low (LO_LIM)
•
Low low (LO_LO_LIM)
152
(continued)
Condition name and description
Memory Failure
Lost Static Data
Lost NV Data
Readback Check Failed
Device Needs Maintenance Now
Power Up
Out of Service: The actual mode is out of service.
00809-0500-4881
Block
errors.
Emerson.com/Rosemount
Manual
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