BLOCK_ERR conditions (continued)Table 7-28:
Condition number Condition name and description
7 Input Failure/Process Variable has Bad Status: The parameter linking
to IN is indicating a Bad status.
8 Output Failure
9 Memory Failure
10 Lost Static Data
11 Lost NV Data
12 Readback Check Failed
13 Device Needs Maintenance Now
14 Power Up
15 Out of Service: The actual mode is out of service.
7.9.6 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.
7.9.7
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 above.
Process alarm detection is based on the OUT value. You can configure the alarm limits of
the following standard alarms:
Foundation Fieldbus
162 OCX 8800
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