18
58-640 PULSAR Model R96 Pulse Burst Radar Transmitter - F
OUNDATION
fieldbus
™
Instruction Manual
BLOCK_ERR_DESC
: Reports more specific details regard-
ing some errors reported through BLOCK_ERR.
The MODE_BLK parameter (within both the TB and AI
Blocks) must be set to AUTO to pass the PV Value through
the AI to the network.
Transducer scaling, called XD_SCALE is applied to the PV
from the CHANNEL to produce the FIELD_VAL in per-
cent.
• Valid XD_SCALE engineering units depend on the
Channel Type.
2.4.2 ai Block diagnostics
The AI blocks can display a BLOCK_ERR diagnostic
when:
1. The Channel is not set correctly.
2. XD_SCALE does not have suitable engineering units.
3. The SIMULATE parameter is active.
4. AI block MODE is O/S (out of service).
NOTE: This can be caused by the Resource Block being OOS or the AI
Block not scheduled for execution.
5. L-TYPE not set or set to Direct with improper
OUT_SCALE.
The AI block uses the STATUS_OPTS setting and the
“LIMIT” ALARM PARAMETERS value to modify the AI
PV and OUT QUALITY.
A Damping Filter is a feature of the AI block. The
PV_FTIME parameter is a time constant of a single expo-
nential filter for the PV, in seconds. This parameter can be
used to dampen out fluctuation in level due to excessive tur-
bulence.
The AI block also has multiple ALARM functions that
monitor the OUT parameter for out of bound conditions.
2.4.3 Local display of analog input
The PULSAR Model R96 FF transmitter incorporates a
useful feature that allows the Analog Input (AI) block Out
values to be displayed on the local LCD.
