Endress+Hauser Proline Promass 83 - Alarm Detection and Processing; Limit Values

5 Analog Input function block Device Functions Proline Promass 83 FOUNDATION Fieldbus
186 Endress+Hauser
• Parameter group OUT_SCALE
The result is that with an input value of, for example, 15 kg/h a value of 50% is output via the
parameter OUT.
A0004766-en
Fig. 4 : Rescaling the input value (example)
5.2.9 Limit values
The limit values are based on the output value OUT. If the output value OUT exceeds or does not
reach the defined limit values then an alarm is sent to the fieldbus host system via the limit value
process alarms. The following limit values can be defined:
• HI_HI_LIM (upper alarm limit)
• HI_LIM (upper pre-warning limit)
• LO_LO_LIM (lower alarm limit)
• LO_LIM (lower pre-warning limit)
5.2.10 Alarm detection and processing
Process alarms provide information on particular block statuses and block events. The status of the
process alarms is communicated to the fieldbus host system via the parameter BLOCK_ALM. The
parameter ACK_OPTION specifies whether an alarm must be acknowledged via the fieldbus host
system.
The following process alarms are generated by the Analog Input function block:
Block process alarms
A block process alarm is triggered via the BLOCK_ERR parameter. The parameter BLOCK_ALM is
used to show the block process alarms and communicate them to the fieldbus host system. The
following process alarms can be generated by the Analog Input function block:
• SIMULATE ACTIVE
• INPUT FAILURE
•OUT OF SERVICE
• BLOCK CONFIG ERROR
If the option of the process alarm (BLOCK ALM) has not been enabled in the parameter
ACK_OPTION, the process alarms must be acknowledged in the parameter BLOCK_ALM.
OUT_SCALE 0 % = 0
OUT_SCALE 100 % = 100
OUT_SCALE UNIT = %
Esc
E
- +
OUT
50%
Transducer
Block
XD_SCALE OUT_SCALE
00
00
30
100
100%
%
Analog Input Function Block
%
100
Mass
Flow
kg/h
15 kg/h
0 to 30 kg/h