<5. In-Process Operation>
5-1
IM 12A01A02-72E
3rd Edition : Oct. 01, 2015-00
5.
In-Process Operation
This chapter describes the procedure performed when changing the operation of the function
block of the analyzer in process.
5.1
Mode Transition
When the function block mode is changed to Out_Of_Service, the function block pauses.
When the function block mode is changed to Manual, the function block suspends updating of
output values. In this case alone, it is possible to write a value to the OUT parameter of the block
for output.
5.2
Generation of Alarm
n
Indication of Alarm
When the self-diagnostics function indicates that a device is faulty, a diagnostic message
(DIAGNOSIS or DIAGNOSIS_EXTENSION) is issued from the physical block. When a
diagnostic message is detected in each function block or a diagnostic message in the process
value (process alarm) is detected, a diagnostic message is issued from each block.
For details of alarm, refer to “
10.38
Tag:FLXA21–PH
TEXT_PH1
19
25.0
mV
4mA
20mA
PH1
°C
pH
OR
Figure 5.1
Example of alarm
n
Status of Each Parameter in Failure Mode
Status has Classic Status and Condensed Status.
Classic Status is a conventional alarm and does not support the NAMUR NE107. Condensed
Status is an alarm which was added to PA Profile 3.01 or later and supports the NAMUR NE107.
The following standard categories of instrument diagnostics are defined for the NAMUR NE-107.
F (Failed):
An alarm category that indicates a failure has occurred in the instrument or in its peripheral
devices.
C (Check Function):
An alarm category that indicates that a detected failure is a temporary event.
S (Off Specification):
An alarm category that indicates that the detected failure was caused by the instrument
being used outside of its range or because a discrepancy has occurred between the set
value and measured value. The alarm was caused either by the instrument or process state.
