YOKOGAWA FLEXA SENCOM FLXA202 - In-Process Operation; Mode Transition; Generation of Alarm

<6. In-process operation>
6-1
IM 12A01A02-71E 3rd Edition : Mar. 23, 2018-00
6. In-process operation
This chapter describes the procedure performed when changing the operation of the function
block of the FLXA21 in process.
6.1 Mode Transition
When the function block mode is changed to Out_Of_Service, the function block pauses and a
block alarm is issued.
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.
Note that no parameter status can be changed.
6.2 Generation of Alarm
n Indication of Alarm
When the self-diagnostics function indicates that a device is faulty, an alarm (device alarm) is
issued from the resource block. When an error (block error) is detected in each function block or
an error in the process value (process alarm) is detected, an alarm is issued from each block.
For details of ALARM, refer to Section 8.1.
10.38
Tag:FLXA21–PH
TEXT_PH1
19
25.0
mV
4mA 20mAPH1
°C
pH
OR
Figure6.1 ErrorIdenticationonIndicator
n Alarms and Events
The following alarms or events can be reported by the FLXA21 if Link object and VCR static entry
are set.
Analog Alerts
(Generated when a process value exceeds threshold)
By AI1, AI2, AI3 Block Hi-Hi Alarm, Hi Alarm, Low Alarm, Low-Low Alarm
Discrete Alerts
(Generated when an abnormal condition is detected)
By Resource Block Block Alarm, Write Alarm
By Sensor Transducer Block Block Alarm
By AI1, AI2, AI3 Blocks Block Alarm