Yokogawa EJA115 - Manual (Page 32)

IM 01C22T02-01E 6-1
6. IN-PROCESS OPERATION
6. IN-PROCESS OPERATION
This chapter describes the procedure performed when
changing the operation of the function block of the
EJA 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
6.2.1 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. If an LCD indicator is in-
stalled, the error number is displayed as AL.XX. If two
or more alarms are issued, multiple error numbers are
displayed in 2-second intervals.
F0601.EPS
Figure 6.1 Error Identification on Indicator
Table 6.1 List of Error Messages
LCD
AL.01
Content of Alarms
Capsule module failure.
AL.02 AMP module failure (1).
AL.03 AMP module failure (2).
AL.21 The resource block is in O/S mode.
AL.22 The transducer block is in O/S mode.
AL.23 AI1 function block is in O/S mode.
AL.41
AL.42
AL.43
AL.61 Out of the range of the built-in indicator
display.
AL.62 AIl function blocks are in Simulate mode.
AL.63 AI1 function block are in Man mode.
AL.64
T0601.EPS
AL.20 AI1 block is not scheduled.
The differential pressure is out of the
measurement range. An alarm is issued
when the differential pressure exceeds the
range of LRL–10%* to URL+10%*.
The static pressure is out of the range of the
maximum operating pressure. An alarm is
issued when the static pressure exceeds
110% of the maximum operating pressure.
Temperature is abnormal. An alarm is issued
when the temperature is out of the range of
–50 to 130
°
C.
Zero-point adjustment is abnormal. An alarm
is issued out of the range of LRL–10%* to
URL+10%*.
- - - - EJA is not participating in Fieldbus network.
* The value indicates % of URL.
6.2.2 Alarms and Events
The following alarms or events can be reported by the
EJA if Link object and VCR static entry are set.
Analog Alerts (Generated when a process value
exceeds threshold)
By AI1 Block Hi-Hi Alarm, Hi Alarm, Low
Alarm, Low-Low Alarm
By AI2 Block Hi-Hi Alarm, Hi Alarm, Low
Alarm, Low-Low Alarm
Discrets Alerts (Generated when an abnormal
condition is detected)
By Resource Block Block Alarm, Write Alarm
By Transducer Block Block Alarm
By AI1 Block
Block Alarm
By AI2 Block Block Alarm
By PID Block Block Alarm