YOKOGAWA UP750, User Manual

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<Toc> <6. Parameters>
IM 05E01B02-41E 1st Edition : May 31,2000-00
List of Instrument Alarm Types
The table below shows the types and actions of instrument alarm. In the table, codes 1 to
10 are not provided with stand-by actions, while codes 11 to 20 are provided with stand-by
actions.
Alarm action Alarm action
Alarm type code Alarm type code
Alarm type
“Open/close” shows status of relay contact,
and “lit” and “unlit” shows status of lamp
Contact
closes
if alarm
occurs
Contact
opens
if alarm
occurs
Contact
closes
if alarm
occurs
Contact
opens
if alarm
occurs
Alarm type
No alarm OFF
PV high limit
PV low limit
Alarm setpoint
Closed (lit)
Hysteresis
PV
Open (unlit)
1
11
De-energized
on deviation low
limit alarm
Deviation
setpoint
Target SP
Open (lit)
Hysteresis
Closed
(unlit)
6
16
Closed (lit)
Hysteresis
Open (unlit)
Alarm setpoint PV
2
12
Deviation high
and low limits
Target SP
PV
Hysteresis Hysteresis
Deviation setpoint
Closed
(lit)
Open
(unlit)
Closed
(lit)
7
17
Deviation high
limit
Hysteresis
PV
Open (unlit)
Open (unlit)
Open (unlit)
Closed (lit)
Open (unlit)
Closed (lit)
Closed (lit)
Open (unlit)
Closed (lit)
Target SP
Deviation setpoint
Closed (lit)
3
13
Deviation within
high and low
limits
Deviation setpoint
Target SP
PV
Hysteresis Hysteresis
Open
(unlit)
Open
(unlit)
Closed
(lit)
8
18
Deviation low
limit
Target SP
PV
PV
Deviation setpoint
Open (unlit)
Hysteresis
Closed (lit)
4
14
De-energized on
PV high limit
De-energized on
PV low limit
PV
Open (lit)
Alarm setpoint
Hysteresis
Closed
(unlit)
9
19
De-energized on
deviation high
limit alarm
PV
Open (lit)
Target SP
Deviation
setpoint
Hysteresis
Closed
(unlit)
5
15
Alarm setpoint
Hysteresis
PV
Open (lit)
Closed
(unlit)
10
20
SP high
limit
SP low
limit
Alarm setpoint
Hysteresis
SP
28 Output high limit
Alarm setpoint Output value
Hysteresis
30
Hysteresis
Alarm setpoint SP
29 Output low limit
Hysteresis
Alarm setpoint Output value
31
“Open/close” shows status of relay contact,
and “lit” and “unlit” shows status of lamp
The following alarm types are used only for “Instrument Alarm.”
25: Sensor grounding alarm
26: Fault diagnosis output (Note 1)
27: FAIL output (Note 2)
Note 1: The fault diagnosis output turns on in case of input burnout, A/D converter failure, or reference junction compensation
(RJC) failure. For input burnout or A/D converter failure, the control output is set to the setpoint of the Preset Output
Value operating parameter (PO).
Note 2: The FAIL output is on during normal operation and turns off case failure.
Treated
as normal
⬚
C
Power-on
Time
The alarm output does not
turn on in this region even
if the PV value is below the
low limit of the alarm setpoint.
Low limit of
alarm setpoint
Normal Abnormal
The alarm
output turns on.
Stand-by Action