Yokogawa AXFA14G/C - Manual (Page 65)

IM 01E20C02-01E 6-36
6. PARAMETER DESCRIPTION
6.5.2 Alarm Selection
The display and output differs depending on the alarm
levels. Certain types of alarm may or may not be
recognized as alarms, according to the settings of
certain parameters. The parameters that are relevant to
this function as follows.
[F20: DO Function] Setting of the function for the
DO status output terminal
[F21: DIO Function] Setting of the function for the
DIO status input/output terminal
[F22: DO Active Mode] Setting of the active mode
for DO terminal
[F23: DIO Active Mode] Setting of the active mode
for DIO terminal
[G21: 4-20mA Alarm Out] Setting of the current
output during an alarm occurring.
[G30: Alm-Setting] Alarm recognition of “Setting
Alarm”
[G31: Alm-Sig Over] Alarm recognition of “Signal
Overflow Alarm”
[G32: Alm-Emp Pipe] Alarm recognition of “Empty
Pipe alarm”
[G33: Alm-HH/LL] Alarm recognition of “HH/LL
Alarm” (Refer to the descriptions of G12 and G13 for
more details regarding HH and LL alarms.)
[G34: Alm-Adhesion] Alarm recognition of “Adhe-
sion Alarm”
[G41: Alm Record1] Alarm record1
[G43: Alm Record2] Alarm record2
[G45: Alm Record3] Alarm record3
[G47: Alm Record4] Alarm record4
(1) Display and output condition for system alarms
T0646.EPS
Alarm description
Alarm
output
4-20 mA
output
Totali-
zation Pulse
Display unit
Alarm
record
Normal Normal Normal Normal Display Mode No
Closed
(On)
␮P Fault
EEPROM Fault
A/D(H) Fault
A/D(L) Fault
A/D(Z) Fault
Coil Open
EEPROM Dflt
Microprocessor(CPU)failure
EEPROM failure
A/D converter failure
Flowtube coil is open-circuit
EEPROM default values
Open
(Off)
Fixed
(G21 selection)
Stopped Stopped Recorded
Alarm Mode
(display of system
alarm message)
Open
(Off)
0mA or
25mA
Stopped Indetermination
10
11
12
13
14
15
16
Note: • Alarm is output only when F20: DO Function or F21: DIO Function is set to “Alarm Output.”
• The operation when “Open (Off) Act” is set for F22: DO Active Mode, or “Open/Open Act“ is set for
F23: DIO Active Mode is shown in above table.
• 4-20mA output upon the occurrence of an alarm will be fixed at the value selected with G21: 4-20mA
Alarm Out.
*The output value is performed in accordance with the setting of the burnout switch. For information about
this switch, see Section 10.2.1.
Indeter-
mination Indeter-
mination
(*)
(2) Display and output condition for process alarms
Alarm
description
Selection
(parameter
number)
Alarm
output
4-20 mA
output
Totali-
zation Pulse
output
Display
unit
Alarm
record
30
31
32
33
Sig Overflow
Empty Pipe
HH/LL Alm
Adhesion Alm
Input signal error
Flowtube is not
filled with fluid
HH/LL Alarm
Electrode
adhesion alarm
T0647.EPS
Alarm Mode
(Message)
Alarm Mode
(Message)
Alarm Mode
(Message)
Alarm Mode
(Message)
Display Mode
Display Mode
Display Mode
Display Mode
Fixed
Continu-
ous (*)
Continu-
ous (*)
Continu-
ous (*)
Fixed
Fixed
Stopped
Continu-
ous (*)
Continu-
ous (*)
Continu-
ous (*)
Stopped
Stopped
Stopped
Continu-
ous (*)
Continu-
ous (*)
Continu-
ous (*)
Stopped
Normal
operation
Normal
operation
Normal
operation
Stopped
Recorded
No
Recorded
No
No
Recorded
No
Open
(Off)
Closed
(On)
Open
(Off)
Closed
(On)
Open
(Off)
Closed
(On)
Open
(Off)
Closed
(On)
YES
(G31)
NO
(G31)
YES
(G32)
NO
(G32)
YES
(G33)
NO
(G33)
YES
(G34)
NO
(G34)
Note: • Alarm is output only when F20: DO Function or F21: DIO Function is set to “Alarm Output.”
• The operation when “Open (Off) Act” is set for F22: DO Active Mode or “Open/Open Act“ is set for
F23: DIO Active Mode is shown in above table.
• 4-20mA output upon the occurrence of an alarm will be fixed at the value selected with G21: 4-20mA
Alarm Out.
*: Although outputs are continuous, output values are not guaranteed.