YOKOGAWA JUXTA VJQ7, User Manual, Page: 5 / 6

6. DESCRIPTION OF ALARM ACTIONS
This chapter describes examples of alarm actions under the
following conditions.
Item Alarm 1 Alarm 2
Parameter Setpoint Parameter Setpoint
Direction of alarm
action
E05: ALM1 ACTION High-limit
alarm
E06: ALM2 ACTION Low-limit
alarm
Alarm setting E03: SET POINT1 80% E04 : SET POINT2 15%
Hysteresis E09: HYSTERESIS1 10% E10 : HYSTERESIS2 5%
Alarm ON delay E11: ON DELAY1 1 sec E12 : ON DELAY2 3 sec
Alarm OFF delay E13: OFF DELAY1 2 sec E14 : OFF DELAY2 4 sec
Description of
alarm actions
The alarm is output if the
condition where the input value
is 80% or more of high-limit
alarm continues for 1 second
or more.
After the alarm is output, when
the condition where the input
value is less than 70% of
high-limit alarm continues for
2 seconds or more, the status
returns to normal.
The alarm is output if the
condition where the input value
is 15% or less of low-limit
alarm continues for 3 seconds
or more.
After the alarm is output, when
the condition where the input
value is more than 20% of
low-limit alarm continues for
4 seconds or more, the status
returns to normal.
Figure 6.1
Alarm-1 action
Alarm-2 action
Normal
Normal
Normal Normal
Alarm
Alarm
[%]
0
20
15
40
60
80
100
1 sec. 2 sec.
3 sec.
4 sec.
Alarm-2 hysteresis (5%)
Alarm-1 hysteresis (10%)
Alarm-1 setpoint (80%)
Alarm-2 setpoint (15%)
Elapsed time 1 sec.
[1] [2]
[3] [4]
[1]: Alarm status does not continue for more than 1 second after
the alarm conditions are established at alarm-1.
[2]: Normal status does not continue for more than 2 seconds after
the normal conditions are established at alarm-1.
[3]: Alarm status does not continue for more than 3 seconds after
the alarm conditions are established at alarm-2.
[4]: Normal status does not continue for more than 4 seconds after
the normal conditions are established at alarm-2.
Alarm-1
ON delay
Alarm-2
ON delay
Alarm-2
OFF delay
Alarm-1
OFF delay
Alarm conditions
established
Alarm conditions
established
Normal conditions
established
Normal conditions established
High-limit alarm ON
Low-limit alarm ON
High-limit alarm OFF
Low-limit alarm OFF
7. LIST OF PARAMETERS
Parameter Display Item
MODEL Model
TAG NO Tag no.
SELF CHK Self-check result
A DISPLAY1 Display1
A01 INPUT1 Input value
A06 OUTPUT Output value
A15 ALM1 STATUS Alarm-1 status
A16 ALM2 STATUS Alarm-2 status
A54 STATUS Status (*1)
A56 REV NO Rev. no.
A58 MENU REV MENU REV
A60 SELF CHK Self-check result
B DISPLAY2 Display2
B01 INPUT1 Input value
B06 OUTPUT Output value
B15 ALM1 STATUS Alarm-1 status
B16 ALM2 STATUS Alarm-2 status
B60 SELF CHK Self-check result
D SET (I/O) Setting (I/O) (*2)
D01 TAG NO.1 Tag no. 1
D02 TAG NO.2 Tag no. 2
D03 COMMENT1 Comment 1
D04 COMMENT2 Comment 2
D12 INP TYPE Input type
D13 IN RESIST Input resistance
D20 UNIT Output Range Unit
D24 INPUT1 L_RNG Input1 low range
D25 INPUT1 H_RNG Input1 high range
D30 OUT L_RNG Output low range
D31 OUT H_RNG Output high range
D44 LOW CUT Output low cut point
D55 PULSE TYPE Pulse width type
D56 PULSE WIDTH Pulse width time
D57 S/W FILTER Software Filter
D59 NMRR Frequency setting
(*3)
D60 SELF CHK Self-check result
E SET(ALM) Setting (alarm output)
(*2)
E03 SET POINT1 Alarm-1 setting
E04 SET POINT2 Alarm-2 setting
E05 ALM1 ACTION Direction of alarm-1 action
E06 ALM2 ACTION Direction of alarm-2 action
E09 HYSTERESIS1 Alarm-1 hysteresis
E10 HYSTERESIS2 Alarm-2 hysteresis
E11 ON DELAY1 Alarm-1 ON delay setting
E12 ON DELAY2 Alarm-2 ON delay setting
E13 OFF DELAY1 Alarm-1 OFF delay setting
E14 OFF DELAY2 Alarm-2 OFF delay setting
E15 RL1 ACTION Direction of alarm-1 relay
action
E16 RL2 ACTION Direction of alarm-2 relay
action
E60 SELF CHK Self-check result
F SET(COM) Setting (communication)
(*2)
F01 PROTOCOL Communication protocol
F02 ADDRESS Address
F03 BAUD RATE Baud rate
F04 PARITY Parity
F05 DATA LEN Data Length
F06 STOP BIT Stop bit
F07 INPUT DEC PT Decimal point position of
input
F60 SELF CHK Self-check result
P ADJUST Adjustment
P04 IN1 ZERO ADJ1 Zero adjustment of input
P04 IN1 SPAN ADJ1 Span adjustment of input
P40 RESISTOR ADJ Adjustment of external input
resistance
P60 SELF CHK Self-check result
Q TEST Test
(*2)
Q10 ALM1 TEST Forced output (alarm 1)
Q11 ALM2 TEST Forced output (alarm 2)
Q30 OUT TEST Forced output (Pulse)
Q60 SELF CHK Self-check result
*1 The Status is displayed for service personnel to see
history records.
*2 There are items not displayed depending on what output-2
is specified.
*3 The parameters are the items to be set at the factory.
5
IM 77J01Q17-01E 6th Edition