Yokogawa JUXTA VJS7 - Manual (Page 4)

4 IM 77J01S07-01E 5th Edition Mar. 02, 2012-00
5.3.4 Alarm ON Delay and Alarm OFF Delay
Set alarm-1 and alarm-2 ON delays in [E11: ON DELAY1] and
[E12: ON DELAY2] and then alarm-1 and alarm-2 OFF delays
in [E13: OFF DELAY1] and [E14: OFF DELAY2]. An alarm
ON delay is a delay time from the establishment of alarm
condition to alarm output; an alarm OFF delay is a delay time
from the establishment of return-to-normal condition to output.
• Setting range: 0 to 999 seconds
• Setting resolution: 1 second (Note that about 0.2 second will
be added to set time to prevent erroneous operation.)
For example, when an alarm ON delay is set to 1 second,
alarm output is generated if alarm status continues for
more than 1 second after the input value exceeds the
alarm setpoint. Further, when an alarm OFF delay is set
to 2 seconds, alarm output is released if normal condition
continues for more than 2 seconds after the input value has
returned to normal from the alarm status.
5.3.5 Direction of Relay Action
Set the direction of relay energizing in alarm-1 normal
condition and alarm-2 normal condition by selecting from
among NRM DEENERGIZED (de-energized under normal
condition) and NRM ENERGIZED (energized under normal
condition) in [E15: RL1 ACTION] and [E16: RL2 ACTION]
and set them.
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 sounds if the
condition where the input value
is 80% or more of high-limit
alarm continues for more than 1
second. After the alarm sounds,
when the condition where
input value is less than 70%of
the high-limit alarm continues
for more than 2 seconds, the
status returns to normal
The alarm sounds if the
condition where the input value
is 15% or less of low-limit
alarm continues for more than
3 seconds. After the alarm
sounds, when the condition
where input value is more than
20% of the low-limit alarm
continues for more than 4
seconds, the status returns to
normal.
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 1
A05 OUTPUT1 Output value 1
A06 OUTPUT2 Output value 2
A07 ALM1 STATUS Alarm-1 status
A08 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 1
B05 OUTPUT1 Output value 1
B06 OUTPUT2 Output value 2
B07 ALM1 STATUS Alarm-1 status
B08 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
D06 RESIST Total resistance
D22 INPUT1 L_RNG Input low range
D23 INPUT1 H_RNG Input high range
D38 OUT1 DR Direction of output-1 action
D39 OUT2 DR Direction of output-1 action
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-1 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
P10 ZERO ADJ1 Zero adjustment of input
P11 SPAN ADJ1 Span adjustment of input
P12 OUT1 0% 0% adjustment of output-1
P13 OUT1 100% 100% adjustment of output-1
P14 OUT2 0% 0% adjustment of output-2
P15 OUT2 100% 100% adjustment of output-2
P60 SELF CHK Self-check result
Q TEST Test
Q02 OUT1 TEST Forced output-1
Q03 OUT2 TEST Forced output-2
Q04 ALM1 TEST Forced output (alarm)
Q05 ALM2 TEST Forced output (alarm)
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.