Deviation Band Alarms - Brainchild BTC-2500 User Manual

3 11 Deviation Band Alarm 3 11 Deviation Band Alarm
A deviation band alarm presets two reference levels relative to set point. Two A deviation band alarm presets two reference levels relative to set point. Two
types of deviation band alarm can be configured for alarm 1 and alarm 2. These types of deviation band alarm can be configured for alarm 1 and alarm 2. These
are deviation band high alarm ( A1FN or A2FN select DB.HI ) and deviation are deviation band high alarm ( A1FN or A2FN select DB.HI ) and deviation
band low alarm ( A1FN or A2FN select DB.LO ). If alarm 2 is required, then band low alarm ( A1FN or A2FN select DB.LO ). If alarm 2 is required, then
select =AL2 for OUT2. Now A2FN can't be selected with NONE, otherwise select =AL2 for OUT2. Now A2FN can't be selected with NONE, otherwise
Er06 Er06 will appear. A1SP and A1HY are will appear. A1SP and A1HY are
deviation band alarm. Similarly, A2SP and A2HY are deviation band alarm. Similarly, A2SP and A2HY are
selected with deviation band alarm. selected with deviation band alarm.
Trigger levels of deviation band alarm are moving with set point. For alarm 1, Trigger levels of deviation band alarm are moving with set point. For alarm 1,
A A
trigger levels=SP1 A1DV. For alarm 2, trigger levels=SP1 A2DV. trigger levels=SP1 A1DV. For alarm 2, trigger levels=SP1 A2DV.
One of 4 kinds of alarm modes can be selected for alarm 1 and alarm 2. These One of 4 kinds of alarm modes can be selected for alarm 1 and alarm 2. These
are : Normal alarm, Latching alarm, Holding alarm and Latching/Holding alarm. are : Normal alarm, Latching alarm, Holding alarm and Latching/Holding alarm.
See See Section 3-9 Section 3-9 for descriptions of these alarm modes. for descriptions of these alarm modes.
Examples:
A1FN = DB.HI, A1MD = NORM, SP1 = 100, A1DV = 5 A1FN = DB.HI, A1MD = NORM, SP1 = 100, A1DV = 5
Process proceeds Process proceeds
105
100
ON
95 OFF
A1FN = DB.LO, A1MD = LTCH, SP1 = 100, A1DV = 5 A1FN = DB.LO, A1MD = LTCH, SP1 = 100, A1DV = 5
Process proceeds Process proceeds
105 105
100 100
95 ON
A1FN = DB.HI, A1MD = HOLD, SP1 = 100, A1DV = 5 A1FN = DB.HI, A1MD = HOLD, SP1 = 100, A1DV = 5
Process proceeds Process proceeds
105 105
100 100
95 95
A1FN = DB.HI, A1MD = LT.HO, SP1 = 100, A1DV = 5 A1FN = DB.HI, A1MD = LT.HO, SP1 = 100, A1DV = 5
Process proceeds Process proceeds
105 105
100 100
95 95
hidden hidden if alarm 1 is selected with if alarm 1 is selected with
ON
105
105
100 100
95
95
105
100
95 95
105 ON
100
95
105
ON
100
95
hidden hidden if alarm 2 is if alarm 2 is
A A
OFF
105 105
100
100
95
95
105 105
100 100
95
95
OFF
105 105
100 100
95 95 ON
105 105
100 100
95 95
UM25001D
2 Types of Deviation Band Alarms: 2 Types of Deviation Band Alarms:
DB.HI, DB.LO DB.HI, DB.LO
Deviation Band Alarm 1 Deviation Band Alarm 1
Setup: A1FN, A1MD Setup: A1FN, A1MD
Adjust: SP1, A1DV Adjust: SP1, A1DV
A A
Trigger levels= SP1 Trigger levels= SP1
Deviation Band Alarm 2 : Deviation Band Alarm 2 :
Setup : OUT2, A2FN, A2MD Setup : OUT2, A2FN, A2MD
Adjust : SP1, A2DV Adjust : SP1, A2DV
A A
Trigger levels = SP1 Trigger levels = SP1
Error Code Error Code
Figure 3.13 Figure 3.13
Normal Deviation Normal Deviation
Band Alarm Band Alarm
105
Figure 3.14 Figure 3.14
100
Latching Deviation Latching Deviation
95
Band Alarm Band Alarm
105
Figure 3.15 Figure 3.15
100
Holding Deviation Holding Deviation
95
Band Alarm Band Alarm
105
Figure 3.16 Figure 3.16
100
Latching /Holding Latching /Holding
95
Deviation Band Alarm Deviation Band Alarm
: :
A1DV A1DV
A2DV A2DV
51