Configuration 
30  DC1010/1020/1030/1040 Product Manual  8/05 
4.3.2  Deviation Alarm Overview 
The Alarm SP (Set Point) is to be changed as the SP moves. In this case, the Alarm SP 
preserves a certain deviation value with the SP. When an alarm is set, a certain deviation 
value with the preset SP should be defined. 
 
SP1
 
Deviation 
(Lower limit)
 
larm SP 
SP1 SP2
 
larm SP moves along SP change 
SP Change 
SP1 
Deviation 
U
er Limit
larm SP 
SP1 SP2
 
larm SP moves along SP change 
SP Change 
 
Figure 4-1 Deviation Alarms 
 
4.3.2.1  Types of Deviation Alarms 
: Set Point
: Alarm Set Point
: Set Point
: Alarm Set Point
 
Figure 4-2 Upper Limit Deviation Alarm [Hold On = Yes] 
(Alarm Code 01, Alarm release in the first alarming situation) 
 
 
 
Figure 4-3 Upper Limit Deviation Alarm  
(Alarm Code 11, No alarm release in the first alarming situation)