Mitsubishi Electric Melsec iQ-R Series User Manual page 40

Application examples of rate alarms
A rate alarm serves to monitor that the change rate of a digital output value lies in a limited range as shown below:
Ex.
To monitor that a rising rate of a digital output value is within the specified range
RC
D
+30%
+20%
0
RC : Change rate of the digital output value (%)
D
t: Time
(1) Rate alarm upper limit value
(2) Rate alarm lower limit value
Ex.
To monitor that a drop rate of a digital output value is within the specified range
RC
D
0
-20%
-30%
RC : Change rate of the digital output value (%)
D
t: Time
(1) Rate alarm upper limit value
(2) Rate alarm lower limit value
Ex.
To monitor that a change rate of a digital output value is within the specified range
RC
D
+10%
0
-10%
RC : Change rate of the digital output value (%)
D
t: Time
(1) Rate alarm upper limit value
(2) Rate alarm lower limit value
1 FUNCTIONS
38
1.8 Warning Output Function
(1)
(2)
(1)
(2)
(1)
(2)
t
t
t