Mitsubishi Electric R60AD8-G - Rate Alarm

1 FUNCTIONS
1.6 Alert Output Function
33
1
Set values within the range satisfying the condition "Process alarm upper upper limit value  Process alarm
upper lower limit value  Process alarm lower upper limit value  Process alarm lower lower limit value". If a
value out of the range is set, a process alarm upper lower limit value setting range error (error code: 1BH)
occurs.
Rate alarm
This function outputs an alert when the change rate of a digital output value is equal to or greater than the rate alarm upper
limit value, or the rate is equal to or smaller than the rate alarm lower limit value.
ON
ON
OFF
ON
OFFOFF
OFF
OFF
ON
OFF
OFF
0
(1) (2) (3)
(1) (2) (3)
Change rate of the
digital output value (%)
Digital output value
'CH1 Alert output flag
(Rate alarm upper
limit)' (Un\G38, b0)
'CH2 Alert output flag
(Rate alarm lower
limit)' (Un\G39, b1)
'Alert output signal'
(X8)
Rate alarm alert
detection cycle
Rate alarm upper
limit value
(CH1: Un\G524,
CH2: Un\G724)
Rate alarm lower
limit value
(CH1: Un\G526,
CH2: Un\G726)
Time
Time
Controlled by the A/D converter module
'CH1 Digital output value' (Un\G400)
'CH2 Digital output value' (Un\G600)
Change rate of CH1 Digital output value
Change rate of CH2 Digital output value
The change amount of the digital output value is converted to the change
rate at every rate alarm alert detection cycle. "Change rate > 0" if the change
amount increases, and "Change rate < 0" if the change amount decreases.
For the rate alarm upper limit value: 5.0%, and
the rate alarm lower limit value: -5.0%
No. Change rate of the digital output value
CH1 CH2
(1) 10.0%
3.0%
10.0%
An upper limit
alert issued
for CH1
No alert
issued
-3.0% No alert
issued
No alert
issued
(2) -10.0%
A lower limit
alert issued
for CH2
(3) -3.0%
:
:
:
:
:
:
Ex.
An upper limit
alert issued
for CH1