Rate Alarm - Mitsubishi Electric MELSEC iQ-R User Manual

Rate alarm

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This function outputs a warning 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.
Digital output value
Rate alarm warning
detection cycle
(A)
Change rate of the
digital output value (%)
Rate alarm upper limit
value (CH1: Un\G524,
CH2: Un\G724)
0
Rate alarm lower limit
value (CH1: Un\G526,
CH2: Un\G726)
'CH1 Warning output flag
OFF
(Rate alarm upper limit)'
(Un\G38, b0)
'CH2 Warning output flag
OFF
(Rate alarm lower limit)'
(Un\G39, b1)
'Warning output signal'
OFF
(X8)
Performed by the A/D converter module.
(1) The change amount of a digital output value is converted into the change rate at every rate alarm warning detection cycle. When the change amount
increases, the change rate is greater than 0. When the change amount decreases, the change rate is smaller than 0.
'CH1 Digital output value' (Un\G400)
'CH2 Digital output value' (Un\G600)
(B) (C)
(1)
Change rate of CH1 Digital output value
(A) (B) (C)
Change rate of CH2 Digital output value
ON ON
OFF
ON
OFF
ON
Time
Time
OFF
OFF
1.11 Warning Output Function
1
1 FUNCTIONS
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