Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 46

■Operations of maximum value and minimum value
When the difference conversion starts, the maximum value and the minimum value of the values acquired by the difference
conversion are stored in 'CH1 Maximum value' (Un\G404) and 'CH1 Minimum value' (Un\G406). By turning on 'Maximum
value reset request' (Un\G473) and 'Minimum value reset request' (Un\G474), the maximum and minimum values after the
start of the difference conversion can be checked.
If 'Maximum value reset request' (Un\G473) or 'Minimum value reset request' (Un\G474) is not turned on, the maximum and
minimum values before and after the start of the differential conversion will be mixed.
'CH1 Difference conversion trigger' (Un\G470)
CH1 Digital operation value before difference
conversion
'CH1 Difference conversion standard value'
(Un\G432)
'CH1 Digital operation value' (Un\G402)
'CH1 Difference conversion status flag' (Un\G408)
'CH1 Maximum value' (Un\G404)
'CH1 Minimum value' (Un\G406)
'CH1 Maximum value reset request' (Un\G473)
'CH1 Minimum value reset request' (Un\G474)
'CH1 Maximum value reset completed flag' (Un\G422)
'CH1 Minimum value reset completed flag' (Un\G423)
■Operation when the averaging processing is set
If the difference conversion starts after the averaging processing is set, the digital operation value at the completion of the
averaging processing is determined as 'CH1 Difference conversion standard value' (Un\G432). 'CH1 Difference conversion
state flag' (Un\G408) turns to Converting difference (1).
• The difference operation function can be started at any timing.
• When the difference operation function is used with the digital clipping function, scaling function, and shift
function, each digital operation value is determined as a difference conversion reference value and used for
the difference conversion.
• Even though the digital clipping function, scaling function, and shift function are enabled during the
difference conversion, the value in 'CH1 Difference conversion standard value' (Un\G432) is not updated. To
update the value in 'CH1 Difference conversion standard value' (Un\G432), stop the difference conversion
and restart it again.
1 FX5-4AD
44
1.4 Functions
No request (0)
9950 10001 10000 10210 10510 12000 12100 13250
0 0 10000 10000 10000 10000 10000 10000
9950 10001 0 210
Not converted (0)
Maximum value/minimum value
before starting difference conversion
10001 10001 10001 10001 10001 2100 3250
10001
600 0 0
600
Trigger request (1)
9950
10000
510 2000 2100 3250 -50
Converting difference (1)
Maximum value/minimum value
after starting difference conversion
3250
0 2100 2100 -50
0
ON
OFF
ON
10100
10000
100
3250
-50
OFF