Rate Control Function - Mitsubishi Electric MELSEC iQ-F FX5 User Manual

Rate control function

Limits the increase or decrease amount of the analog output value per 80 s to prevent sudden change of the analog output
value.
Operation
If the variation amount of 'CH1 Digital value' (Un\G460) is larger than the value set by 'CH1 Increase digital limit value'
(Un\G514) and 'CH1 Decrease digital limit value' (Un\G516), 'CH1 Digital value' (Un\G460) is changed by the limit value set
for each digital limit value.
For 'CH1 Increase digital limit value' (Un\G514) and 'CH1 Decrease digital limit value' (Un\G516), the increase or decrease
value per 80 s is set; however, in actuality, the output value of the corresponding channel is updated with a cycle of "80 s
Number of conversion enabled channels".
Therefore, the analog output value is increased or decreased as follows with the update cycle.
• 1st time: D/A conversion value of the Increase/Decrease digital limit value
• 2nd time or later: D/A conversion value of "Increase/Decrease digital limit value  Number of conversion enabled channels"
If the digital value is changed during rate control, rate control will continue until a new digital value will be output. At this time,
if a digital value is set so that the increase/decrease direction is reversed, the initial output after change will be the D/A
conversion value of " 'CH1 Increase digital limit value' (Un\G514)  Number of conversion enabled channels" or " 'CH1
Decrease digital limit value' (Un\G516)  Number of conversion enabled channels".
Setting procedure
1.
Set "Rate control enable/disable setting" to "Enable".
[Navigation window]  [Parameter]  [Module Information]  Module model name  [Module Parameter] 
[Application setting]  [Rate control function]
2.
Set values for "Increase digital limit value" and "Decrease digital limit value".
Item
Increase digital limit value
Decrease digital limit value
Setting range
0 to 64000
2
2 FX5-4DA
195
2.4 Functions