Mitsubishi L Series User Manual page 114

(2) Concept of integration cycle
Set the integration cycle according to the analog output cycle of the flow meter connected to the A/D converter
module. In addition, set this cycle as an integral multiple of the updating cycle of CH
operation value) (Un\G54 to Un\G57).
The updating cycle of CH
cycle of the specified A/D conversion method. The following table lists the conversion cycle of each A/D
conversion method.
A/D
conversion
method
Sampling
processing
Count average
processing
Time average
processing
Moving average
processing
*1 In the flow amount integration function, the conversion speed can be set in 1ms. Therefore, the conversion speed is
1ms.
*2 The value after the decimal point is rounded off.
If the setting value of CH
updating cycle of CH
integral multiple less than the value set in CH
the integration cycle.
Check the calculated integration cycle, which is stored in CH
Un\G1351).
When the integration cycle is calculated with the following settings
Ex.
• A/D conversion enable in CH1 to CH3
• "Averaging process setting" is "0: Sampling processing"
• "Integration cycle setting" is 5000
Since the updating cycle of CH
integration cycle is determined as 4998ms (the maximum cycle of an integral multiple of 3ms).
If CH Integration cycle setting (Un\G1308 to Un\G1311) is less than the updating cycle of CH
operation value) (Un\G54 to Un\G57), the flow amount integration function turns disabled and an error (error code: 212 )
occurs.
112
Scaling value (digital operation value) (Un\G54 to Un\G57) equals to the conversion
*1
Conversion speed × Number of used channels (ms)
Time set in "Time Average/Count Average/Moving Average"
Number of used channels
Number of times set in "Time Average/ Count Average/Moving Average" × Conversion speed
Number of used channels (ms)
*1
Conversion speed × Number of used channels (ms)
Integration cycle setting (Un\G1308 to Un\G1311) is not an integral multiple of the
Scaling value (digital operation value) (Un\G54 to Un\G57), the maximum value of an
Scaling value (digital operation value) (Un\G54 to Un\G57) is 3ms, the
Conversion cycle
Integration cycle setting (Un\G1308 to Un\G1311) is calculated as
Integration cycle monitor value (Un\G1348 to
Scaling value (digital
*2
Conversion Number of
*1
speed used channels (ms)
Scaling value (digital
*1
×