Mitsubishi L Series User Manual

94
8.13 Difference Conversion Function
The scaling value (digital operation value) at the start of this function is treated as 0 (reference value). Thereafter,
values that increase or decrease from the reference value are stored in the buffer memory.
(1) Operation of the difference conversion function
When the difference conversion starts, the scaling value (digital operation value) at that time (the data stored
inside the A/D converter module before difference conversion) is determined as the difference conversion
reference value. The value acquired by subtracting the difference conversion reference value from the scaling
value (digital operation value) is stored in CH Scaling value (digital operation value) (Un\G54 to Un\G57).
Therefore, CH Scaling value (digital operation value) (Un\G54 to Un\G57) at the start of this function is 0. (since
the scaling value (digital operation value) equals to the difference conversion reference value at the start)
(2) How to use difference conversion
(a) Starting difference conversion
1. Change CH Difference conversion trigger (Un\G172 to Un\G175) from No request (0) to Trigger
request (1).
The rise of No request (0) → Trigger request (1) is detected as a trigger. When the trigger is detected, the
scaling value (digital operation value) at the start is output to the difference conversion reference value.
The value acquired by subtracting the difference conversion reference value from the scaling value (digital
operation value) is stored in CH Scaling value (digital operation value) (Un\G54 to Un\G57). After the
value is stored, CH Difference conversion status flag (Un\G190 to Un\G193) changes to Converting
difference (1).
20000
10000
7500
2500
0
No request (0)
6000 7500 10000 10000 75007500
6000 0 2500 2500 75007500
No request (0)Trigger request (1)
Not converted (0) Not converted (0)Converting difference (1)
0 7500
Time
CH Scaling value
(digital operation value)
(Un\G54 to Un\G57)
CH Scaling value
(digital operation value)
CH Difference conversion
reference value
(Un\G180 to Un\G183)
CH Difference conversion
status flag
(Un\G190 to Un\G193)
CH Scaling value
(digital operation value)
(Un\G54 to Un\G57)
CH Difference conversion
trigger
(Un\G172 to Un\G175)
-2500
Scaling value
(digital operation value)
Scaling value (digital operation value)
after difference conversion
Scaling value
(digital operation value)
Difference conversion reference value =-

Mitsubishi L Series Specifications

General

Brand	Mitsubishi
Model	L Series
Category	Engine
Language	English