Mitsubishi Electric MELSECQ Series User Manual page 65

5
FUNCTIONS
Subtraction
1998
2000 of ring counter upper limit value (Un\G2 and 3)
is not stored in present value A (Un\G10 and
11)/present value B (Un\G200 and 201).
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c) Count operation
• Addition count
Even if the present value A
and 201
counter lower limit value
addition pulse, "Ring counter upper limit value (Un\G2 and 3) +1" is stored
in the present value A
201
• Subtraction count
When the present value A
and 201
ring counter lower limit value
present value A
In both cases of addition and subtraction counts, the ring counter upper limit
(
value
present value B
d) Setting example
When the count is enabled with a ring counter lower limit value
)
1 of 0, ring counter upper limit value
value A
Present counter value
3000
0
2147483646 -2147483648
2147483647
Ring counter upper
limit value
Ring counter lower
(2000)
limit value
1999 0 1 2
Figure 5.6 Ring counter operation example 2
search engine
(
)
reaches the ring counter lower limit value
(
Un\G0 and 1
(
Un\G10 and 11
).
( Un\G10 and 11
)
reaches the ring counter upper limit value
(
Un\G10 and 11
)
Un\G2 and 3 is not stored in the present value A
(
Un\G200 and 201
( )
Un\G10 and 11 /present value B
-2147483646
-2147483647
1998 1999
2000 of ring counter upper limit value (Un\G2 and 3)
is not stored in present value A (Un\G10 and
11)/present value B (Un\G200 and 201).
)
Un\G10 and 11 /present value B
(
Un\G0 and 1
)
is held as it is. And by the next
)
/present value B
) /present value B
(
Un\G2 and 3
( )
Un\G0 and 1 is automatically stored in the
) (
/present value B Un\G200 and 201
(
Un\G10 and 11
)
.
( )
Un\G2 and 3 of 2000, and present
(
Un\G200 and 201
Addition
Ring counter upper
limit value
Ring counter lower
(2000)
limit value
0 1 2
5.2 Selecting Counter Format
5.2.2 Selecting the ring counter
1
(
Un\G200
)
, the ring
2
(
Un\G200 and
( Un\G200
)
, the
3
).
)
/
4
(
Un\G0 and
)
of 3000
+2147483647
5
Ring counter upper
limit value (2000)
6
Ring counter lower
limit value (0)
-2147483648
7
8
5
- 9