Mitsubishi Electric MELSECQ Series User Manual page 69

5
FUNCTIONS
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Table 5.2 Details of the coincidence detection operation example
No.
Coincidence detection is started by the following steps using the value set in the
coincidence detection point setting (Un\G6 and 7).
(1) Write a coincidence detection value (100) into the coincidence detection
(2) Write 1 (Change request) into the coincidence detection point change
1)*
(3) When the coincidence detection point change request (Un\G8) status
As long as the present value A (Un\G10 and 11)/present value B (Un\G200 and
2) 201) is smaller than the coincidence detection point setting (Un\G6 and 7), the
counter value small (X03) stays ON.
When the present value A (Un\G10 and 11)/present value B (Un\G200 and 201)
3) matches the coincidence detection point setting (Un\G6 and 7), the counter
value small (X03) turns OFF, and the counter value coincidence (X02) turns ON.
When the present value A (Un\G10 and 11)/present value B (Un\G200 and 201)
4) becomes greater than the coincidence detection point setting (Un\G6 and 7),
the counter value large (X01) turns ON.
Turn ON the coincidence signal reset command (Y01), and reset the counter
5) value coincidence (X02). If the counter value coincidence (X02) remains ON,
the next counter value coincidence (X02) cannot be output.
* Without the operations given in 1), coincidence detection using the value stored in the coincidence
detection point setting (Un\G6 and 7) is not performed.
POINT
• When the sequence program scan time is less than 2ms, be sure to make
the coincidence signal reset command (Y01) turn ON for 2ms or more by
using a timer, etc.
• When the present value A (Un\G10 and 11)/present valueB (Un\G200
and 201) matches the coincidence detection point setting (Un\G6 and 7),
if the coincidence signal reset command (Y01) is turned ON and OFF, the
counter value coincidence (X02) turns ON again.
• Coincidence detection processing inside the QD63P6 may cause the
counter value large (X01) or the counter value small (X03) to turn ON
when the counter value coincidence (X02) status changes from OFF to
ON.
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point setting (Un\G6 and 7).
request (Un\G8).
changes from 1 (Change request) to 0 (No change request), coincidence
detection is enabled with the value set in the coincidence detection point
setting (Un\G6 and 7).
5.3 Using the Coincidence Detection Function
Description
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