Справочник Пользователя для Mitsubishi Electronics AJ65BT-D75P2-S3
12 - 52
MELSEC-A
12 CONTROL AUXILIARY FUNCTIONS
Example 3
(1) The conditions for calculation of the positioning address are indicated below.
Movement amount per pulse: 0.9 ( m)
Zero point address: 0.0 ( m)
Number of feedback pulses: 8192 (pulse)
(2) Calculate the positioning address from the range of using the number of output
pulses in Condition 1 and the expression of calculating the positioning address
(Expression 1).
(Expression 1).
Lower limit value of positioning address (calculated with the number of
negative side pulses in Condition 1)
(Positioning address) = (movement amount per pulse) (number of output
(Positioning address) = (movement amount per pulse) (number of output
pulses) + (zero point address)
= 0.9 (–268435456) + 0.0
= 241591910.4 ( m)
Upper limit value of positioning address (calculated with the number of
positive side pulses in Condition 1)
(Positioning address) = (movement amount per pulse) (number of output
(Positioning address) = (movement amount per pulse) (number of output
pulses) + (zero point address)
= 0.9 268435455 + 0.0
= 241591909.5 ( m)
(3) Since the calculated upper and lower limit values of the positioning address
are outside the range of Condition 2, use the positioning address in the
positioning range (–214748364.8 ( m) to 214748364.7 ( m)) of Condition 2.
positioning range (–214748364.8 ( m) to 214748364.7 ( m)) of Condition 2.
Zero point
0
-214748364.8
Unit: m
Range unusable in absolute position
detection system
detection system
-241591910.4
241591909.5
214748364.7
Setting disabled
Setting disabled
2. Concept when the unit is degree
The positioning address is within the range 0 to 359.99999 of the position
reached by a zero point return.
When the zero point position is not 0 , the range is also 0 to 359.99999 .
When the zero point position is not 0 , the range is also 0 to 359.99999 .
When positioning is performed in the same direction, control beyond the limit value
(when the address increases: 359.99999 0 , when the address decreases: 0
359.99999 ) cannot be carried out. (See below)
0
0
359.99999
359.99999
Zero point
Unusable in absolute position detection system.
At power on or reset, current value cannot be
restored normally.
At power on or reset, current value cannot be
restored normally.
Unusable in absolute position detection system.
At power on or reset, current value cannot be
restored normally.
At power on or reset, current value cannot be
restored normally.
Range usable in absolute position detection system.
(0 to 359.99999 )
(0 to 359.99999 )
For use in the absolute position detection system, set the upper and lower limit
values of the software stroke limit within the range 0 to 359.99999 .