Mitsubishi Electric MELSEC-L LD75D, Руководство пользователя

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CHAPTER 12 CONTROL SUB FUNCTIONS
12
12.
6 Abs
olut
e Pos
ition
Res
tora
tion
F
unc
tion
Ex.
3
• There are the following conditions to calculate the positioning address:
• Calculate the positioning address from the output pulse count using range in Condition 1 and the
positioning address calculation expression (Expression 1).
• Since the upper/lower limit values of the positioning address calculated are outside of the range of
Condition 2, use the positioning address within the positioning range of Condition 2 (-214748364.8 to
214748364.7 (

m)).
(e) Concept for the unit of degree
• The positioning address is within the range 0 to 359.99999

at the position to which a machine OPR was
made. When the OP position is not 0

, the range is also 0 to 359.99999

.
• For positioning in the same direction, control from maximum to minimum (for address increase:
359.99999

to 0

/for address decrease: 0

to 359.99999

) cannot be exercised. (

Figures below)
• When positioning is to be used in the absolute position detection system, set the upper/lower limit values
of the software stroke limit within the range 0 to 359.99999

.

Movement amount per pulse: 0.9 (

m)

OP address: 0.0 (

m)

Feedback pulses = 8192 (pulse)

Lower limit value of positioning address (the number of negative pulses in Condition 1 is used for
calculation)
(Positioning address)
= (Movement amount per pulse)

(Number of output pulses) + (OP address)
= 0.9

(-268435456) + 0.0
= -241591910.4 (

m)

Upper limit value of positioning address (the number of positive pulses in Condition 1 is used for
calculation)
(Positioning address)
= (Movement amount per pulse)

(Number of output pulses) + (OP address)
= 0.9

268 0.0
= 241591909.5 (

m)
0
214748364.7 -214748364.8 -241591910.4 241591909.5
Unit: µm
OP
Setting disallowed Usable range in absolute position detection system Setting disallowed
Unusable in absolute position detection system.
Current value cannot be restored
properly at power supply on or resetting.
0
0
359.99999 359.99999
Usable range in absolute position detection system
(0 to 359.99999 )
Unusable in absolute position detection system.
Current value cannot be restored properly at
power-on or reset.
OP