Mitsubishi Electric MELSEC iQ-R RD75P4, User Manual

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268
7 CONTROL SUB FUNCTIONS
7.7 Absolute Position Restoration Function
Condition 2: Positioning address
The following positioning addresses can be specified for the RD75:
■
Example 1
Using the formula 1, this example calculates the positioning address which can be specified in the system with the OP
address 214740000.0 (

m).
• Formula 1: (Positioning address) = (Movement amount per pulse)

(Number of output pulses) + (OP address)
• Condition
• Calculation of the upper limit value and lower limit value of positioning addresses
■
Example 2
This example shows the positioning address specification range that can be specified when degree is selected as the unit.
• In the absolute position detection system, the rage of the available positioning addresses is from 0

to 359.99999

,
regardless of the OP address.
• For positioning in one direction, control from maximum to minimum (for address increase: 359.99999

to 0

/for address
decrease: 0

to 359.99999

) cannot be exercised.
Unit setting Range of positioning addresses
mm -214748364.8 to 214748364.7

m
inch -21474.83648 to 21474.83647 inches
pulse -2147483648 to 2147483647 pulses
degree 0 to 359.99999

Item Value
Movement amount per pulse 0.1

m
Detected resolution 8192 pluse/rev
Upper limit value /lower limit value of positioning addresses Range of positioning addresses
Upper limit value 0.1

268 214740000.0 = 241582726.4

m
Lower limit value 0.1

(-268427264) + 214740000.0 = 187897273.6

m
241582726.4
214740000.0 187897273.6
-214748364.8 214748364.7
Unit: μm
(OP)
Setting not possible
Usable range in absolute
position detection system Unusable range in absolute
position detection system
Positioning address specification range
0° 0°
359.99999° 359.99999°
OP
Unusable in absolute position detection system.
Current value cannot be restored properly
at power-on or reset.
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.