Mitsubishi Electric MELSEC iQ-R Series User Manual page 489

[Md.21] Machine feed value
The address of the current position according to the machine coordinates is stored. (Different from the actual motor position
during operation)
Note that the current value changing function will not change the machine feed value.
Under the speed control mode, the machine feed value is constantly updated always, irrespective of the parameter setting.
The value will not be cleared to "0" at the beginning of fixed-feed control.
Even if "degree" is selected as the unit, the addresses will become a cumulative value. (They will not have a ring structure for
values between 0 and 359.99999). However, the machine feed value is restored with cumulating the machine feed value
before the power supply OFF (the rounded value within the range of 0 to 359.99999) to the movement amount during the
power supply OFF at the communication start with servo amplifier after the power supply ON or CPU module reset.
As shown in the diagram below, the hexadecimal monitor value is changed to a decimal integer value. The decimal integer
value can be converted into other units by multiplying said value by the following conversion values.
Monitor value
E
A
(High-order buffer memory) (Low-order buffer memory)
A B C
Decimal integer value
Unit
m
inch
degree
pulse
• Machine coordinates: Characteristic coordinates determined with machine
Refresh cycle: Operation cycle
■Buffer memory address
Refer to the following for the buffer memory address in this area.
Page 401 Axis monitor data
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Low-order buffer memory
b15
F G H
E
High-order buffer memory
b31
B C D
A
Sorting
D E F G H
Converted from hexadecimal to decimal
Conversion value
-1
 10
-5
 10
-5
 10
0
 10
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b12 b8 b4 b0
F H
G
b28 b24 b20 b16
C
B D
12 DATA USED FOR POSITIONING CONTROL
12
487
12.7 Monitor Data