Mitsubishi Electric MELSEC iQ-R RD75P4, User Manual

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3 MAJOR POSITIONING CONTROL
3.1 Overview of the Major Positioning Controls
Checking the current value
Values indicating the current values
In the RD75, the following two types of address are used as values to indicate the position.
These addresses (Current feed value and Machine feed value) are stored in the monitor data area, and used for monitoring
the current value display.
Current feed value and Machine feed value are used for monitoring the current value display.
Restrictions
When the stored Current feed value is used for the control, an error of 0.88ms will occur in the update timing of the current
value. When the stored Machine feed value is used for the control, an error of 0.88ms will occur in the update timing of the
current value.
Item Description
Current feed value • The value stored in [Md.20] Current feed value.
• This value has an address established with Machine OPR as a reference. However, the address can be changed by
changing the current value.
• This value is updated every 0.88ms.
Machine feed value • The value stored in [Md.21] Machine feed value.
• This value always has an address established with Machine OPR as a reference. The address cannot be changed even if
the current value is changed to a new value.
• This value is updated every 0.88ms.
0
V
20000
0
10000
10000
t
1 to
Current feed value
OP
The current value has been changed
to 20000 with the current value change.
1 to Machine feed value
The address after the current value
change is stored.
The address does not change even
after the current value has been changed.
Md.20
Md.21