Confirming The Current Value - Mitsubishi Electric MELSEC iQ-R Series User Manual

Confirming the current value

Values showing the current value
The following two types of addresses are used as values to show the position in the Motion module.
These addresses ("feed current value" and "machine feed value") are stored in the monitor data area, and used in monitoring
the current value display, etc.
Feed current value
• This is the value stored in "[Md.20] Feed current value".
• This value has an address established with a "machine home position
return" as a reference, but the address can be changed by changing the
current value to a new value.
The "feed current value" and "machine feed value" are used in monitoring the current value display, etc.
Home position
[Md.20] Feed current value
[Md.21] Machine feed value
Operation cycle error will occur in the current value refresh cycle when the stored "feed current value" and
"machine feed value" are used in the control.
Monitoring the current value
The "feed current value" and "machine feed value" are stored in the following buffer memory addresses, and can be read
using a "DFROM(P) instruction" or "DMOV(P) instruction" from the CPU module.
n: Axis No. - 1
Monitor item
[Md.20]
[Md.21]
3 MAJOR POSITIONING CONTROL
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3.1 Outline of Major Positioning Controls
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V
0 1 to
0 1 to
Feed current value
Machine feed value
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Machine feed value
• This is the value stored in "[Md.21] Machine feed value".
• This value always has an address established with a "machine home
position return" as a reference. The address cannot be changed, even if the
current value is changed to a new value.
Current value changes to 20000
with current value change instruction
Address after the current
value change is stored
10000 20000
10000
Address does not change even
after the current value is changed
Buffer memory address
Axis 1 to axis 16
2400+100n
2401+100n
2402+100n
2403+100n
t