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MELSEC-
A
3 SPECIFICATIONS AND FUNCTIONS
Storage item Storage details
Current feed value
The currently commanded address is stored. (Differs from the actual motor position
during operation.)
The address of the current position is stored.
• Update timing : 56.8ms
• At completion of a machine zero point return, the zero point address is stored.
• When the current value is changed by the current value change function, a new
value is stored.
• By making parameter setting, a software stroke limit can be placed with the
current feed value.
Feedrate
The output speed commanded by the D75P2 is stored. (May be different from the
actual motor speed during operation.)
At the time of interpolation operation, the feedrates are stored as described below.
• Reference axis (Axis 1) : Composite speed or reference axis speed
(set in
Pr.21
)
• Interpolation axis (Axis 2) : 0
• The average speed per 910ms is stored. Therefore, the update interval is 910ms.
Valid M code
The M code, which is currently valid (set to the positioning data during current
operation), is stored.
0 is stored when the remote station READY signal turns OFF.
• Update timing: When the M code ON signal turns ON
Axis error No.
At axis error detection, the error code corresponding to the error definition is stored.
• The latest error code is always stored.
(When a new axis error occurs, the error code is overwritten.)
• When "error reset" [RY(n+2)4, RY(n+4)4] is turned ON, the axis error No. is
cleared (set to 0).