12 DATA USED FOR POSITIONING CONTROL
12.7 Monitor Data
479
12
[Md.21] Machine feed value
The address of the current position according to the machine coordinates will be 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 within the range of 0 to 359.99999
at the
communication start with servo amplifier after the power supply ON or CPU module reset.
• Machine coordinates: Characteristic coordinates determined with machine
Refresh cycle: Operation cycle
■
Reading the monitor value
Refer to "[Md.20] Current feed value".
Page 478 [Md.20] Current feed value
• Buffer memory address
Refer to the following for the buffer memory address in this area.
[Md.22] Feedrate
The speed of the operating workpiece is stored. (May be different from the actual motor speed during operation)
• During interpolation operation, the speed is stored in the following manner.
Refresh cycle: Operation cycle
In case of the single axis operation, "[Md.22] Feedrate" and "[Md.28] Axis feedrate" are identical.
In the composite mode of the interpolation operation, "[Md.22] Feedrate" is a speed in a composite direction
and "[Md.28] Axis feedrate" is that in each axial direction.
■
Reading the monitor value
Refer to "[Md.20] Current feed value".
Page 478 [Md.20] Current feed value
• Buffer memory address
Refer to the following for the buffer memory address in this area.
[Md.23] Axis error No.
When an axis error is detected, the error code corresponding to the error details is stored.
• The latest error code is always stored. (When a new axis error occurs, the error code is overwritten.)
• When "[Cd.5] Axis error reset" (axis control data) turns ON, the axis error No. is cleared (set to 0).
Refresh cycle: Immediate
■
Reading the monitor value
• Monitoring is carried out with a hexadecimal display.
• Buffer memory address
Refer to the following for the buffer memory address in this area.
Reference axis
Composite speed or reference axis speed (Set with [Pr.20])
Interpolation axis
0
Axis error No.
Monitor
value
Содержание RD77MS16
Страница 1: ...MELSEC iQ R Simple Motion Module User s Manual Application RD77MS2 RD77MS4 RD77MS8 RD77MS16 ...
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Страница 316: ...314 9 COMMON FUNCTIONS 9 4 External Input Signal Select Function Program example ...
Страница 317: ...9 COMMON FUNCTIONS 9 4 External Input Signal Select Function 315 9 ...
Страница 574: ...572 13 PROGRAMMING 13 4 Positioning Program Examples Parameter initialization program Flash ROM write program ...
Страница 575: ...13 PROGRAMMING 13 4 Positioning Program Examples 573 13 Error reset program Axis stop program ...
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