- 14
–
Introduction
3) C
Δ M (cumulative feedback pulses travel per pulse machine position)
Check for a position shift in the following sequence.
1) When Q
≠ P
Noise entered in the pulse train signal wiring between the PC or PLC...etc and driver, causing
command input pulses to be miss-counted. (Cause A)
Make the following check or take the following measures.
Check the shielding.
Run wiring away from the power circuit.
Install a data line filter. (Refer to section 11.9 (2) (a).)
POINT
The noise immunity can be enhanced by setting parameter No. PA13 to "1 "
when the frequency of the command input pulse is 500kpps or less and "2 "
when 200kpps or less.
2) When P
CMX
CDV
Servo motor encoder resolution
FBP (parameter No. PA05) (Note)
≠ C
Note. When "0" is set to the FBP (parameter No. PA05), the FBP becomes the servo motor encoder resolution.
During the operation, the servo-on (SON), the forward/reverse rotation stroke end (LSP/LSN) was
turned off, or the clear (CR) or the reset (RES) was turned on. (Cause C)
If a malfunction may occur due to much noise, increase the input filter setting (parameter No. PD19).
3) When C
Δ ≠ M
Mechanical slip occurred between the servo motor and machine. (Cause B)