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Chapter 8  OPR Control 

 

8.2.7 OPR method (5): Scale origin signal detection method 

The following shows an operation outline of the OPR method "scale origin signal 
detection method". 

 

POINT 

 

Set "0: Need to pass servo motor Z-phase after power on" in "Function selection C-
4 (PC17)". If "1: Not need to pass servo motor Z-phase after power on" is set, the 
error "Z-phase passing parameter invalid" (error code: 231) will occur at the start of 
scale origin signal detection method OPR. 

 

 Operation chart 

 

1) 

The machine OPR is started. 
(The machine begins the acceleration designated in "[Pr.51] OPR acceleration time selection", in the 
direction designated in "[Pr.44] OPR direction". It then moves at the "[Pr.46] OPR speed" when the 
acceleration is completed.) 

2) 

The machine begins decelerating when the near-point dog ON is detected. 

3) 

After deceleration stop, the machine moves in the opposite direction against of OPR at the "[Pr.46] OPR 
speed". 

4) 

During movement, the machine begins decelerating when the first zero signal is detected. 

5) 

After deceleration stop, the operation moves in direction of OPR at the "[Pr.47] Creep speed", and then 
stops at the detected nearest zero signal. 

6) 

The OPR complete flag ([Md.31] Status: b4) turns from OFF to ON, and the OPR request flag ([Md.31] 
Status: b3) turns from ON to OFF. 

 

After 3), when the zero signal is in the near-point dog
position, deceleration stop (4)) is started at the zero signal
without waiting for the near-point dog OFF.

Zero signal

ON

1)

2)

OPR direction

POINT

Pr.44

V

6)

3)

5)

4)

OFF

Near-point dog

Hardware limit switch

Pr.46

Pr.47

OPR speed

Creep speed

 

Fig. 8.10 Scale origin signal detection method machine OPR