E1 Series Servo Drive User Manual Application Function
8-80 HIWIN MIKROSYSTEM CORP.
8.15.4 Resetting forced stop state
When FSTP signal is ON, the servo motor is disabled. If FSTP signal is OFF, the servo drive is in drive
ready (D-RDY) state. If S-ON signal is ON when FSTP signal is ON, the servo drive remains in drive
ready (D-RDY) state even when FSTP signal is OFF. The servo drive will only be in servo ready (S-RDY)
state after S-ON signal goes from ON to OFF and then is input again.
Figure8.15.4.1
Note:
When forced stop function is used, do not set servo on input (S-ON) signal to be always active (Pt50F = t.☐☐☐A).
Otherwise, FSTP state cannot be reset.
8.16 Full-closed loop function
8.16.1 Full-closed loop control
In full-closed loop control, an external linear encoder is installed to detect the machine position at load
side. The external encoder provides the servo drive with the information of machine position. High
precision positioning can be realized since the actual machine position can be obtained and is not
affected by coupling, screw backlash and other mechanism. However, loose or twisted mechanical part
could result in unstable positioning or vibration in full-closed loop control. Therefore, the servo drive
provides parameters for users to set for detecting alarms in full-closed loop control. The configuration of
full-closed loop control is shown as below.
D-RDY
FSTP S-RDY
OFF
ON
ON
Servo on input
(S-ON) signal
Drive ready output
(D-RDY) signal
ON
OFF
ON
(Forced stop)
OFF
(Normal operation)
Servo drive
status
Forced stop input
(FSTP) signal
ON
S-RDY
OFF
ON
ON
Servo ready output
(S-RDY) signal
OFF
(Normal operation)
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