Various Interface Signals (A2)
1.2 Signals from PLC to NCK
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0
23
Position measuring system 1 (V380x 0001.5)
A position measuring system may be connected to the spindle. In this case the signal for the
spindle has to be set.
Axes always require this signal. In this case, a position measuring system must be installed.
Controller enable (V380x 0002.1)
When the controller enable is activated for the drive, the position control loop of the
axis/spindle is closed. The axis/spindle is then subject to position control.
When the controller enable is removed the position control loop and, with a delay, the speed
control loop of the axis/spindle are opened.
IS "Position controller active" (V390x 0001.5) is set to 0 signal (checkback).
Activation:
The controller enable for the drive can be set and removed from the following places:
1. From the PLC user program with interface signal "Controller enable" (in normal cases)
Application: Removal of controller enable before clamping an axis/spindle.
2. The controller enable is cancelled internally by the control when certain faults occur in the
machine, the drive, the position measuring system or the control (when faults occur)
Application: The traversing axes must be brought to a standstill by a rapid stop due to a
fault.
3. By the control if the following event occurs: IS "EMERGENCY STOP" (V2600 0000.1) is
active
Removal of controller enable for a moving axis/spindle:
● The spindle is braked to standstill with rapid stop taking account of MD36610
AX_EMERGENCY_STOP_TIME (duration of the braking ramp in error states). Alarm
21612 "Controller enable reset during movement" is then triggered.
● The position control loop of the axis/spindle is opened. Checkback signal to PLC with IS
"Position controller active" (V390x 0001.5) = 0 state. The timer for the controller enable
delay time (MD36620 SERVO_DISABLE_DELAY_TIME (shutdown delay of controller
enable)) is also started.
● As soon as the actual speed has reached the zero speed range, the drive controller
enable is removed. Checkback signal to PLC with IS "Speed controller active" (V390x
0001.6) = 0 state. The controller enable of the drive is removed at the latest after the time
set in MD36620 SERVO_DISABLE_DELAY_TIME has expired.
● Notice: If the setting for the controller enable shutdown delay is too small the controller
enable will be removed even though the axis/spindle is still moving. The axis/spindle is
then stopped abruptly with setpoint 0.
● The actual position value of the axis/spindle continues to be acquired by the control.
This axis/spindle state cannot be changed until after "Reset".
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