HEIDENHAIN PWM 20: 5 Operation

Operating Instructions

en

PWM 20

26

4.4.2 Connecting the PWM 20 into the control loop of an NC-controlled machine

For diagnostic purposes, the device can be integrated

into the control loop of an NC-controlled machine via

the encoder input and output (see "Encoder output X2",

page 25).

WARNING

Danger of electric shock!

If the device is integrated into the control loop of an

NC-controlled machine, the grounding conditions can

change.

Adapt the grounding and any specifics to the

respective conditions of use.

Depending on the ATS software version and under

compliance with the notes on the grounding conditions, the

device can be operated in a closed loop.

However, a signal adapter (e.g. SA 100, SA 110, …) must

always be used, or is recommended for use.

Connect the device in the following order:

First switch off the machine.

Then disengage the connecting elements.

4.5 Connecting a computer

A computer can be connected to the USB port X5 (USB

Type B) via its High-Speed USB 2.0 interface.

Connect the USB port of the computer to port X5 using

a USB cable (see "Items supplied", page 21).

For information on the location of the connections, see

"Rear panel", page 23.

For pin layout of X5, see "Q".

4.6 Connecting an external device

An external device with a 6-pin mini-DIN connection can be

connected to port X3.

Use a standard cable with a 6-pin mini-DIN connector to

connect the mini-DIN connection of the external device

to port X3.

For information on the location of the connections, see

"Front panel", page 23.

For pin layout of X3, see "O".

5 Operation

WARNING

Danger of damage to the machine or personal injury

when changing the encoder voltages during operation or

with unsecured vertical axes.

Do not change any parameters or encoder voltages

at the device while the machine tool is moving and a

PWM is connected to the control loop!

Always secure vertical axes to prevent them from

falling down before measurements are performed on

these axes!

CAUTION

Danger of damage to the machine or personal injury

when memory areas are not adapted.

Some interfaces, e.g. EnDat, offer the possibility

of storing machine- or system-specific data in the

customer's memory area. The data may comprise safety-

relevant information.

If servicing becomes necessary, ensure that the

memory areas with machine- or system-specific data

are adapted.

5.1 Switch-on / Switch-off Switch-on

For information on the location of the power switch, see

"Rear panel", page 23

Set the power switch to the 

I

 position.

Switch-off

Set the power switch to the 

0

 position.

The power switch is protected by all-pole fusing. 

To disconnect the unit completely from power,

the power connector must be disengaged.