Switching Drives On And Off; Readiness Of The Drives; Basic Settings For "Switching Drives On" - HEIDENHAIN iTNC 530 HSCI Technical Manual

6.8.5 Switching drives on and off

Readiness of
the drives
Basic settings for
"switching drives
on"
858
The procedure recommended by HEIDENHAIN for switching the drives on and
off, including the correct triggering of the brakes, can be configured with the
PLC basic program. HEIDENHAIN recommends using the PLC basic program.
The drives can only be switched on once the drive system is ready. This
includes:
the readiness of the supply unit (RDY.PS signal at X69 pin 17a – interrogation

via Module 9066 bit 5), the inverters (RDY signal at X51 to 64 pin 10b of the
PWM outputs) and of the motors.
the conclusion of the motor orientation (determination of the field angle).

that the inputs for axis-specific drive enable are released. These entries are

configured with MP4132.
Basic settings:
Ensure that the clamping or the brakes activate when an emergency stop is

effected.
Ensure via Module 9159 (drive controllers are switched off) that the

clamping or brakes activate before the drive controllers (current and speed
controllers) are switched off.
Interrogate the readiness of the HEIDENHAIN supply module with Module

9066 bit 5.
Before switching off the drives, save the positions of axes with common

encoders.
Ensure that all control components are wired correctly. HEIDENHAIN

recommends always wiring the system according to the basic circuit
diagram of the iTNC 530 HSCI. Registered customers can download the
current basic circuit diagram from the HESIS-Web Including Filebase on the
Internet at http://portal.heidenhain.de.
In MP2040.x, define the axis groups for the axis-specific drive enable and do

the proper wiring for controlling the drive enable. Use Module 9157 to
interrogate the status of the drive enable.
If drive enabling is missing for the PLC inputs specified in MP4132, the drive
motor is always switched off and a report is sent to the position controller.
Set W524 Bit 0 = 1, so that the control loop is opened and no error message

appears when the drive is switched off.
If drive enabling of axis groups via MP4132 is used, the PLC program should
perform a plausibility test to see if all axes used are defined in MP2040.x
Danger
If a bit is defined incorrectly in MP2040.x, the drive motor might not be
switched off through the PLC inputs specified in MP4132!
HEIDENHAIN Technical Manual iTNC 530 HSCI