Integral Monitoring System; Introduction - HEIDENHAIN iTNC 530 Service Manual

2

Integral Monitoring System

2.1

Introduction

iTNC 530 features a comprehensive integral monitoring system for the prevention of input or
operation errors, as well as for identification and diagnosis of technical errors on the control and
the connected units. The monitoring system is an integral component of the iTNC hardware and
software and is active as long as the control is switched on. The presence of a technical fault or
an operation error is made known through a plain-language message.
During operation, the iTNC monitors the following positions:
Amplitude of encoder signals
Edge separation of encoder signals
Absolute position for encoders with distance-coded reference marks
Current position (servo lag monitoring)
Actual path traversed (movement monitoring)
Position deviation at standstill
Nominal speed value
CRC sum of EPROM, RAM and Flash memory
Power supply
Buffer battery voltage
Operating temperature of MC 422 and CPU
Run time of PLC program
With digital axes, the iTNC also monitors:
Motor current
Motor temperature
Temperature of power module
DC-link voltage
Actual utilization of drive motors
Status of HEIDENHAIN inverters
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If the "Control is ready" signal output and the "Control is ready" signal acknowledgment input are
correctly connected to the emergency-stop loop, the control interrupts the loop via the "Control
is ready" signal output as soon as a dangerous error occurs.
July 2002
t of power module and motor
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