Nc Supply Voltage Monitoring - HEIDENHAIN TNC 426 PB/M Technical Manual

Table of Contents

6.11.6 NC Supply Voltage Monitoring

The rectified voltage is monitored. Monitoring is worthwhile only with digital

axes. The supply voltage must lie within the defined range (See "Supply

Voltage for Control-is-Ready Signal (LE 426 M, LE 430 M)" on page 3 – 29). A

transient overvoltage (approx. 5 s) up to 720 Vdc is permitted.

If 720 Vdc is exceeded, the NC revokes the pulse release (reset) for the IGBT

of the power stage. The motors coast out of loop to a stop. No energy is

returned to the dc link.

Below 385 Vdc, all drives are brought to a controlled stop. PLC outputs are

switched off, and the control displays the error message POWER FAIL. The

control must be turned off and on again.

Below 155 Vdc the control is reset.

Below 135 Vdc the dc-link power supply switches off.

Module 9167 Supply voltage monitoring

With this module you can switch the monitoring for supply voltage >385 Vdc

If you don't call the module during the first PLC run-through, the supply voltage

monitoring is automatically started after the first PLC run-through.

B/W/D/K <Command code>

0: Supply voltage monitoring for >385 Vdc off

1: Supply voltage monitoring for >385 Vdc on

0: Command executed

–1: Transferred parameter invalid

Error recognition:

Supply voltage monitoring on or off

Error code in W1022

Transferred parameter invalid

HEIDENHAIN Technical Manual TNC 426, TNC 430