Control In Operation - HEIDENHAIN TNC 426 PB/M Technical Manual

Table of Contents

If the control is at work, e.g. executing a positioning movement or an M

function, a symbol resembling an asterisk "*" is shown in the status window.

If a running NC program is interrupted with an external stop key, the control-

in-operation symbol blinks in the status display window.

In the POSITIONING WITH MANUAL DATA INPUT, the PROGRAM RUN,

SINGLE BLOCK and the PROGRAM RUN, FULL SEQUENCE operating

modes, these conditions are reported to the PLC with M4175 and M4176.

To delete or display the control-in-operation symbol through the PLC:

Ensure that the control-in-operation symbol is not already blinking or being

displayed by the NC.

Enter the command code in Module 9089.

Module 9089 Control in operation

The "control-in-operation" symbol can be set only if it is not already being

displayed by the NC, since the NC has priority over the PLC. If the symbol is

being displayed by the NC, it cannot be erased.

M4176 is not influenced by the display of the control-in-operation symbol

through the PLC.

B/W/D/K <Command code>

0: Erase the control-in-operation symbol

1: Display the control-in-operation symbol

0: Control-in-operation symbol was erased/displayed

1: Incorrect error code

2: Control-in-operation symbol is already displayed by the

3: Control-in-operation symbol is blinking

4: Control-in-operation symbol was not erased because it is

already being displayed by the NC

Error recognition:

Incorrect transfer parameter

Program interruption, control-in-

operation symbol blinks

Control is in operation, control-in-

operation symbol is on or is blinking

HEIDENHAIN Technical Manual TNC 426, TNC 430