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Technical Manual TNC 360 - heidenhain - DR. JOHANNES ...

Technical Manual TNC 360 - heidenhain - DR. JOHANNES ...

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3.6.4 Open control loop<br />

If, after the execution of an NC block, the control loop for a particular axis is opened and this axis is<br />

clamped, then it is necessary to delay this opening to give the clamp sufficient time to operate. The<br />

markers M2492 to M2495 were introduced for this purpose. If one of these markers is set, and the<br />

appropriate axis is in position, then the next NC block will only then be processed when the "Open<br />

control loop" marker (M2544 to M2547) has been set. After the control loops are opened the<br />

markers M2000 to M2003 are reset by the NC.<br />

As soon as the "Axis in position" marker is reset, the control loop must re-closed so that the axes<br />

can be moved again.<br />

Set Reset<br />

M2544 Open control loop X axis PLC PLC<br />

M2545 Open control loop Y axis<br />

M2546 Open control loop Z axis<br />

M2547 Open control loop 4th axis<br />

M2492 Await open control loop X axis PLC PLC<br />

M2493 Await open control loop Y axis<br />

M2494 Await open control loop Z axis<br />

M2495 Await open control loop 4th axis<br />

3.6.5 Actual - nominal value transfer<br />

If the markers M2552 to M2555 are set, then the actual position value will be transferred to memory<br />

as the nominal position value.<br />

Actual value transfer is possible only in the "<strong>Manual</strong>" and Electronic handwheel" modes of operation.<br />

Set Reset<br />

M2552 Actual - nominal value transfer X axis PLC PLC<br />

M2553 Actual - nominal value transfer Y axis<br />

M2554 Actual - nominal value transfer Z axis<br />

M2555 Actual - nominal value transfer 4th axis<br />

8/95 <strong>TNC</strong> <strong>360</strong> 3 Servo Positioning of the NC Axes 4-77

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