HEIDENHAIN TNC 335 Technical Manual - Manual (Page 384)

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TNC 360 1 PLC Functions 7-5
1 PLC Functions
The integrated PLC in the TNC 360/TNC 335 contains its own Text Editor for creating the list of
instructions for the PLC program. Commands and comments are entered via the ASCII keyboard on
the control panel (see Section "Programming and editing files").
The functions TRACE and TABLE, as well as a Syntax check on entering the PLC commands and a
logical test with the Function COMPILE can make it easier to find faults in the PLC program (see
section "Test functions").
5 ms are available for a PLC run. Up to 4000 logic commands, equivalent to 28 KB, can be
processed within this period (executable memory). A new PLC run commences every 24 ms, i.e.
every 24 ms the inputs are read and outputs are set.
The following section shows how to start PLC operation.
1.1 Select PLC operation
PLC operation covers all functions for creating and testing the PLC programs.
It can be selected as follows, using the code number 807 667.
Select NC operating mode
"Programming and editing"
↓
Press MOD
key
↓
Enter code number 807 667
↓
ENT key
↓
PLC operation is selected
(Main menu)
PLC operation can be stopped by pressing the END key.