7 – 4 HEIDENHAIN Technical Manual TNC 426, TNC 430
7.1.2 PLC Main Menu
After you have entered the code number (or pressed the PLC EDIT soft key)
the TNC displays the PLC main menu:
Processing time maximum:
Maximal run time of the PLC program.
The processing time of the PLC (time for one PLC scan) is given as a
percentage: 100 % is a run time of 3.5 ms.
The maximum run time of the sequential program must not exceed 300 %
(=10.5 ms). If it is higher, the TNC outputs the blinking error message PLC:
time out.
Processing time current:
The time taken for the latest PLC scan in %.
Code length:
Length of the translated sequential program in KB. Maximum value: 512 KB.
PGM in exec.mem:
Name of the last compiled PLC program (program in executive memory).
After switch-on, the TNC automatically compiles the program that was last
selected as sequential program. The PLC program is not active until it has
been compiled!
PGM in edit mem:
Name of the file in main memory.
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