HEIDENHAIN TNC 335 Technical Manual - Manual (Page 10)

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TNC 360/TNC 335 Update Information No. 5 1-1
Update Information No. 5
For NC software types 260 02 and 280 49, software version 13 was released in mid-June1994,
software version 14 at the end of June, and software version 15 at the beginning of July.
Software version 13 contains the following enhancements:
The input range for machine parameter MP1350 (type of reference mark approach) was
expanded. An input value of 3 selects encoders with distance-coded reference marks, and
thedirection of traverse reverses when the trip dog for the reference end position is crossed.
Data transfer in blockwise mode (ACK/NAK protocol) could be interrupted if the control
characters STX or ETB were transmitted incorrectly. Since the TNC did not know the cause of
the interruption, it sends NAK (after a delay in which no further data are transferred) if a block
was not completely recognized due to a faulty STX or ETB.
If ACK is not received within a certain time, the error message TRANSFERRED DATA
INCORRECT N is generated.
If bit 3 in machine parameter MP7641 is set, the electronic handwheel is selected in each
operating mode (initially before REF traversing) to be able to interrogate the inputs of the
handwheel keys (except axis keys) in the PLC. The axis keys on the handwheel and the
handwheel impulses do not become active until handwheel mode is selected. After an error the
handwheel is not selected again until the handwheel key is pressed.
If the operating voltage of the control is outside the limit values, the blinking error message
PROCESSOR CHECK ERROR M is displayed.
The input range of machine parameter MP4220 has been expanded to 0 ... 65535.
The memory for the executable PLC program has been increased from 28K bytes to 32K bytes.
The value for the analog voltage of the analog input at connector X8 is transferred to word
W392.
The meaning of machine parameter MP7225 (automatic block generation with the capture
actual position key or with PLC marker M2829) has been changed as follows:
MP7225 = 1 : Block generation with the capture actual position key
MP7225 = 2 : Block generation with PLC marker M2829
MP7225 = 0 : No block generation
The resolution of the feed rate display depends on the programmed feed rate:
Feed rate
≤
31 999 mm/min (previously 29 999 mm/min): display step 2 mm/min
Feed rate
>
31 999 mm/min (previously 29 999 mm/min): display step 20 mm/min
Software version 14 was released to correct the following error:
If a STOP and an M function for PLC positioning were executed in one NC block, in the
following block an M function that becomes effective at the beginning of the block (e.g., M3)
was not executed!