Lsv2 Transmission Protocol; Timeouts - HEIDENHAIN iTNC 530 HSCI Technical Manual

Hide thumbs Also See for iTNC 530 HSCI:

Table of Contents

Load selected file

10.8.4 LSV2 transmission protocol

To read in a file from an external memory, the iTNC sends a header with the

iTNC to peripheral

<SOH><K>Name<E><ETB>BCC

The LSV2 protocol is a data transfer protocol for the two-way transfer of

commands and data.

The data is transferred in blocks—so-called telegrams—into which the data is

The following functions are possible:

Data transfer

File management, such as deleting, copying and renaming files

Changing, creating and deleting paths

Remote operation of the control functions. The control screen appears on

the computer monitor. All functions can be executed from the computer.

Real DNC operation. Starting and stopping the machine from the PC

Diagnosis of iTNC error messages and keystrokes for service purposes. The

last 1000 events are stored in the iTNC.

An LSV2 command can be used to disable/re-enable write-access on tables

exclusively for HEIDENHAIN-DNC.

The selected NC programs can be stopped and unselected in the Program

Run Single Block and Full Sequence operating modes.

HEIDENHAIN offers the respective software packages. Please contact

HEIDENHAIN for further information.

You can define your own times for timeouts in the system file OEM.SYS:

LSV2TIME0 = Timeout for receiving block STX to ETX (default 3 s)

LSV2TIME1 = Timeout for acknowledging ENQ or check sum (default 3 s)

LSV2TIME2 = Timeout when sending DLE 0, DLE 1 or NAK until a valid

character is received (default 1 s)

Input range: 0.001 to 3.6 s

If the code words are not defined or if the input range is exceeded, the

default values are used.

10.8 Data Transmission Protocols

Peripheral to iTNC