Signals To Channel; Signals To Axis/Spindle - Siemens SINUMERIK 840D sl Function Manual

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A2: Various NC/PLC interface signals and functions

2.2 NC/PLC interface signals - only 840D sl

DB19 DBB17 (part program handling: Index of the file to be transferred from the user list)

Control byte for file transfer via hard disk to indicate the line in the user control file in which the

control file to be transferred is stored

DB19 DBB26 (part program handling: Status)

Status byte for current status of data transfer for "select", "load" or "unload", or if an error

occurred during data transmission.

DB19 DBB27 (error program handling)

Output byte for error values for data transfer via hard disk.

Signals to channel

DB21, ... DBX6.2 (delete distance-to-go)

The rising edge on the interface signal generates a stop on the programmed path in the

corresponding NC channel with the currently active path acceleration. The path distance-to-

go is then deleted and the block change to the next part-program block is enabled.

DB31, ... DBX1.0 (drive test travel enable)

Specifications for the drive test

It is the sole responsibility of the machine manufacturer / system startup engineer to take

suitable action / carry out appropriate tests to ensure that the machine axis can be traversed

during the drive test without putting personnel or machinery at risk.

If machine axes are traversed by special test functions such as "function generator", an explicit

drive-test-specific enable is requested for the motion:

DB31, ... DBX61.0 = 1 (drive test travel request)

The motion is carried out once the motion is enabled:

DB31, ... DBX1.0 == 1 (drive test travel enable)

Function Manual, 01/2015, 6FC5397-0BP40-5BA2

Basic Functions

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