Writing Traversing Programs
10-16
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
10.2
Program execution and direction of processing
Forward processing
As a rule, programs are processed by ascending block number.
Reverse processing
If programs are processed in reverse, the effects of commands must be taken into
account in the programming:
S
Commands are modal (G90, G91, G60, G64, G30
−
G39)
S
Active tool offset (G43, G44, D0
−
D20)
S
Change of coordinate systems via G87, G88, G89.
For these reasons, a distinction can be made between forward processing and re-
verse processing, in terms of both geometry and block transition response.
10.3
Block transitions
Overview
This chapter describes the influence of certain commands on block transitions.
Exact positioning - G60
G60 mode is overlaid with G50 and G88 to G89 (force block change on-the-fly).
The program advances to the next block when the target range is reached.
The influence of M functions is as indicated in machine data item MD32.
Output of M function before positioning
V
N
i
N
i+1
ÉÉ
ÉÉ
ÉÉ
É
É
É
M
t
ÉÉ
ÉÉ
ÉÉ
t
Case 1
Summary of Contents for SIMATIC FM 353
Page 22: ...Product Overview 1 12 FM 353 Stepper Drive Positioning Module 6ES7 353 1AH01 8BG0 ...
Page 32: ...Installing and Removing 3 6 FM 353 Stepper Drive Positioning Module 6ES7 353 1AH01 8BG0 ...
Page 282: ...Description of Functions 9 82 FM 353 Stepper Drive Positioning Module 6ES7 353 1AH01 8BG0 ...
Page 354: ...User Data Block AW DB B 16 FM 353 Stepper Drive Positioning Module 6ES7 353 1AH01 8BG0 ...