HEIDENHAIN TNC 430 PA/M - PLC Programming Example; Tool Changer and Basic Flowcharts of the Associated PLC Program

6 – 440 HEIDENHAIN Technical Manual TNC 426, TNC 430
6.21.5 PLC Programming Example
Tool changer and
basic flowcharts of
the associated PLC
program
7
77
7 Create the PLC program with the PLC development software PLCdesign.
The tool changer treated here has the following features:
n Up to 254 tools
n Variable pocket coding, MP7480.x = 4
n Special tools allowed
n Providing the next tool with TOOL DEF
n Tool change with TOOL CALL
n Tools can be manually changed without pocket number definition in the tool
table.
n Double changing arm
n Special tools variable, MP4541 = 0
The following variables are used in the basic flowchart:
n ISTREG = The pocket number at the tool change position of the tool
magazine
n GRE1 = Pocket number of tool in changing arm facing tool magazine
n GRE2 = Pocket number of the tool in the arm facing the spindle
n SPIREG = Pocket number of the tool in the spindle
Set Reset
W262 Tool pocket number NC NC
W264 Tool number NC NC
M4073 Strobe signal T code (P code) with TOOL
CALL
NC NC
M4074 Strobe signal T code (P code) with TOOL
DEF
NC NC
M4093 Acknowledgment of T code (P code) with
TOOL CALL
NC NC
M4094 Acknowledgment of T code (P code) with
TOOL DEF
NC NC
M4520 Further T code (P code) follows with
TOOL CALL
NC NC
M4524 Special tool called (TOOL CALL) NC NC
M4540 Sequence of the tool numbers
or pocket number transfer, M4520 = 1
PLC PLC
M4541 Special tool to original pocket
in spite of variable pocket coding
PLC PLC
SPIREG
GRE1 GRE2
ISTREG