February 2012 25 – 411
Checking the keys The function of the handwheel keys can be seen from the respective PLC inputs. Use the PLC
diagnostic functions TABLE or LOGIC DIAGRAM for this purpose:
8 Switch on the machine.
8 Press the EMERGENCY STOP button.
8 Call the table with the PLC inputs or the logic diagram.
--> See ”Diagnosis tools in the PLC mode” on page 11 – 119.
8 Press the handwheel keys.
8 Check whether the corresponding inputs change to 1 (see table below).
MP7645 determines whether the handwheel keys are evaluated by the NC or the PLC.
Ask the machine manufacturer whether you may change the MP7645.0 for test purposes.
The PLC program may not permit this.
MP7645.0: 0
Evaluation of the keys by the NC
(Exception: The function keys A, B
and C are evaluated by the PLC.)
MP7645.0: 1
Evaluation of all keys by the PLC
XIVO96
I160
O97
I161
YVO98
I162
O99
I163
ZActual
position
capture
O100
I164
O103
I167
Slow
feed rate
Medium
feed rate
Fast
feed rate
O104
I168
O105
I169
O106
I170
– + I171 I172
O109
I173
O110
I174
O111
I175
O109
I173
O110
I174
O111
I175
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