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6.3.2
Input from PLC
This is the method in which over travel is processed by software via the PLC.
It is possible to set the signal ON/OFF conditions by sequence program.
An stroke end cancel bypass circuit should be included in the over travel input circuit.
The bypass circuit can be formed by sequence program without incorporating a
hardware bypass circuit.
Normally, when the EMG RESET switch is pressed, the bypass circuit closes.
(Other switch, etc. can be used for this purpose.)
CNC–PLC interface addresses
(For details, see the CNC–PLC interface instruction manual provided separately.)
•
"+" side stroke end *+L01 ~ *+L04 (Addresses HF2E, HF26, ~)
•
"–" side stroke end *–L01 ~ *–L04 (Addresses HF2D, HF25, ~)
(X001)
PLC
input
module
(X002)
CN2
CPN1
(H420)
–3
–1
(Sequence program)
X002
H420
X001
H420
Axis 1 (–)
Axis 1 (+)
EMG RESET
pushbutton switch
HF2E
HF2D
Fig. 6.3.3
– 108 –
This switch has two normal
open contacts. One contact is
used for general-purpose input.
(The other contact is connected
to the emergency reset input.)
No. 1 axis "+" overstroke
(*+L01)
No. 1 axis "–" overstroke
(*–L01)
STE 73843
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