HEIDENHAIN ITNC 530 - Checking the Keys

23 – 392 HEIDENHAIN Service Manual iTNC 530
23.4 Checking the Keys
Correct
operation?
8 Make sure that the key really functions in the selected operating mode. --> Consult the
machine operator or see user's manual!
Visual inspection 8 First check the keypad visually!
 Is the key heavily contaminated (grease, dust, oil, etc.)?
 Are there any jammed chips?
The key may thus get stuck.
In such events carefully clean the machine operating panel. --> See “Corrective Action” on page
23 – 398.
 Is the key or the area around it heavily worn out?
This is an indication that the service life of the tool has expired and that it does not make contact
any longer.
Does the control
receive the key
signal?
The keys and buttons of the MB are assigned to PLC inputs:
Assignment of the PLC inputs to the keys of the MB 420:
Two further inputs (I151 and I152) may be wired via terminal block X3:
Here, for example, the CONTROL ON button is interrogated. --> See circuit diagram of the
machine.
Assignment of the PLC inputs to the keys of the MB 520:
The machine manufacturer can assign the keys marked with "free" to any PLC input. --> See
circuit diagrams of the machine.
I
136
I
135
I
134
I
137
I
128
I
148
I
133
I
149
I
129
I
130
I
131
I
132
I
138
I
143
I
145
I
139
I
150
I
140
I
141
I
142
I
146
I
147
I
144
Terminal X3 Pin layout
1I151
2I152
3+24 V