HEIDENHAIN PWM 8 - Manual (Page 10)

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e): Soft-key row for operation of PWM 8:
The soft-key row makes PWM 8 easy to operate. It automatically configures itself according to the functions
currently available.
Example: Soft-key row after power-on:
Standard setting of the soft-key row
f): Display field for the current assignment of the BNC sockets A, B and C:
This field contains the encoder signals currently fed to the
three BNC sockets BNC A, B and C.
2.8 Setting the Display Contrast
The contrast of the LC display of PWM 8 (Id.No. 309 956 X2) can be set from outside. The trimmer for
contrast adjustment is located next to the BNC socket C. A trimming screwdriver is required to change the
contrast. The contrast of PWM 8 units with the Id.No. 309 956 X1 can only be set internally.