HEIDENHAIN PWM 8 - Manual (Page 13)

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Switching over the measuring range of the PHA/TV scaling.
The following measuring ranges can be selected:
The scaling currently selected is highlighted. When choosing automatic scaling (auto), the scaling
is adapted to the biggest error (longest bar).
This soft key serves to activate the Options soft-key row.
The following functions are available:
Terminate Options
EXPERT-MODE; see section 5
The encoder can be powered INTERNALLY
(by the power supply unit) or EXTERNALLY (by
the subsequent electronics). Current setting:
encoder powered INTERNALLY
The power supply for the encoder can be switched
ON and OFF.
The terminating resistors for the scanning signals
(with TTL or HTL and 1 Vpp interface board only)
can be switched ON and OFF. The current setting is
stored in PWM 8 and reloaded after power
interruption.
Interface board Terminating resistor [
Ω
]
0 V +U
encoder
Switch-
able
TTL 91
215 yes
HTL 1200
1200 yes
1Vpp
121 yes
1)
11µApp not
available
1)
only possible with interface board Id.No. 323 077-XX or 312 246-01, index A
The active setting is highlighted in the Options soft-key row.
Note:
The soft key is only displayed, if the PWM 8 is part of the encoder circuit, i.e. if a
subsequent electronics (with encoder supply voltage) is connected to the encoder output of the
interface board.