HEIDENHAIN PWM 8 Operating Instructions Manual page 13

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:
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
subsequent electronics (with encoder supply voltage) is connected to the encoder output of the
interface board.
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.
TTL
HTL
1Vpp
11µApp
is only displayed, if the PWM 8 is part of the encoder circuit, i.e. if a
- 13 -
Interface board
Terminating resistor [Ω]
0 V
91
1200
not available
+U Switch-
encoder able
215 yes
1200 yes
1)
121 yes