HEIDENHAIN PWM 8 - Manual (Page 44)

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9.2 Example for Application
Testing a rotary encoder showing the following defects (leak circuits):
1. leak circuit between and
2. leak circuit between Ie1 and 0V/5V
Instruction Display Error Cause
Battery test:
press manual start button Running light = battery o.k.
LEDs dark =
battery
defective
Connect rotary encoder;
test starts automatically! Leak circuit is displayed between
and (1. leak circuit).
Test is not started.
(LEDs dark)
Press manual start button;
test is started. Light unit of the rotary encoder
defective or connection to light unit
interrupted.
Leak circuit is displayed between
and (1. leak circuit)
Eliminate leak circuit in rotary encoder!
Connect rotary encoder;
test starts automatically. The running light stops at the
"0V/5V" LED.
The leak circuit between 0V/5V
and Ie1 is indicated by the LEDs
0V/5V and Ie1 permanently lit.
(2. leak circuit)
Eliminate 2. leak circuit in rotary encoder!
Connect rotary encoder;
test starts automatically. Each of the 6 LEDs lights up for a
moment (running light) as long as
the rotary encoder is connected or
the manual start button pressed.
No leak circuit in the rotary
encoder!
After repair the test must be repeated until all LEDs light up like a running light.
Then there is no leak circuit in the test piece!
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