Function description
Operating Manual PNOZ s30
1001715-EN-19
| 21
Configuration in the example:
} Wrong direction in anti-clockwise rotation
Max. right: 3 pulses
} Wrong direction in clockwise rotation
Max. left: 3 pulses
5.3.6 2 encoder diagnostics / broken shearpin monitoring
To increase the safety level of an encoder and for broken shearpin monitoring, an addi-
tional proximity switch or an HTL signal from an additional encoder can be connected to
track Z. These must both be configured as Z-frequency monitoring.
A monitoring function checks than the frequency difference on the tracks AB "f
AB
" to track Z
"f
Z
" is less than 10%.
Please note:
Monitoring for broken shearpins does not become active until
} The minimum speed has been exceeded and
} The tolerance for detecting plausibility errors has elapsed.
} Testing has not been deactivated via the parameter sets and input wiring.
The minimum speed and tolerance depend on
} The ratio of the frequency at tracks AB "f
AB
" to the frequency at track Z "f
Z
" in your config-
uration (fAB/fZ Verh. setting in the menu)
and
} The configured activation speed (v
ABZ
setting in the menu)
Minimum speed:
} when fAB/fZ Verh. ≥ 1.0
f
Z
= 10 mHz or f
AB
= (f
AB
/f
Z
) x 10 mHz
} when fAB/fZ Verh. < 1.0
f
AB
= 10 mHz or f
Z
= 10 mHz/(f
AB
/f
z
)
} f
AB
≥ v
ABZ
or f
Z
≥ v
ABZ
/ (f
AB
/f
Z
)
Tolerance for detecting plausibility errors:
} when fAB/fZ Verh. ≥ 1.0
7.5 Z-pulses or 7.5 x (f
AB
/f
Z
) AB-pulses
} when fAB/fZ Verh. < 1.0
4.5 AB-pulses or 4.5/(f
AB
/f
Z
) Z-pulses
5.3.7 Hysteresis
For each switch function F1 ... F9 (with the exception of direction and position), a hysteresis
can be configured. This prevents the outputs on the speed monitor from bouncing if there
are fluctuations around the response value. The hysteresis becomes effective when the
output is switched on:
Switch-on value = switching threshold – hysteresis
For the lower range limit:
Switch-on value = switching threshold + hysteresis
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