Lenze i55AE155F

14.3.8 HTL input setpoint source
In case of the inverter i550, the digital inputs DI3 and DI4 can be congured as HTL input to
evaluate the signal of a cost-eecve HTL encoder or a reference frequency ("pulse train").
Many cost-eecve control systems have a pulse-train output as an alternave to a real ana-
log output.
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The HTL input can be dened as standard setpoint source. 4Selecon of setpoint
source ^ 148
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The "Acvate setpoint via HTL input" 0x2631:022 (P400.22) funcon enables a setpoint
change-over to the HTL input.
Precondions
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A setpoint change-over to the HTL input is only eected if no setpoint source with a higher
priority has been selected. 4Priority of the setpoint sources ^ 548
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For using the digital inputs DI3 and DI4 as HTL input, the corresponding input funcon
must be set in 0x2630:002 (P410.02). 4Conguraon of digital inputs ^ 594
Restricons
•
When the digital inputs DI3 and DI4 are congured as HTL input, these two digital inputs
are no longer available for other control funcons.
•
The HTL input can be either used for detecng an HTL encoder signal or a pulse train. They
cannot be used at the same me.
•
The maximum input frequency of the digital inputs is 100 kHz. If this frequency is excee-
ded, an error is triggered.
Flexible I/O conguraon
Setpoint change-over
HTL input setpoint source
565