Lenze E94AYFLF Digital frequency module - Manual (Page 14)

Digital frequency extension module | Parameter setting & configuration
Digital frequency input
Parameter setting
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EDS94AYFLF EN 3.2 - 10/2010
2.2.5 Voltage control - TTL encoder
If a TTL encoder is connected as the signal source and C13010 / C14010 is set to TTL
encoder, the encoder can be supplied with a controlled +5 V voltage via pin 4, which serves
to compensate the voltage drop on the encoder cable.
2.2.6 Monitoring
Initialisation time
In
C13013 / C14013 an initialisation time can be set, which must elapse after starting the
system before the monitoring modes are switched active.
 Thanks to this "delay" other system parts which serve as signal sources, can initialise
themselves first without monitoring being triggered due to missing signals.
 In the "0" setting the initialisation time is set to infinity so that monitoring is
deactivated permanently.
 If the setting is changed from "0" to another value, the initialisation time is restarted.
– A higher-level control can, for instance, switch monitoring active by a corresponding
parameter setting of C13013 / C14013 even if the device has been switched on for a
long time.
Monitoring of the +5 V voltage for the encoder
If an encoder is connected to X9 and supplied by the digital frequency extension module
"in a controlled way", the pin 8 of the digital frequency input X9 serves to control and
monitor the +5 V encoder voltage.
 If the voltage control is not able to compensate the voltage drop, a fault message is
created and the response set in C13042 / C14042 is executed.
– At the same time the output DFIN_bVccCtrlLimited of the system block
LS_DigitalFrequencyInput is set to TRUE.

Stop!
If an encoder is connected to X9 and supplied by the digital frequency extension
module "in a controlled way", the pin 8 of the digital frequency input X9 serves
to control and monitor the +5 V encoder voltage.  Monitoring
In this case, no digital signal ("Lamp control" or "Enable") may be supplied to PIN
8!
Please also observe the documentation for the encoder used.