Keba ServoOne User Manual

The TTL interface accepts various TTL signal types, which can be selected using
P558[0] - ENC_CH1_TTL_SignalType:
l (0)AF_B-A/Btracks(forwardcounting,X4encoding)-AB
l (1)AR_B-A/Btracks(reversecounting,X4encoding)-AB_inv
l (2)ABDFN-A:Clock(fallingedge),B:Direction(1=positive)-PulseDir
l (3)ABDRP-A:Clock(risingedge),B:Direction(1=negative)-PulseDir_inv
l (4)reserved
A maximum interpolation period, in ms (milliseconds), can be configured for the TTL
interface using P601[0] - ENC_CH1_Period. Within this context, Period is the
maximum time of “no activity” since the last TTL counter event:
l Period=0:Functiondisabled(default)
l Period>0(=nms):Ifnocountereventisregisteredinnms,thespeedwillbe
setto0.
Zero pulse
There is no parameter for activating the zero pulse evaluation here, as this
evaluation is controlled exclusively based on the homing mode (see Section
"Homing" on page 252). However, setting P541[0] - ENC_CH1_NpTest to1
provides a test mode that can be used during commissioning in order to be able to
activate the zero pulse evaluation even without homing. Scope signals 1014 and
1016 can be used to view a received zero pulse within this context. This test mode
must be disabled during normal operation (P541[0] = 0).
Commutation
Motor operation with pure incremental encoders needs for the auto commutation
function to be enabled without fail. For details see Section "Synchronous motor auto
commutation" on page 158.
ID No.: 0842.26B.5-01Date: 09.2020
ServoOne- Device Help
65
6 Encoder
6.5.5.1.2TTLincrementalencoderwithSSIabsolutevalueinter-
face
See Section "SinCos incremental encoders with absolute value interface" on page
66 and in specialSection "SSI absolute value interface" on page 68.
ID Index Name Unit Description
505 0 ENC_CH1_Sel=3  EncoderselectionsettoTTL(3)
510 0 ENC_CH1_Num  Encodergearing:Numerator
511 0 ENC_CH1_Denom  Encodergearing:Denominator
540 0 ENC_CH1_Abs  Selectionofabsolutevalueinterface
541 0 ENC_CH1_NpTest  ENCCH1,TEST-MODE:Indexpulsesignal(s)toScope
542 0 ENC_CH1_lines  Numberoflines(Sin/Cos/TTLencoders)
558 0 ENC_CH1_TTL_SignalType  Channel1:TTLsignalselection
601 0 ENC_CH1_Period  Maximumperiodofinterpolation(TTLencoder)
616 0 ENC_CH1_CycleCount  Samplingcyclein:nx125μ(microseconds)
Table 6.9: Parameters for Channel 1 (X7) - TTL encoder

Keba ServoOne Specifications

General

Brand	Keba
Model	ServoOne
Category	Controller
Language	English