IKA A 58 ISI Series User manual

Ax58 ISI
User Manual
Ax58x ISI
Description
The absolute encoder with ISI interface, supplies an
incremental output with A and B channel (90°
shifted) and index pulse.
When switched on and enabled the encoder gives
out a pulse train corresponding to the current
absolute position. The output frequency after start-
up (FST) is described in tab.1.
After transmission of the pulse train the output
signals are the same like an incremental encoder.
ISI-encoders have two operation modes: "real-time
mode" and "burst mode".
Chapters
1 Safety summary
2 Identification
3 Installation
4 Mounting steps
5 Electrical Connections
6 Functions
7 Dimensional drawing
1 - Safety summary
For the electrical connections, we recommend to
closely follow these electrical instructions. In
particular, according to the 89/336/EEC norm on
electromagnetic compatibility, following precautions
must be taken:
•The unit should be installed as close as possible
to the controller.
•Always use shielded and twisted cables if
possible.
•Avoid running the sensor cable near high
voltage power cables (e.g. drive cables).
•Install EMC filters on sensor power supply if
needed.
•Avoid mounting sensor near capacitive or
inductive noise sources and switching power
supplies.
Connect according to the chapter 5: “Electrical
connections”.
2 - Identification
The device can be identified by the label's data
(ordering code, serial number). This information is
listed in the delivery document. For technical
features of the product to make reference at the
technical catalogue.
3 - Installation
Install the device according to the protection level
provided. Protect the system against knocks, friction,
solvents and respect the environmental
characteristics of the encoder.
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MAN Ax58x ISI I_E 1.1 Pag. 5 www.lika.it
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Ax58 ISI
- Mounting steps
In order to guarantee the maximum life of
mechanical parts of the encoder, we recommend to
use a flexible coupling between the encoder and the
motor shaft.
IMPORTANT:
You are strongly recommended not to carry out any
mechanical operations (drilling, milling…) on the
encoder’s shaft. This could cause serious damage to
the internal parts and the immediate warranty loss.
5 - Electrical connections
This device is to be supplied by a Class 2 Circuit or
Low-Voltage Limited Energy or Energy Source not
exceeding 30 Vdc.
EML121
12 Pin
connector
LIYCY
16 x 0,1 mm2
Cable
Function
1 Brown A
2 Red /A
3 Pink B
4 Yellow /B
5 Green 0
6 Blue /0
7 Red/Blue Enable
8 Violet Error output*
9 Brown/Green Zero setting
10 Grey/Pink Complementary
11 White/Yellow +10Vdc +30Vdc
12 Yellow/Brown 0Vdc GND
*: only for Singleturn version (AS58/…)
We recommend to follow the instructions below:
•While connecting, power must be switched OFF.
•Check correct lines and connections before
switching ON the device.
•We recommend that the device has to be
mounted as far as possible from any capacitive
or inductive noise source.
•Avoid routing the cable near high voltage power
cables in order to reduce influences of electric
noise.
•Only use shielded cables and wire with a cross
section between 0,14mm2 and 0,5 mm2.
•The shield of the cable and 0Vdc wire should be
connected to ground (GND).
•Electric noise sources should be linked with
noise suppression filters.
•Total length of connection cable from should
not exceed 50 m (55').
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MAN Ax58x ISI I_E 1.1 Pag. 6 www.lika.it
www.lika.bi

Ax58 ISI
6 - Functions
6.1 Operating modes
"Real-time mode"
In this mode the frequency of output signals is
proportional to the encoder speed. Pulse distance
changes in respect to the encoder speed. The max.
counting frequency in "Real-time mode" is FRT (see
Tab.1).
"Burst mode"
The encoder switches to this mode if the counting
frequency is higher than FRT. In order to speed up all
counting operations the microprocessor outputs all
pulses at a constant frequency FBM (see Tab.1). In
this case the encoder position (information from the
optical disc) is not equal to the current position. The
encoder will store the difference in a register and
balance it (recovering the difference between
encoder- and actual position) as soon as it switches
back to "real-time mode".
The time to recover current position depends on
how long the encoder works in burst mode. The
shorter the burst mode time the shorter the time to
recover current position.
NOTE:
If the encoder shaft is stopped while working in
burst mode it will still output a certain quantity of
pulses in order to recover it's position.
ATTENTION !
It's recommended not to use ISI encoders for
dynamic speed control while working with "burst
mode".
Tab. 1
Type Start-up
freq. FST
Real-time
freq. FRT
Burst mode
freq. FBM
AS58 ISI 1,2 kH < 100 kH 100÷120
kH
AM58 ISI 80 kH < 20 kH 20÷56 kH
6.2 Singleturn version (AS)
Enable (input)
Enables or disables the encoder. Delay time between
input activation and signal output is 400 msec.
•Input high (+10Vdc +30Vdc): encoder disabled.
No pulse output. A and B are high, 0 is low.
•Input low (0Vdc): encoder enabled. Position
output after 400 msec. A and B give out current
position by means of a pulse train. After
transmission of the pulse train the output
signals are the same like an incremental encoder.
0 give out a index signal.
Zero setting (input)
Sets the encoder's current position to ero (0).
•Input high (+10Vdc +30Vdc) : ero setting
•Input low (<8Vdc) : function not enabled
Complementary (input)
Allows to change counting direction by means of an
input signal.
•Input high (+10Vdc +30Vdc) : ccw counting
•Input low (<8Vdc) : cw counting (standard)
Error (output)
Indicates if any error occurs to the encoder while
processing data.
•Output high (+10Vdc +30Vdc) : no error
•Output low (0Vdc) : error
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MAN Ax58x ISI I_E 1.1 Pag. 7 www.lika.it
www.lika.bi

Ax58 ISI
6.3 Multiturn version (AM)
Enable (input)
Enables the encoder (only while switching on!). After
enable the encoder gives out a pulse train (A, B)
corresponding to the current absolute position.
Index signal (0) is high as long as the encoder
transmits the pulse train.
•Input not connected : encoder disabled.
•Input low (0Vdc) : encoder enabled. In order to
enable the unit, connect the input at last 100 ms
to 0Vdc, afterwards, is the same to leave input
low or high.
Zero setting (input)
Sets the encoder's current position to ero. Index
signal (0) is high as long as the Zero setting input is
high.
•Input high (+10Vdc +30Vdc) : ero setting (min.
100 ms)
•Input low (<8Vdc) : function not enabled
Complementary (input)
Allows to change counting direction by means of an
input signal (only while switching on).
•Input high (+10Vdc +30Vdc) : counter clockwise
counting
•Input low (<8Vdc) : clockwise counting
(standard)
7 - Dimensional drawing
Check details on product catalogue.
Rev. Man.Vers. Description
1.0 1^ issue
1 1.1 Chap. 5, 6.2 and 6.3 corrections
Lika Electronic
Via S. Loren o, 25 - 36010 Carrè (VI) - Italy
Tel. [phone]
Fax [phone]
Italy: eMail inf[email protected] - www.lika.it
World: eMail [email protected] - www.lika.bi
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MAN Ax58x ISI I_E 1.1 Pag. 8 www.lika.it
www.lika.bi