Hohner PR90 Series User manual

USER MANUAL v1.0

PR90 / PR90H
Features
Auto sensig features
Working margins
Protection
1
p. 4
p. 5
p. 5
p. 6
CONNECT
Requirements
Connection Steps
Connect to PC
Install software
Run the program
p. 8
p. 9
p. 9
p. 9
p. 12
2
PROGRAM
Overview
Instructions
Monitoring
Alarm panel
Considerations
p. 14
p. 15
p. 17
p. 18
p. 19
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Contents
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USER MANUAL PR90 / PR90H

1
PR90 / PR90H

USB and graphical interface programming options for
the PR90 programmable incremental optical encoder:
Incremental optical encoder, programmable for any possible
number of pulses from 1 to 65.536 pulses per rotation.
Output Level selectable - HTL ( Push-Pull ) / TTL (RS422)
regardless of input voltage.
Reference signal width (Z) - 90º or 180º
Reference signal positioning (Z) electrical vs. mechanical – 0º
to 360º
Selectable rotation direction:
CW (as seen from the axis, clockwise rotation)
CCW (as seen from the axis, counter-clockwise rotation)
Independent channel by channel inversion option.
Very useful in case of connection errors.
Remote maintenance and programming options.
Features
Direct USB2 to USB2 encoder connection to any
computer or Tablet-PC running Windows, MAC OS
or Linux, without the need for intermediate adapter
boxes.
Power-On programming
(encoder powered up)
Encoder can be programmed while it is powered up,
with no need to disconnect it from the machine.
Power-Off programming
(without powering up the encoder)
Ability to program the encoder without the need for it
to be powered up, only by connecting the encoder to
the PC programmer.
Encoder PR90 / PR90H
4
PR90
PR90
CONTROL
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PR90 / PR90H

Auto sensing features
Automatic voltage detection. The equipment determines the output level (HTL/TTL) according to input voltage. From 4.5Vdc to 10Vdc
output will remain in TTL, from 11Vdc to 30Vdc output level will be maintained in HTL as long as the device is programmed for HTL output.
Automatic overload detection in the encoder driver. In the event of a short circuit or overload in any of the outputs, the device will switch
to TTL until the error is remedied. The encoder's LED with blink red and the graphic interface will display the relevant red indicator, registering
the error, without interrupting the normal function of the device.
Automatic Driver/PLC input impedance detection. When the encoder is programmed for HTL outputs, if a driver/PLC with TTL inputs
(120O x Channel) is connected, the encoder will switch outputs to TTL automatically.
Automatic humidity detection inside the encoder. Water, humidity and condensation alarms. The encoder's LED with blink red and the
graphic interface will display the relevant red indicator, registering the error, without interrupting the normal function of the device.
Optical error detection. Any dysfunction in the OptoAsic illumination or breakage of any of the optical elements is automatically detected
and is described by the graphical interface alarms, logging the error, without interrupting the normal operation of the encoder.
Working margins
The PR90 is ready to work
from 4.5 Vdc to 30 Vdc,
with HTL and TTL loads
Operating
temperature range
from -20ºC to +85ºC
Humidity levels
should not surpass
98% without
condensation
Protection
IP65
Encoder PR90 / PR90H
5
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PR90 / PR90H

Protection
Over voltage and power supply inversion protection. The encoder is protected to prevent its destruction in case of reverse polarity of
power and/or spikes exceeding 35Vdc.
Voltage drops. The device stops working below 3.9 Vdc. Up to this point the PR90 maintains the outputs at standard TTL levels, and if the
voltage drop has been excessively slow the encoder goes into protection mode; to reset the rated voltage to recover its normal operation
you must just turn it off and on again.
Electrostatic and/or electromagnetic discharges. Complies with the EMC directive (UNE-EN 61000-6-2:2006 + ERR:2009 and UNE-EN
61000-6-3:2007 + A1:2012). Although the equipment is protected to withstand electrostatic discharge above ± 15KVolt., occasionally the
signal may lose a certain number of pulses during the discharge, at this point the equipment will reset the signal in under 100msec, the
standard delay for a Watch-Dog circuit.
Active reset of the high-efficiency uController. This circuit resets uController operation in extreme cases of malfunction. For example,
this situation can occur in unstable or high-noise power connections.
False power connections. The encoder is protected to withstand being switched on and off repeatedly within the margins of usual
operation, without the equipment being harmed.
The electronic circuit has ultra-fast electronic fuses; in the event of a fault or failure, these fuses avoid greater damage and more
expensive repairs.
Electronics designed under the BSI security regulations, so as to avoid smoke and fire.
4-layer printed circuit designed under MIL standards, to offer greater mechanical robustness in order to avoid external radio-magnetic
influences.
Encoder PR90 / PR90H
6
It is not recommendable, like with any other electrical device, to turn the equipment on and
off repeatedly in rapid succession while connected to mains power.
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PR90 / PR90H

2
connect

Requirements
A uUSB/USB cable A PC or Tablet-PC running
Windows, Mac OS o Linux
(with the latest version of Java installed)
Download the
programming software from the
Hohner Automaticos website
Minimum system requirements for the programming computer:
32 or 64 bit OS, Java compatible.
Recommended OSs: Windows XP, OS 6, Ubuntu 11, Fedora 16
or higher. Other Java-compatible OSs may work, but they have
not been tested.
The computer must have the latest version of Java installed,
where the RXTX communication libraries will be added. Details of
this process will be listed in the installation instructions.
The programming computers must have a free USB1 or USB2
port.
Recommended configuration, the computer should have at least
an Intel I3 or similar processor and 2 GB or RAM. Other, less
powerful, computers may also be used, but this will decrease
programming and monitoring speeds.
It is recommended that you have an internet connection, both to
keep the software and the database updated, and to make
remote maintenance of the encoder possible.
Before proceeding to connection and programming, you must
make sure that the computer is virus and trojan-free.
Connect
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PR90 / PR90H

Pay special attention to the TTL / HTL output configuration, since
if the proper voltage output is not selected, the devices
connected to the encoder could report read errors.
Make sure, before you connect the encoder, that
the configuration required for the encoder is the
correct type for your application.
Step 2: Programming software installation
For the PR90 programmable incremental optical encoder to work correctly, you must follow the detailed configuration instructions
below:
2.1 You can install the latest version of Java
from the Web:
https://www.java.com/es/download/
install Java on
your computer
Software compatible from version
8.45 of Java
Connect
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PR90 / PR90H
Step 1: Connect the PR90 encoder to a USB port
You must open the connection cover located at the back of the PR90 encoder.
The connection is direct, using a uUSB / USB cable to connect to any computer or
tablet-pc, without any other equipment being required.
1.1 direct connection
to a USB port

From the Hohner website, download the programming software required for your Operating System.
2.2 download the
programming software
2.3 decompress and run the
installation program
Once the programming software has been downloaded, decompress the .zip file and run
the installation program by clicking on the corresponding icon.
Choose the language, and follow the instructions on screen:
It is preferable to deactivate automatic Java updates. Otherwise, when Java updates, the
interface will stop working and you will have to download the newest version of the software.
Connect
10
A
Mac OS X 32/64-bitWINDOWS 32/64-bit
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PR90 / PR90H

BAutomatic alert about the installation
process and the Java version
CThe program will install PR90 - HOHNER
in the chosen folder
DThe installation will create short cuts to the
program in the chosen Start Menu folder
EChoose the additional tasks; create a desktop
icon
FThe program is ready and configured for
installing PR90 on your system
GFinish the installation and exit the installation
wizard
Connect
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PR90 / PR90H

Without disconnecting the PR90 from any of the computer or tablet's USB ports, open the "Communication
Port" menu on the interface, choose the corresponding communications port (COMX), where the
encoder is connected.
Once chosen, click on the button in the upper bar. In approximately 2 seconds the programming
interface will fill out with the monitoring and programming screens.
3.1 configure the
COM port
menu on the interface, choose the corr
A
, wher
B
Once chosen, click on the button in the upper bar. In appr
C
A B
Step 3: Run the programming software
C
If an error message appears, click on "Refresh" and
then choose the port where the PR90 is
connected from the drop-down menu.
connected from the drop-down menu.
B
Connect
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PR90 / PR90H

3
program

Monitoring Screen Programming Screen
When you connect the device, the computer will recognize the PR90 and you will hear the connecting devices sound and will see a
flashing green led on the encoder for 1 second.
Program
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PR90 / PR90H
Visualization Options
V
V
VV
See monitoring and programming screen See only programming screen See only monitoring screen

Programming Instructions
The configurable parameters are:
PPR programming can be carried out by clicking on the
different values in the table or by interacting with the keyboard.
However, the desired value will not be selected for your
programming unless you select it from the drop-down menu.
For example: if you want to enter a value
of 10,000 PPR, open the PPR
drop-down menu, keying in 10,000.
Then, select the desired value with a
mouse click in the drop-down menu.
Pulses per
revolution (PPR)
from 1 to 65.536 PPR
A
When you select one of the output
channels (channel A, for example), this
will switch the differential outputs from
A - nA to nA - A.
This option can make physical connection
of the encoder to the PLC / Driver.
Differential output
inversion
channel by channel A / B / Z
D
This setting will move the starting point for
electrical connection to the mechanical
start point, according to the selected
mechanical degrees.
A and B channel synchronization will be
maintained at all times.
Reference signal
position (Z)
0º to 360º
E
Reference signal
width (Index, Z, 0)
90º (synchronized with A and B)
180º (synchronized with A)
F
This output can be programmed regardless
of input voltage.
The PR90 encoder considers TTL from 4.5 to
10Vdc and HTL from 11 to 30 Vdc. If input
values are below the HTL limit, the PR90 encoder
will automatically switch output to TTL..
Output type
TTL (RS422 5Vpp. Differential)
HTL (Push-Pull 11~30Vpp. Differential)
B
Rotation direction
CW
(channel A leads B,
view from the shaft,
shaft rotating clockwise)
CCW
(Channel B leads A,
view from the shaft,
shaft rotating counterclockwise)
C
During Power-On programming (encoder powered-up), the PR90
should NEVER be programmed with the machine in operation.
At the time of programming information can be lost until programming has
finished, and this could cause unexpected behaviour in the machine
connected to the encoder.
Program
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PR90 / PR90H

HWe can verify that the data has been recorded
correctly by clicking on "Read Encoder" in the upper
task-bar in the programming screen.
Thus, we verify that the data we have loaded
corresponds to the date recorded in the PR90 and
that the alarm status has been updated.
Read Encoder
GRecord the configuration to the encoder
Once these options have been selected, click on
"Write Encoder" in the upper task-bar of the
programming screen.
The upper task-bar should show green, confirming
data recording progress, showing the term "ACK:".
Which means that the recording process has finished
correctly.
Write Encoder
Default configuration
The encoder comes default
preconfigured with:
- Pulses: 4096 ppr
- Output: HTL
- Direction: Clockwise (CW)
- Reference signal position (Z): 0º
- Reference signal width
(Índex, Z, 0): 90º
Program
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PR90 / PR90H
Once the encoder has been programmed, it is
imperative to close the connection cover again to
ensure IP65 protection.

Monitoring Screen
Pulses per second (PPS)
The encoder's PPS output is
shown, which can be directly
translated to frequency.
Also monitored by aPPS-scaled
dial (Hz)/125.
A
Rotation direction
CW / CCW
C
Outputs
HTL / TTL
E
Reference signal position
(Z Pulse)
Electrical (Z) vs. Mechanical
(0º to 360º) reference signal
positioning, in numerical and
graphical on the dial.
B
Alarm panel
Overload, low power, optical
failure, communications failure
and humidity alarms.
(See p. 18)
F
Incremental output
signals A / B / Z
Guidance (not real) graphical
representation for outputs
A/B/Z, in self-regulating scale.
D
REAL TIME
Press the button to activate
the real-time read monitor.
Program
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PR90 / PR90H
The PR90 encoder can be monitored
as long as the read frequency is below
30 KHz (30,000 PPS).

Alarm Panel
This interface screen shows information about the status
of the PR90 encoder's alarms and their historical register.
It updates every time verification is carried out by clicking
on the programming screen button
Encoder in perfect working order
Overload, low power, optical failure, communications failure and
humidity alert
Any malfunction in the OptoAsic illumination due to dirt
or breakage of an optical element.
- Coded disk breakage
- Dirt on the coded disk or photo sensors
- IR LED spent or fault
- Asic fault
Solution: Hohner Technical Service
Optical Error Alerts of any error that the uController detects in internal communications.
- Electromagnetic Discharges (see section "Protections", p. 6). Can cause a
communication error, which automatically resets and normalizes.
- Damage to any of the components, circuit board, fault in the ASIC or uController.
Solution: Hohner Technical Service
COM Error
Alerts of any drop in voltage or low voltage in the power circuitry.
- Constant drop in supply voltage below working limits or programmed TTL/HTL
output.
Solution: Once normal voltage is restored the PR90 regains normal functionality
Power Error
Status
During Power-Off programming an indication may register for the panel, due to the
verification of the database. It doesn't mean a wrong running.
This log can be deleted by clicking on the programming screen button
Alerts of any overload of the differential output circuits.
- Short circuit or overload that can damage the Driver power circuit.
- Fault in the Driver power circuitry.
Solution: Hohner Technical Service
Driver Error
Program
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PR90 / PR90H

Program
19
Considerations
Overload or over-heating of Driver circuitry.
Temp./Overload
Alerts of moisture or water on the circuits.
Humidity
Driver
Power is below the TTL working limits.
Low TTL
Power
Power is below the HTL working limits.
Low HTL
Differentiated earth line
The equipment is absolutely shielded against external influences, electromagnetic
fields and discharges. Even so, it is advisable to establish a differentiated earthing
circuit. Branched earthing distribution.
Connectivity
Each differential output channel is identified by the colour of the wires, which plug
directly into the differential PLC or Driver inputs. In order to preserve the quality of the
signal, this equipment must be mounted on differential resistive loads.
In case of confusion in the connection, this can be corrected without need for
disconnection, through the graphical programming interface.
Power Supply
This incremental encoder allows you to work at any voltage from 5 to 30Vdc without
the need for any change or adjustment. However, you should pay attention to the
polarity of the Vdc connection.
It is recommended in all instances to use a power supply that support loads in
excess of 2 Amp., to ensure a very low power impedance and therefore better signal
quality.
Program labelling and Re-sealing
Once you have configured the encoder, you
must disconnect the uUSB/USB cable and
close the protective cover.
It is recommended that you record the
programming data on the encoder's
"SETTINGS" label.
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PR90 / PR90H
PR90 - X X X -
PR90 - X X X -
C
PR90 - X X X -
C
PR90 - X X X -
C
1. Ø10x20mm
2. Ø 6x10mm
1. Helicoidal cable
2. 0,5m cable + con. M12 at end
3. 0,5m cable + con. M23 at end
SHAFT
CONFIGURABLE OPTIONS
CONNECTION
1. None
3. 90.1102
5. 90.1005
FLANGE
C. AA+BB+00
~ ~ ~C. 1...65536 PPR
C. HTL - TTL
Reference

DOC.ENCI.PR90X.M.002 | 07/15