Hohner Automaticos PR90 Series User manual

v2.0

PR90 / PR90H
Features
Auto sensig features
Working margins
Protection
p. 5
p. 6
p. 6
p. 7
CONNECT
Requirements
Connection Steps
Connect to PC
Install software
Run the program
p. 9
p. 10
p. 10
p. 10
p. 13
PROGRAM
Overview
Programming screen
Programming steps
Monitoring screen
Troubleshooting
Considerations
p. 15
p. 16
p. 17
p. 19
p. 21
p. 22
Contents
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USER MANUAL PR90 / PR90H

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
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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
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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
7
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

connect

Requirements
uUSB/USB cable PC or Tablet-PC running on
Windows, Mac OS or Linux
Download the
programming software from the
Hohner Automáticos website
Connect
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32USER MANUAL
PR90 / PR90H
Recommended OSs: Windows 7, OS 6 o higher.
Processor Intel I3 or similar with 2Gb RAM. Free USB1 or USB2 port.
Internet connection. Virus and trojan free.
Minimum system
requirements for the
programming computer

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Connect
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32USER MANUAL
PR90 / PR90H
From the Hohner website, download the programming software required for your Operating System.
2.1 download the
programming software
Step 2: Programming software installation
Mac OS X
WINDOWS
For the PR90 programmable incremental optical encoder to work correctly, you must follow the detailed configuration instructions
below:
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

2.2 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 language and follow the instructions on screen:
Connect
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Choose language and follow the instructions on screen:
A
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PR90 / PR90H

BAutomatic alert about the installation
process
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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2
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PR90 / PR90H

Open the "Communication Port" menu on the interface and choose the corresponding
communications port (COMX), where the encoder is connected.
Once chosen, click on the button Connect in the upper bar. In approximately 2 seconds the
programming interface will fill out with the programming and monitoring screens.
3.1 configure the
COM port
menu on the interface and choose the corresponding
A
, where the encoder is connected.
B
Once chosen, click on the button Connect in the upper bar. In approximately 2 seconds the
C
AB
Step 3: Run the programming software
C
If an error message appears:
1. Close the programming software
2. Disconnect the uUSB/USB cable, and connect it again.
3. Run the programming software, click on "Refresh" and then choose the
port where the PR90 is connected from the drop-down menu.
port where the PR90 is connected from the drop-down menu.
B
Connect
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PR90 / PR90H

program

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
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.
Monitoring ScreenProgramming Screen

Programming Screen
The configurable parameters are:
Enter the desired number of pulses.
The program detects automatically the PPR value and alerts you
with red message "Incorrect PPR" if it is not a valid value.
Pulses per
revolution (PPR)
from 1 to 65.536 PPR
A
Program
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PR90 / PR90H
B
Output
type
TTL (RS422 5Vpp.
Differential)
HTL (Push-Pull
11~30Vpp. Differential)
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.
When required, select one of the output channels to switch
the differential output (channel A: from A to nA, nA to A).
Switch output
polarity
channel by channel
A / B / Z
D
Reference signal
position (Z)
0º to 360º
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.
F
E
Reference signal width
(Index, Z, 0)
90º (synchronized with A and B)
180º (synchronized with A)
Rotation
direction C
CW channel A leads B
(view from the shaft, shaft rotating clockwise)
CCW channel B leads A
(view from the shaft, shaft rotating counterclockwise

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
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
Record the configuration to the encoder
Once these options have been selected, click
on "Write Encoder" in the bottom task-bar of
the programming screen. A message window
appears, confirming that the recording process
has finished correctly.
Write
Encoder
Record configurable parameters selected to the encoder.
4.1 data record
Step 4: Program the encoder
Verify the configuration to the encoder
We can verify that the data has been recorded
correctly by clicking on "Read Encoder" in the
bottom task-bar in the programming screen.
Read
Encoder

Program
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PR90 / PR90H
4.2 configuration options
Save/Load
Also you can Save/Load the programming parameters to use them whenever you want without
having to repeat the entire selection process. The saved settings are stored in a selectable list and
may be loaded as detailed below:
Save
Load
Export/Import configuration
- Export encoder configuration in external text document
- Export all saved configurations in external text documents
- Import encoder configuration previously exported
> >
>
>

Monitoring Screen
CReference signal position
(Z Pulse)
Electrical (Z) vs. Mechanical
(0º to 360º) reference signal
positioning, in numerical and
graphical on the dial.
ON/OFF
Press the button to
activate the read monitor.
Program
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PR90 / PR90H
The PR90 encoder can be monitored with frequencies below 30 KHz (30.000 PPS).
Counter
Mechanical (0º to 360º)
disc position
B
Current
configuration A

It is imperative to close the connection cover
again to ensure IP65 protection.
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PR90 / PR90H
Program
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Once you have configured the encoder, you must close the programming software and disconnect the uUSB/USB
cable. Then close the protective cover.
5.1 close
Step 5: Close encoder and labeling
It is recommended that you write the programming data on the encoder's "SETTINGS" label.
5.2 labeling

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Program
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Troubleshooting
The PR90/PR90H does not
communicate with the PC
Computer needs the installation of USB Drivers
Your computer belongs to a Windows Domain
Unstable cable connection
Operating System Collapse
uUSB-USB cable is broken
Fail connection between the programming
software and the encoder
Wrong selection of output type (TTL - HTL) in
PR90 programmation interface
Connect the computer to internet to install USB drivers automatically.
Older versions of Windows could need a manual installation of USB drivers. Available
at http://www.encoderhohner.com/pr90
The Domain Administrator must give to computer user administration rights.
Reconnect the cable until your OS recognizes it and restard the interface.
Restart the OS and the PR90 interface.
Replace the cable.
1. Close the programming software
2. Disconnect the uUSB/USB cable, and connect it again.
3. Run the programming software and connect it with the encoder.
Review and choose the rigth programmed output type.
Problem Cause Solution
The communications port is
not listed in the programming
interface
Error “Could not write to port”
PLC/driver error message
During Power-Off programming the encoder can show a flashing red led. It doesn’t mean a wrong connection or programming error.