WAGO 750-634 User manual
ii • General
WAGO-I/O-SYSTEM 750
I/O Modules
Copyright ©2006 by WAGO Kontakttechnik GmbH & Co. KG
All rights reserved.
WAGO Kontakttechnik GmbH & Co. KG
Hansastraße 27
D-32423 Minden
Phone: +49 (0) 571/8 87 – 0
Fax: +49 (0) 571/8 87 – 1 69
Web: http://www.wago.com
Technical Support
Phone: +49 (0) 571/8 87 – 5 55
Fax: +49 (0) 571/8 87 – 85 55
Every conceivable measure has been taken to ensure the correctness and com-
pleteness of this documentation. However, as errors can never be fully ex-
cluded, we would appreciate any information or ideas at any time.
We wish to point out that the software and hardware terms as well as the
trademarks of companies used and/or mentioned in the present manual are
generally trademark or patent protected.
Content •iii
WAGO-I/O-SYSTEM 750
I/O Modules
CONTENT
1Important Comments ................................................................................. 4
1.1 Legal Principles........................................................................................4
1.1.1 Copyright............................................................................................. 4
1.1.2 Personnel Qualification .......................................................................4
1.1.3 Intended Use ........................................................................................4
1.2 Symbols....................................................................................................5
1.3 Number Notation......................................................................................5
1.4 Safety Notes .............................................................................................6
1.5 Scope ........................................................................................................6
2I/O Modules ................................................................................................. 7
2.1 Special Modules .......................................................................................7
2.1.1 750-634 [Incremental Encoder Interface]............................................7
2.1.1.1 View................................................................................................7
2.1.1.2 Description......................................................................................7
2.1.1.3 Display Elements ............................................................................9
2.1.1.4 Schematic Diagram.........................................................................9
2.1.1.5 Technical Data ..............................................................................10
2.1.1.6 Functional Description..................................................................11
2.1.1.7 Process Image ...............................................................................11
4 •Important Comments
Legal Principles
WAGO-I/O-SYSTEM 750
I/O Modules
1 Important Comments
To ensure fast installation and start-up of the units described in this manual,
we strongly recommend that the following information and explanations are
carefully read and abided by.
1.1 Legal Principles
1.1.1 Copyright
This manual is copyrighted, together with all figures and illustrations
contained therein. Any use of this manual which infringes the copyright
provisions stipulated herein, is not permitted. Reproduction, translation and
electronic and photo-technical archiving and amendments require the written
consent of WAGO Kontakttechnik GmbH & Co. KG. Non-observance will
entail the right of claims for damages.
WAGO Kontakttechnik GmbH & Co. KG reserves the right to perform
modifications allowed by technical progress. In case of grant of a patent or
legal protection of utility patents all rights are reserved by WAGO
Kontakttechnik GmbH & Co. KG. Products of other manufacturers are always
named without referring to patent rights. The existence of such rights can
therefore not be ruled out.
1.1.2 Personnel Qualification
The use of the product detailed in this manual is exclusively geared to
specialists having qualifications in PLC programming, electrical specialists or
persons instructed by electrical specialists who are also familiar with the valid
standards. WAGO Kontakttechnik GmbH & Co. KG declines all liability
resulting from improper action and damage to WAGO products and third party
products due to non-observance of the information contained in this manual.
1.1.3 Intended Use
For each individual application, the components supplied are to work with a
dedicated hardware and software configuration. Modifications are only
permitted within the framework of the possibilities documented in the
manuals. All other changes to the hardware and/or software and the non-
conforming use of the components entail the exclusion of liability on part of
WAGO Kontakttechnik GmbH & Co. KG.
Please direct any requirements pertaining to a modified and/or new hardware
or software configuration directly to WAGO Kontakttechnik GmbH & Co.
KG.
Important Comments •5
Symbols
WAGO-I/O-SYSTEM 750
I/O Modules
1.2 Symbols
Danger
Always abide by this information to protect persons from injury.
Warning
Always abide by this information to prevent damage to the device.
Attention
Marginal conditions must always be observed to ensure smooth operation.
ESD (Electrostatic Discharge)
Warning of damage to the components by electrostatic discharge. Observe
the precautionary measure for handling components at risk.
Note
Routines or advice for efficient use of the device and software optimization.
More information
References on additional literature, manuals, data sheets and INTERNET
pages
1.3 Number Notation
Number Code Example Note
Decimal 100 normal notation
Hexadecimal 0x64 C notation
Binary '100'
'0110.0100'
Within ',
Nibble separated with dots
6 •Important Comments
Safety Notes
WAGO-I/O-SYSTEM 750
I/O Modules
1.4 Safety Notes
Warning
Switch off the system prior to working on bus modules!
In the event of deformed contacts, the module in question is to be replaced, as
its functionality can no longer be ensured on a long-term basis.
The components are not resistant against materials having seeping and
insulating properties. Belonging to this group of materials is: e.g. aerosols,
silicones, triglycerides (found in some hand creams).
If it cannot be ruled out that these materials appear in the component
environment, then additional measures are to be taken:
- installation of the components into an appropriate enclosure
- handling of the components only with clean tools and materials.
Attention
Cleaning of soiled contacts may only be done with ethyl alcohol and leather
cloths. Thereby, the ESD information is to be regarded.
Do not use any contact spray. The spray may impair the functioning of the
contact area.
The WAGO-I/O-SYSTEM 750 and its components are an open system. It
must only be assembled in housings, cabinets or in electrical operation
rooms. Access must only be given via a key or tool to authorized qualified
personnel.
The relevant valid and applicable standards and guidelines concerning the
installation of switch boxes are to be observed.
ESD (Electrostatic Discharge)
The modules are equipped with electronic components that may be destroyed
by electrostatic discharge. When handling the modules, ensure that the
environment (persons, workplace and packing) is well grounded. Avoid
touching conductive components, e.g. gold contacts.
1.5 Scope
This manual describes the Module 750-634 Incremental Encoder Interface of
the modular WAGO-I/O-SYSTEM 750.
Handling, assembly and start-up are described in the manual of the Fieldbus
Coupler. Therefore this documentation is valid only in the connection with the
appropriate manual.
750-634 [Incremental Encoder Interface] •7
View
WAGO-I/O-SYSTEM 750
I/O Modules
2 I/O Modules
2.1 Special Modules
2.1.1 750-634 [Incremental Encoder Interface]
Incremental Encoder Interface
2.1.1.1 View
B
A
C
24V
0V
13 14
SC
750-634
++
AB
0V 0V
A
C
B
shield (screen)
power jumper contacts
Fig. 2.1.1-1: Incremental Encoder Interface 750-634 g063400e
2.1.1.2 Description
The I/O module is an interface for the direct connection of any 24 V
incremental encoders. A 16-bit counter with quadrature decoder and a 16-bit
latch for the zero pulse can be read, set or activated. The counter status is
transferred rapidly and is not susceptible to faults to a PC, a PLC or a CNC via
the fieldbus.
A period measurement with a resolution of 200 ns is possible.
Sensors may be connected using the inputs A, B and C and the supply
connections 24 V and 0 V and shield (screen).
The shield is directly connected to the carrier rail.
8 •750-634 [Incremental Encoder Interface]
Description
WAGO-I/O-SYSTEM 750
I/O Modules
Input Function
A, B, Quadrature input, DC 24 V
Increment pulse signal channel A or B of the Incremental Encoder
C Zero reference input, DC 24 V
Screen (Shield) Connection for the encoder line screen
The shield is directly connected to the carrier rail.
+24V 24 V supply voltage for the module
0V Ground for the 24 V supply voltage
Individual green status LEDs indicate the signal status of the A, B and C
inputs.
Field and system level are electrically isolated.
Any configuration of the specialty modules is possible when designing the
fieldbus node. Grouping of module types is not necessary.
The field side supply voltage of 24 V and 0 V for the electronic of the sensors
and for the evaluation is derived from adjacent I/O modules or from a supply
module. The supply voltage for the field side is made automatically through
the individual I/O modules by means of power jumper contacts.
Attention
This module has no power contacts for ground (earth). For field supply with
ground (earth) to downstream I/O modules, a supply module will be needed.
Warning
The maximum current of the internal power jumper contacts is 10 A. When
configuring the system it is important not to exceed the maximum/sum
current. However, if such a case should occur, another supply module must
be added.
The module 750-634 can be used with all couplers/controllers of the WAGO-
I/O-SYSTEM 750 (except for the economy types 750-320, -323, -324 and
-327).
This description is valid for the XXXX2B02..., XXXX2B03..., XXXX2B04...
and XXXX2B1A... hardware and software versions, the schematic diagram is
tested for the version XXXX2B1A.... The version is specified in the
manufacturing number, which is part of the lateral marking on the module.
750-634 [Incremental Encoder Interface] •9
Display Elements
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.1.3 Display Elements
LED Denotation State Function
on is equivalent to U > 15 V
A
green
Quadrature
Input off is equivalent to U < 5 V
on is equivalent to U > 15 V
B
green
Quadrature
Input off is equivalent to U < 5 V
on is equivalent to U > 15 V
13 14
C
D
B
A
C
B
A
Fig. 2.1.1-2: Display
Elements g063402x C
green
Zero
reference
Input off is equivalent to U < 5 V
2.1.1.4 Schematic Diagram
AB
C
0V
24V
1
2
3
4
5
6
7
8
750-634
A
B
C
A,B,C
0V
24V
10nF
270pF
shield (screen)
Logic
Fig. 2.1.1-3:Incremental Encoder Interface 750-634 g063401e
10 •750-634 [Incremental Encoder Interface]
Technical Data
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.1.5 Technical Data
Module Specific Data
Sensor connection A, B, C
Sensor operation voltage DC 24 V
Signal voltage A, B, C (1) U > 15 V
(0) U < 5V
Counter 16 Bit binary
Cut off frequency 1 MHz
Quadrature decoder 4- fold report
Zero impulse latch 16 bits
Commands read, set, enable
Voltage supply DC 24 V (- 15 % ... + 20 %)
Current consumption max (internal) 50 mA
Current consumption max (field side) 0 mA (without sensor load)
Isolation 500 V (system/supply)
Bit width 2 x 16 bits data
1 x 8 bits Control/Status
1 x 8 bits reserved
Dimensions (mm) W x H x L 12 x 64* x 100
*from upper edge of DIN 35 rail
Weight ca. 60 g
Standards and Regulations (cf Chapter 2.2 of the Coupler/Controller Manual)
EMC-Immunity of interference acc. to EN 50082-2 (95)
EMV-Emission of interference acc. to EN 50081-2 (94)
Approvals (cf Chapter 2.2 of the Coupler/Controller Manual)
Conformity Marking
More Information
Detailed references to the approvals are listed in the document "Overview
Approvals WAGO-I/O-SYSTEM 750", which you can find on the CD ROM
ELECTRONICC Tools and Docs (Item-No.: 0888-0412)
or in the internet under:
www.wago.com !Documentation !WAGO-I/O-SYSTEM 750 !
System Description
750-634 [Incremental Encoder Interface] •11
Functional Description
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.1.6 Functional Description
Typically, incremental encoders supply two output signals for the encoder
track, both 90° offset. These signals are designated A and B.
Usually, incremental encoders have an index track in addition to the two track
signals. This index track only produces one pulse per one full encoder
revolution. This pulse and the counter reading can be used to determine the
absolute encoder position during rotation. The index pulse has a duration of a
track position pulse. We recommend to always perform the latch process in
the same rotational direction.
2.1.1.7 Process Image
Using the I/O module 750-634, a 5 byte input and output process image can be
transferred to the fieldbus coupler / controller via one logical channel. The
data sent and received is stored in 2 output bytes (D0, D1) and 5 input bytes
(D0, D1, D2, D3, D4). The output bytes D2 ... D4 are reserved and without
function. One control byte (C) and one status byte (S) are used to control the
data flow.
Attention
The representation of the process data of some I/O modules or their
variations in the process image depends on the fieldbus coupler/-controller
used. Please take this information as well as the particular design of the
respective control/status bytes from the section "Fieldbus Specific Design of
the Process Data" included in the description concerning the process image
of the corresponding coupler/controller.
Input Data Output Data
S Status byte C Control byte
D0 Counter value byte 0 (LSB) D0 Counter set value byte 0 (LSB)
D1 Counter value byte 1 (MSB) D1 Counter set value byte 1
(MSB)
D2 Signal A, B and C /
Cycle duration byte 2 (MSB)
D2 reserved
D3 Latch value byte 0 (LSB) /
Cycle duration byte 0 (LSB)
D3 reserved
D4 Latch value byte 1 (MSB) /
Cycle duration byte 1
D4 reserved
12 •750-634 [Incremental Encoder Interface]
Process Image
WAGO-I/O-SYSTEM 750
I/O Modules
Status Byte
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 0 0 OVER-
FLOW
UNDER-
FLOW
CNTSET
_ACC
RD-
PERIOD
_Q
LATC_
VAL
LATC_VAL A zero point (latch) has occurred. The data D3, D4 in the process image match the latched value
in case the cycle duration has not been requested and the bit is set. In order to reactivate the latch
input it is necessary to reset EN_LATC, to wait for the acknowledgement and to reset the bit.
RD-
PERIOD_Q
The data bytes D2, D3, D4 contain the cycle duration.
CNTSET_
ACC
Acknowledge bit for CNT_SET
Reset if CNT_SET=0
UNDER-
FLOW
In the event of an underflow (0 to 65535) of the 16-Bit counter, this bit will be set. A reset will
take place if the counter underruns two third of the measuring range (43690 to 43689) or as soon
as an overflow occurs.
OVER-FLOW In the event of an overflow (65535 to 0) of the 16-Bit counter, this bit will be set. A reset will
take place if the counter exceeds one third of the measuring range (21845 to 21846) or as soon as
an underflow occurs.
0 reserved
Control Byte
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 0 0 0 0 CNT_
SET
RD-
PERIOD
EN_
LATC
EN_LATC Zero point (input C) is activated. If the EN_LATC bit is set, the counter value will be stored in
the latch register with the first latch pulse. The following pulses have no effect on the latch
register.
RD-PERIOD The cycle duration between positive edges (input A) is measured with a resolution of 200 ns. If
the bit is set, the cycle duration will be stored in data bytes D2, D3, D4.
CNT_SET With a positive edge, the counter is initialized with the set value.
0 reserved
Signal A, B and C in Data Byte 2
The input signals A, B and C are send in data byte 2 (D2) of the input data, if
bit 1 (RD-PERIOD) in the Control byte is '0'.
Signal A, B and C in D2
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 0 Signal A Signal B Signal C 0 0 0
750-634 [Incremental Encoder Interface] •13
Process Image
WAGO-I/O-SYSTEM 750
I/O Modules
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