WAGO 750 Series Bedienungsanleitung

Fieldbus Independent

I/O Modules

2-Channel Up/Down Counter / 500

750-638(/xxx-xxx)

Manual

Version 1.0.3

ii • General

WAGO-I/O-SYSTEM 750

I/O Modules

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

E-Mail: [email protected]

Web: http://www.wago.com

Technical Support

Phone: +49 (0) 571/8 87 – 5 55

Fax: +49 (0) 571/8 87 – 85 55

E-Mail: [email protected]

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.

E-Mail: [email protected]

We wish to point out that the software and hardware terms as well as the tra-

demarks of companies used and/or mentioned in the present manual are gener-

ally 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 Counter Modules....................................................................................7

2.1.1 750-638(/xxx-xxx) [2-Channel Up/Down Counter / 500 Hz]..........7

2.1.1.1 Variations................................................................................... 7

2.1.1.2 View...........................................................................................7

2.1.1.3 Description................................................................................. 8

2.1.1.4 Display elements........................................................................9

2.1.1.5 Schematic Diagram..................................................................10

2.1.1.6 Technical Data .........................................................................11

2.1.1.7 Process Image ..........................................................................12

2.1.1.8 Data Transfer ...........................................................................13

2.1.1.9 Example: Set counter 1 on value 100 and count forward........14

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 con-

tained therein. Any use of this manual which infringes the copyright provi-

sions stipulated herein, is not permitted. Reproduction, translation and elec-

tronic and photo-technical archiving and amendments require the written con-

sent 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 modi-

fications 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 special-

ists having qualifications in PLC programming, electrical specialists or per-

sons instructed by electrical specialists who are also familiar with the valid

standards. WAGO Kontakttechnik GmbH & Co. KG declines all liability re-

sulting 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 per-

mitted 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 Kon-

takttechnik 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 inverted commas,

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 insu-

lating properties. Belonging to this group of materials is: e.g. aerosols, sili-

cones, triglycerides (found in some hand creams).

If it cannot be ruled out that these materials appear in the component envi-

ronment, 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 envi-

ronment (persons, workplace and packing) is well grounded. Avoid touching

conductive components, e.g. gold contacts.

1.5 Scope

This manual describes the Digital Input Module 750-638(/xxx-xxx)

2-Channel Up/Down Counter / 500 Hz 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.

750-638(/xxx-xxx) [2-Channel Up/Down Counter / 500 Hz]• 7

Variations

WAGO-I/O-SYSTEM 750

I/O Modules

2 I/O Modules

2.1 Counter Modules

2.1.1 750-638(/xxx-xxx) [2-Channel Up/Down Counter / 500 Hz]

2-Channel Up/Down Counter DC 24 V, 16 Bit, 500 Hz

2.1.1.1 Variations

Item-No. Designation Description

750-638 2-Channel Up/Down

Counter / 500 Hz

2-Channel Up/Down Counter DC 24 V,

500 Hz

750-638/025-000 2-Channel Up/Down

Counter / 500 Hz/T

2-Channel Up/Down Counter DC 24 V,

500 Hz

extended temperature range from –20 °C to

+60 °C

2.1.1.2 View

13 14

750-638

+DI 2

Power jumper contacts

Data contacts

Function

24V

-DI 2

Function

+DI 1

DI 2

DI 1

-DI 1

Counting

positive

impulses

Counting

negative

impulses

Potential

free

signal

Fig. 2.1.1-1: 2-Channel Up/Down Counter 750-638 g063800e

8 • 750-638(/xxx-xxx) [2-Channel Up/Down Counter / 500 Hz]

Description

WAGO-I/O-SYSTEM 750

I/O Modules

2.1.1.3 Description

The 2-channel counter module 750-638 counts 24 V DC binary pulses from

digital field devices (sensors, switches, etc.) forward and backwards.

This I/O module has two independent 16 bit up/down counters. One field de-

vice per channel can be directly connected independent of the wiring.

The counters are only equipped with terminals on the field side. Since both

counters are potential free, the external 24 V pulse signals can be directly con-

nected to –DI 1 and +DI 1 or -DI 2 and +DI 2.

By using the ground potential of the module, each counter can count either po-

sitive or negative pulses independent of the external module wiring.

By connecting, for example, two 2-conductor field devices, one to the upper

signal input +DI 1 or +DI 2 and the other to the 24 V connection, as well as

connecting the 0 V signal and the corresponding lower signal –DI 1 or –DI 2

in a bridged mode, positive voltage pulses can be identified and counted via

the 24 V signals sent to + DI 1 or +DI 2.

By connecting, for example, two 2-conductor field devices, one to the lower

signal input -DI 1 or -DI 2 and the other to the 0 V connection, as well as con-

necting the 24 V signal and the corresponding upper signal +DI 1 or +DI 2 in

a bridged mode, negative voltage pulses can be identified and counted via the

0 V signals sent to -DI 1 or -DI 2.

Channel-wise mixed wiring of the counters is possible (counting with poten-

tial free signal, with positive and negative pulse).

Each I/O module delivers 3 bytes per channel.

Two of them are delivered by the count data, which is transmitted to the con-

trol system as a 16-bit value via the fieldbus. The third byte is a control/status

byte, which is used for the bidirectional data exchange of the bus module with

the upper level control system.

The control byte is transmitted from the control system to the I/O module and

the status byte from the I/O module to the control system.

The control bytes are used to set, reset and lock the counters. Defining the

counting direction of the counters (incrementing or decrementing the count) is

also possible via setting within the control byte.

The content of the control byte is acknowledged by the status byte after the

preset counter function has been processed.

An individual green status LED indicates the presence of a counting pulse at

the channels. Communication with the coupler/controller is indicated by an

additional green function LED.

Field and system levels are electrically isolated.

750-638(/xxx-xxx) [2-Channel Up/Down Counter / 500 Hz]• 9

Display elements

WAGO-I/O-SYSTEM 750

I/O Modules

The individual I/O modules can be arranged freely when designing the field-

bus node. A block-wise arrangement of the modules is not required.

The 24 V voltage supplying the field level and the 0 V potential is provided to

the up/down counter module either using a preconnected I/O module or a sup-

ply module. Power connections are made automatically from module to mod-

ule via the internal power contacts when the input modules are snapped onto

the DIN rail.

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 cur-

rent. However, if such a case should occur, another supply module must be

added.

The up/down counter module can be operated with all couplers/controllers of

the WAGO-I/O-SYSTEM 750 (except for the digital only versions 750-320,

750-323, 750-324 and 750-327).

2.1.1.4 Display elements

LED Channel Designation State Function

off Counter 1: no communication with

coupler/controller

green

Function

DI 1 on Counter 1: communication with

coupler/controller

off Counter 1: signal input off

green

Status

DI 1 on Counter 1: DC 24 V signal input on

off Counter 2: no communication with

coupler/controller

green

Function

DI 2 on Counter 2: communication with

coupler/controller

off Counter 2: signal input off

13 14

Abb. 2.1.1-2: Display

elements g063802x

green

Status

DI 2 on Counter 2: DC 24 V signal input on

10 •750-638(/xxx-xxx) [2-Channel Up/Down Counter / 500 Hz]

Schematic Diagram

WAGO-I/O-SYSTEM 750

I/O Modules

2.1.1.5 Schematic Diagram

+DI 1

-DI 1 -DI 2

+DI 2

24V

+DI

-DI

270pF

10nF

Function

Logic

24V

750-638

Fig. 2.1.1-3: 2-Channel Up/Down Counter 750-638 g063801e

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