Siemens SIMATIC CM35 User Manual

SIMATIC
Counter Module CM35

Manual Release 06/20 00

Foreword, Table of Contents

User’s Information

CM35

Counter Module

Manual

This manual describes
the counter module with
order no. 6AT1 735-0AA01-0AA0

Product Overview

Function Description

Commissioning

Operating Modes

Data Communication with the
CM35

Pulse Counter Operating Mode

Period Duration Measurement
Operating Mode

Timer Operating Mode

Positioning Operating Mode

1

2

3

4

5

6

7

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Appendices

Literature

EC Declaration of Conformity

Glossary

A

B

Release 06/2000

Notes on safety

!

!

!

This manual contains notes which you must adhere to for your own personal safety and to
avoid property damage. These notes are highlighted with a warning triangle showing the
degree of danger as shown below.

Danger

Means death, severe personal injury or significant property damage will occur when the
appropriate precautionary measures are not taken.

Warning

Means death, severe personal injury or significant property damage may occur when the
appropriate precautionary measures are not taken.

Caution

Means minor personal injury or property damage may occur when the appropriate precautio­nary measures are not taken.

Note

Highlights important information about the product, its handling or a particular portion of
the documentation which requires special attention.

Qualified
personnel

Use as intended

!

Brands

Passing on tothird parties, reproduction, utilization and revelation of
this document is not permitted without express permission.Violators
will be liable for damages.All rights are reserved, in particular rights
created by a patent grant or registration of a utility model or design.

Siemens AG
Automation and Drives
Motion Control Systems
Frauenauracher Strasse 80
D-91056 Erlangen

Siemens Aktiengesellschaft

Only qualified personnel may commission and operate the device. For the purpose of the
safety notes in this manual, qualified personnel are those persons who are authorized to com­mission, ground and tag devices, systems and electrical circuits in accordance with safety
standards.

Adhere to the following.

Warning

The device may only be used for the individual applications included in the catalog and
technical description. When used with devices and components of other manufacturers,
these devices and components must be approved or recommended by Siemens.

Correct and safe operation of the product is dependent on proper transportation, storage,
setup and installation and careful operator control and maintenance.

SIMATICR is a registered brand of SIEMENS AG.

The other designations in this publication may be brands whose use by third parties may
violate the rights of the owners.

Disclaimer of liabilityCopyright E Siemens AG 1997--2000, All rights reserved

Although we have checked the contents of this manual for agree­ment with the hardware and software described, full agreement can­not be guaranteed. The information in this manual is checked at
regular intervals and necessary corrections included in the next
release.Your ideas and suggestions are welcome.

E Siemens AG 1997--2000
Subject to change without prior notice

Foreword

Purpose of this
manual

Contents of this
manual

Target readers

Area of validity of
this manual

Hardware and soft­ware prerequisites
for this manual

This manual describes all steps required for the effective use of the CM35
counter module. It presents the functionality of the CM35 concisely and log­ically while you are familiarizing yourself with the module.

This manual describes the hardware and software of the CM35. It provides an
introduction and can also be used as a reference work.

This manual has been written for the following circles of readers.

S Maintenance personnel

S Programmers

S Commissioning personnel

S Service personnel

This manual describes the functions of the CM35 counter module as t hey
were at the time this manual was published. We reserve the right to modify
the functionality of the CM35. These c hanges will be described in product
information sheets.

This manual describes:

S The CM35 counter module (order no. 6AT1 735-0AA01-0AA0)

S The configuration package (order no. 6AT1 735-0DA01-0YA0)

If you are using the previous version of the CM35 counter module (order no.
6AT1 735-0AA00-0AA0), please use the configuration package with the or­der number 6AT1 735-0DA00-0YA0.

Caution:

The CM35 counter module (order no. 6AT1 735-0AA01-0AA0) is not com-
patible with the CM35 counter module (order no. 6AT1 735-0AA00-0AA0).

Additional source
of information

CM35 Counter Module
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The appendix lists additional sources of information on the subject of
SIMATIC S7--300.

i

For

eword

Aids to finding
information in this
manual

Standards

This manual offers the following aids to help you find the special information
you want.

S A comprehensive table of contents is located at the beginning of the

manual.

S All chapters provide a left--hand column with an overview of the contents

of the particular section.

S At the end of the manual, you will find a glossary defining important

terms as they are used in the manual.

The SIMATIC S7--300 programmable controller meets the requirements of
standard IEC 1131.

Contact your Siemens representative at your nearest Siemens office or the
SIMATIC hotline (telephone no. 0911/895-7000 or fax no. 0911/895-7002)
for questions on the products described in this manual for which you are un­able to find answers.

For questions or comments on the manual itself, please fill out the response
sheet at the end of the manual, and return it to the address indicated. We
would also appreciate your including your personal opinion of the manual on
the response sheet.

We offer courses to make it easier to get started with the SIMATIC automa­tion system. Please contact your regional training center or the central train­ing center in Nuremberg (tel. no. 0911/895-3154).

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CM35 Counter Module

Table of Contents

1 Product Overview 1-1.......................................................

1.1 Overview 1-2.......................................................

1.2 Use on Programmable Controllers and Automation

Systems 1-3.......................................................

1.3 Hardware 1-6......................................................

1.4 Software 1-8.......................................................

1.5 Technical Data 1-9..................................................

2 Function Description 2-1....................................................

2.1 Function Overview 2-2...............................................

2.2 Pulse Counter 2-3..................................................

2.3 Period Duration Measurement 2-3.....................................

2.4 Timer 2-3..........................................................

2.5 Positioning 2-3.....................................................

3 Commissioning 3-1.........................................................

3.1 Installation of the CM35 3-3..........................................

3.1.1 Mounting the CM35 3-3..............................................

3.1.2 Mounting and Demounting the CM35 3-6...............................

3.2 Wiring the CM35 3-8................................................

3.2.1 Connection Allocation of the 25--Pin Sub D Socket 3-10...................

3.2.2 Connection Allocation of the 15--Pin Sub D Socket 3-12...................

3.3 Configuration and Parameterization 3-13................................

3.3.1 Installation of the Object Manager for STEP 7 3-14.......................

3.3.2 Central Integration into the SIMATIC S7-300 3-15........................

3.3.3 Distributed Integration into the SIMATIC S7 3-16.........................

3.3.4 Distributed Integration into the SIMATIC S5 3-17.........................

3.3.4.1 Hardware Prerequisites 3-17..........................................

3.3.4.2 Configuration 3-18...................................................

3.4 Reactions during Startup and in Case of Errors 3-23......................

4 Data Communication with the CM35 4-1......................................

4.1 Overview 4-2.......................................................

4.2 Parameterization 4-3................................................

4.2.1 Parameterization with SFC 55 (Only SIMATIC S7) 4-6...................

4.2.2 Parameterization via Direct I/O Accesses (Only SIMATIC S5) 4-8..........

4.3 Programming 4-11...................................................

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4.3.1 Controlling the Channels 4-11.........................................

4.3.2 Controlling the Digital Outputs 4-13.....................................

4.3.3 I/O Write Accesses 4-14..............................................

4.3.4 Reading the Data 4-15................................................

4.3.5 Evaluating a Hardware Interrupt in OB 40 4-17...........................

4.4 Overview of the Allocation of the Address Area and

Sequence of the Evaluation 4-19.......................................

5 Pulse Counter Operating Mode 5-1..........................................

5.1 Function Description 5-2.............................................

5.2 Parameterization 5-4................................................

5.2.1 Description of the Parameterization Data 5-4...........................

5.2.2 Structure of the Parameter Blocks 5-11.................................

5.3 Starting and Stopping the Counting Channels 5-14.......................

5.4 Controlling the Digital Outputs 5-15.....................................

5.5 Hardware Interrupt Evaluation 5-17.....................................

5.6 Reading the Counting Values 5-18.....................................

6 Period Duration Measurement Operating Mode 6-1............................

6.1 Function Description 6-2.............................................

6.2 Parameterization 6-4................................................

6.2.1 Description of the Parameter Data 6-5.................................

6.2.2 Structure of the Parameter Block 6-6..................................

6.3 Starting and Stopping the Measuring Channels 6-7......................

6.4 Controlling the Digital Outputs 6-8.....................................

6.5 Hardware Interrupt Evaluation 6-9.....................................

6.6 Reading the Measured Values 6-10.....................................

7 Timer Operating Mode 7-1..................................................

7.1 Function Description 7-2.............................................

7.2 Parameterization 7-3................................................

7.2.1 Description of the Parameter Data 7-4.................................

7.2.2 Structure of the Parameter Blocks 7-6.................................

7.3 Starting and Stopping the Timers 7-9..................................

7.4 Controlling the Digital Outputs 7-10.....................................

7.5 Hardware Interrupt Evaluation 7-12.....................................

7.6 Reading the Status 7-14..............................................

8 Positioning Operating mode 8-1.............................................

8.1 Function Description 8-2.............................................

8.2 Parameterization 8-7................................................

8.2.1 Description of the Parameter Data 8-8.................................

8.2.2 Structure of the Parameter Blocks 8-10.................................

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8.3 Starting and Stopping the Axes 8-14....................................

8.4 Controlling the Digital Outputs 8-16.....................................

8.5 Hardware Interrupt Evaluation 8-18.....................................

8.6 Reading the Actual Positions 8-19......................................

A Literature A-1..............................................................

B EC Declaration of Conformity B-1............................................

Glossary Glossary-1..........................................................

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Product Overview

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oduct Overview

P

1.1 Overview

Function scope

Digital inputs and
outputs

Application areas

The CM35 is a multi--channel counter module which can be used to imple­ment various tasks in the following operating modes.

S Pulse counter

S Period duration measurement

With 8 channels

S Timer

S Positioning With 4 axes

The selected operating mode applies to all channels of the CM35. The func­tion parameters can be set separately for each channel.

The counter module has eight floating digital inputs and outputs which are
used for the inputs and outputs of the counting channels. The signals are led
out via two sub D sockets on the front.

When not used for the operating mode, the outputs can be used as desired by
the user program as process I/O.

The m odule can be used for position encoding and positioning as well as in
the following systems.

-- Proportioning systems

-- Filling systems

Use with program­mable controllers
and automation
systems

-- Packaging systems

-- Sorting systems

-- Systems with defined time intervals

The counter module can be used centrally on the SIMATIC S7--300 and as
distributed I/O on the modular ET 200M I/O device on the SIMATIC S7 and
SIMATIC S5. The conventional configuration procedures of STEP 7 or
COM PROFIBUS (for SIMATIC S5) are used for the configuration.

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1.2 Use on Programmable Controllers and Automation Systems

Central integration
into the
SIMATIC S7-300

Distributed in­tegration into the
SIMATIC S7

The full function scope of the module can be utilized. System function
SFC 55 is available for the parameterization. See reference manual /235/.

Possible

Modules

Example:
CPU 312 IFM
CPU 313
CPU 314

:

CPU 614

Sample Configuration

PS

CPU

CM35

The full function scope of the module can be utilized. Parameterization is
performed with system function SFC 55.

Possible

Modules

Master:

-- S7-CPU with
DP interface

-- CP 443-5 Ext.

-- IM 467

Sample Configuration

S7-300

CPU 315-2 DP

CM35 Counter Module
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Slave:

-- IM 153-1

-- IM 153-2

PS

PROFIBUS-DP

ET 200M

PS CM35IM 153-1

1-3

r

oduct Overview

P

Distributed in­tegration into the
SIMATIC S5

Since no hardware interrupts are triggered on the SIMATIC S5 by
PROFIBUS--DP, the function scope is limited. Only the operating modes
²period duration measurement² and ²timer² can be used.

Parameterization is performed via I/O direct accesses.

Possible

Modules

Master:

-- P L C
S5-95U(-MA)

-- PLC S5-115U

-- PLC S5-135U

-- PLC S5-155U

via IM 308-C

Slave:

-- IM 153-1

-- IM 153-2

Sample Configuration

IM 308-C

S5-115U

PROFIBUS-DP

ET 200M

IM 153-1

PS CM35IM 153-1

Prerequisites for the coupling are an IM 153--1 (MLFB no. 6ES7
153--1AA02--0XB0 or later) and CM35 modules (MLFB no. 6AT1
735--0AA01--0AA0, release status 4 or later).

Up to 7 CM35 modules can be connected with each IM 153--1 interface.

Exception: Maximum of one CM35 per IM 153--1 when distributed

connection to a SIMATIC S5--95U/master DP is used

Maximum of 8 CM35s per IM 153--1 when distributed
connectiontoaSIMATICS7(CPU318--2DP,
CPU 417--4 DP, CP 443--5 Ext., IM 467) is used

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CM35 Counter Module

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IM 153-2

SIMATIC S7-400H
and active back­plane bus,
SIMATIC PCS 7

Prerequisites for the coupling are an IM 153--2 (MLFB no. 6ES7
153--2AA01--0XB0, release status 2 or later) and CM35 modules (MLFB no.
6AT1 735--0AA01--0AA0).

CM35 modules (MLFB no. 6AT1 735--0AA01--0AA0, release status 4 or
later) are required for the IM 153--2 interfaces (MLFB no. 6ES7
153--2AA02--0XB0, release status 5 or later).

Up to 7 CM35 modules can be connected to each IM 153--2 interface.

Exception: Maximum of one CM35 per IM 153--2 when distributed

connection to a SIMATIC S5--95U/master DP is used

Maximum of 8 CM35s per IM 153--2 when distributed
connectiontoaSIMATICS7(CPU318--2DP,
CPU 417--4 DP, CP 443--5 Ext., IM 467) is used.

The present version of the CM35 does not support:

S The setup with active bus modules for ET 200M

S Use on high--availability programmable controllers with redundant setup

(SIMATIC S7-400H)

S Use with SIMATIC PCS 7

For additional information, contact the SIMATIC hotline.

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1.3 Hardware

View of the
module with
front door
closed

SF

CM35

Counter Module

x2

34

xxxxxxx

Module name

SF LED

Front door

Release status

Order number

(6AT1 735-0AA01-0AA0)

View of the
module with
front door
open

Figure 1-1 View of the front with front door closed

SF

Digital inputs

25-- pin sub D socket

Digital outputs

15-- pin sub D socket

Figure 1-2 View of the front with front door open

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CM35 Counter Module

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Front plug
connector

SF LED

The CM35 is equipped with the following front plug connectors for connec­tion of the process I/O.

S 25--pin sub D socket for connection of the input signals (digital inputs)

The inputs are individually isolated from one another and can be used
with a 5 V or 24 V signal level.

S 15--pin sub D socket with digit al outputs and the connection for the exter-

nal supply voltage for the digital outputs

The outputs are isolated against the module logic, but are not isolated
among one another. They are powered with a supply voltage of 24 V DC.

The red SF LED on the front indicates that the module is not ready for opera­tion. This LED goes off when a valid parameterization was transferred to the
module after a warm restart or hot restart and the BASP/OD signal is no lon­ger active.

The CM35 does not support diagnostic alarms and the STEP 7 diagnostic
information.

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1.4 Software

Module
firmware

The firmware of the module offers four different operating modes.

S Pulse counter

Continuous counting with maximum counting frequencies of 10 kHz

S Period duration measurement

Measurement of period durations between 1 msec and 2.6 sec with a reso­lution of 1% on all 8 channels (reference frequencies: 100 kHz, 50 kHz,
25 kHz)

S Timer

8 separate switch--on times from 10 msec to 278 min

S Positioning

31

4 axes with a max. of 2
2kHz

The desired operating mode is selected via the configuration user interface.

Note

The following applies when the CM35 is used to acquire frequencies.

increments up to a top frequency of

S For lower frequencies: ²period duration measurement² operating mode is

recommended (the pe r iod duration can be converted to a frequency).

S For higher frequencies: ²pulse counting² operating mode is recom-

mended.

Software

Depending on use on the SIMATIC S7 or decentralized on the SIMATIC S5,
configuration of the module is performed with the ²SIMATIC Manager² or
with ²COM PROFIBUS.²

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CM35 Counter Module

1.5 Technical Data

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oduct Overview

Digital inputs

Type Pulse counter

Number 8

System Incremental

Limit frequency Max. of 10 kHz

Minimum pulse duration
(for high and low)

Signal level S 24 Volt signals:

40 msec

-- Signal

-- Signal

²H²:15to30Volt
²L²:-3to+5Volt

S 5 Volt signals:

-- Signal

-- Signal

Input current S For 24 V and ²H² signal

-- Typical 4.7 mA

²H²:2.4to6Volt
²L²: --0.6 to 0.8 Volt

S For 5 V and ²H² signal

-- Typical 10 mA

Potential isolation Yes

Maximum signal rise time From ²L² to ²H²: typ. 10 msec

From

²H² to ²L²: typ. 15 msec

Permissible cable length (shielded) For 24 V 25 m

For 5 V 5 m

Connection 25--pin sub D socket

Digital outputs

Number 8

Signal level 24 Volt, P--switching

Output current (short--circuit proof) Per DO: Max. of 0.5 A

Total current: Max. of 4 A

Switching frequency Max. of 10 Hz with ohmic load

8 Hz with lamp load

Max. of 0.5 Hz with inductive load

Cable length Max. of 100 m

Connection 15--pin sub D socket

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Other

MLFB no.

Input voltage +5 V via P bus

Current consumption Typ. 0.150 A

UL/CSA/FM No

CM 35 counter module: 6AT1 735-0AA01-0AA0 or later

Configuration package: 6AT1 735-0DA01-0YA0 or later

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CM35 Counter Module

Function Description

2

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F

unction Description

2.1 Function Overview

Table 2-1 Operating modes

Operating

Function Limit

Mode

Pulse
counter

Counting up from
0 to 65535 with
comparison function

Counting down from
65535 to 0 with
comparison function

Period dura­tion mea­surement

Measuring the time
between 2 falling
edges of the applied
signal

Timer Outputting the speci-

fied switching times
via the digital outputs

Positioning Acquiring the actual

position of axes via
incremental
encoder (track A/B)
and comparing it with
the setpoint

Fre-

quency

Control the

Digital

Outputs Via ...

Hardware

Interrupt

for ...

Use

on

S5 Master

or

Standard

Master

10 kHz Operating mode/

CPU control

Comparison
value

Not possible

is reached.

1kHz CPU control - Possible

- Operating mode/
CPU control

Expiration of
the

Possible

switch--on
time

2kHz Operating mode/

CPU control

Setpoint is
reached.

Not possible

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CM35 Counter Module

2.2 Pulse Counter

F

In this operating mode, the CM35 continuously counts up or down between 0
and 65535 when the counter is enabled.

-- When the counting value reaches the upper counting limit while
counting up and another pulse arrives, the counting value jumps to the
lower counting limit and counts from there without losing a pulse.

-- When the counting value reaches the lower counting limit while
counting down and another pulse arrives, the counting value j umps to
the upper counting limit and counts from there without losing a pulse.

2.3 Period Duration Measurement

In this operating mode, the CM35 acquires low frequencies with the aid of
period duration measurement.

The CM35 measures the e xact time between two falling edges of the count­ing signal by counting the pulses of an internal, precision--quartz reference
frequency.

unction Description

2.4 Timer

In timer operating mode, precisely defined switch-- on times of 10 millisec­onds to 278 minutes can be implemented for every digital output.

2.5 Positioning

In this operating mode, the CM35 supports controlled positioning with a
switch--off point.

Position acquisition is performed with an incremental encoder whose pulses
are acquired by the module with the correct sign in the traversing area from
–2,147,483,648 to +2,147,483,647.

Two digital outputs are available for each of the four channels. These out­puts are addressed by the CM35 based on the direction.

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unction Description

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CM35 Counter Module

Commissioning

This chapter provides all the information you will need for commissioning,
including mounting, connection, configuration and parameterizati on.

3

General safety
notes

!

!

Adherence to these safety notes is mandatory. Non--adherence will void the
warranty!

Warning

Unqualified manipulations on the device/system or non--adherence to the
warnings on the cabinet of the device/system can cause severe personal in­jury or property damage. Only qualified personnel may perform work on this
device/system.

Note

This device has been developed, manufac tured, tested and documented in
accordance with pertinent safety standards. Under normal conditions, the
device does not endanger property or human health.

Caution

Commissioning is prohibited until it has been determined that the machine in
which these components are to be installed meets the regulations of guide­line 89/392/EWG.

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Note

The following rules must be adhered to ensure that EU guidelines
89/336/EWG have been met.

S The setup guidelines and safety notes in the manuals and supplementary

documentation must be adhered to for both the programmable controller
and the CM35.

S To achieve maximum EMC immunity, all signal lines to the CM35 must

be shielded and applied to a grounded shield retainer rail.

S On the CM35, the cable shield m ay not be applied to the sub D plug con-

nector.

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CM35 Counter Module

3.1 Installation of the CM35

s

s

3.1.1 Mounting the CM35

Commi

ioning

Preparation

Slot

Before physical installation is begun, the appropriate safety precautions must
be taken and the following points complied with or clarified.

S Was the module still in its original packaging?

S Check the delivery for transportation damages.

S Check the delivery for completeness.

If you discover damages or deficiencies, please contact
your SIEMENS representative.

The S7 interface of the CM35 corresponds to the serial I/O bus (P bus) of
the SIMATIC S7-300.

All slots on the SIMATIC S7 which can be assigned to signal modules (SM)
are available to the CM35.

For additional information, see the manual of the SIMATIC S7--300.

The maximum numbe r of CM35 modules which can be installed on SIMA­TIC programmable cont rollers depends on the following fac tors.

S Maximum number of modules in the central rack/expansion unit or the

modular ET 200M I/O device

S Memory requirements of the S5/S7/C7 CPU

S Maximum permissible current consumption (5 V) from the S7 backplane

bus

Physical
setup

Installation
position

CM35 Counter Module
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For information on possible physical setups and how to configure, see
manual /70/.

Horizontal installation is recommended. When vertical installation is used,
remember that environmental temperatures are restricted (max. of 40° C).

3-3

100

0mA

A

ET200Mwit

h

p

DPmaste

r

Commi

s

s

Table 3-1 Technical data of the SIMATIC

Type of Setup Central Setup Distributed Setup

CPU Work memory of the

CPU 312 IFM 6 8MOD No multi--row setup possible 7 MOD per ET 200M

CPU 313 12 800 m

CPU 314 24 8MOD 8+8MOD 1 · 8MOD

ioning

CPU
in Kbytes
(status 6/2000)

Number of Modules Which Can Be Installed on the Central Rack/Ex­pansion Unit
Current (5 V) from the S7 Backplane Bus

1-row 2-row Max. of

4-row

Central rack IM 365 1 · IM 360

3 · IM 361

ET 200M

CPU 314 IFM 32

CPU 315 48

CPU 315-2 DP 64

CPU 316 128

CPU 318-2 DP 512,

of these max. of

256 for code

256 for data

CPU 31X-2 DP

CPU 41X-X DP

C7-6XX DP

S5-1X5U with

IM 308-C

MOD = CM35 modules

Depends on the CPU
being used

1200 mA To tal of

1100 mA

- - -

1 · 850 mA

plus

3 · 8MOD

3 · 800 mA

Exception:

With CPU
314 IFM:
Total of up t o
31 modules

Exceptions:
Max. of 8 MOD per

:

- CPU 318-2 DP

- CPU 417-4 DP

- CP 443-5 Ext.

- IM 467
Max. of 1 MOD per
ET 200M with:
SIMATIC S5-95U/
DP master

The number of slave
stations (ET 200M) per
CPU depends on the
CPU being used.

Example:
CPU 315-2 DP: Max.
of 32 slave stations
(ET 200M) per CPU

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CM35 Counter Module

Commi

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Table 3-2 Requirements on the CM35 side

ioning

With Use of Current requirements (5 V) from

S7 Backplane Bus

m · CM35 m · 150 mA

m = Number of CM35 modules

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3.1.2 Mounting and Demounting the CM35

Rules

Required tools

No special protective measures (ESD guidelines) are required for installation
of the CM35.

You will need a 4.5 mm screwdriver to mount and de mount the CM35.

Note

Make absolutely sure that cable installation meets EMC regulations (also
inside the cabinets).

Avoid installing cables next to power cables, and shield the cables in the
manner described above.

Two--sided shield application is usually recommended. When interference is
primarily low--frequency, one--sided shield application can be more advanta­geous.

Adhere to the grounding concept of the SIMATIC S7--300 to avoid problems
with potential.

The setup guidelines (AR) of the SIMATIC S7 (see manual on setting up
S7--300 programmable controllers and CPU data) must be adhered to during
all mounting steps, and the following instructions must be performed in the
order specified.

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How to install

How to remove/
replace modules

For how to mount the modules on the system, see manual /70/ or /140/.
A simplified version of installation is given here.

1. Turn off all voltages on the SIMATIC S7, secure against switch--on, and
label.

2. Make protective conductor connection, or check it. See AR.

3. Mount shield connecting element (SAE).

-- The shield connecting element must be mounted directly under the

slot of the CM35 on the mounting rail.

-- Each cable to be connected to the CM35 requires a shield clamp on

the shield rail of the SAE.

4. Plug in bus connector. See AR.

-- A bus connector is supplied with each CM35. Insert the bus connector

on the module occupying the slot to the left of the CM35.

5. Hang in CM35. See AR.

6. Secure CM35 with screw. See AR.

7. Label CM35. See AR.

For how to set up/replace modules in the system, see manual /70/ or /140/.
A simplified version of removal is given here.

1. Switch the CPU to STOP.

2. Turn off the power supply.

3. Release the front plug connector, and disconnect it.

4. Release the mounting screw on the module.

5. Swivel the module out of the mounting rail, and re move it.

6. If necessary, install the new module.

For more information on removing the modules, see manuals /70/ and /140/.

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3.2 Wiring the CM35

Digital inputs

Digital outputs

Shield clamps

The 8 counting inputs (channels) of the CM35 are availa ble on a 25--pin sub
D socket on the front of the module.
Each counting input has separate connections for reference pote ntial
(ground), and 5 V and 24 V signals. To prevent malfunctions, only one of the
two signal voltages may be wired at a time.

The encoder must be powered by an external voltage source.

The 8 outputs of the CM35 are available on a 15--pin sub D socket on the
front of the module. A load power supply of 24 V DC must also be connected
there which is able to continuously supply the sum of the required output
currents.

The outputs are P switches which can handle a load current of 0.4 A. They
are protected against overload and short circuits.

The size of the shield clamp depends on the diameter of the cable.

To mount a cable with the shield clamp, bare the shield by cutting out
approximately 1.5 cm of the cable insulation at the appropriate location on
the cable.

2

Shield clamp

Shield rail

(fixed)

1

Figure 3-1 Mounting the shield clamps

Caution

!

Do not damage the braiding of the shield when baring the cable.

When applying the shield to all cables connected to the CM35, remember to
leave enough cable between the shield connecting element and the CM35 so
that the CM35 can be removed with all cables connected.

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Figure 3-2 Shield connecting element

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Shield connecting
element

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3.2.1 Connection Allocation of the 25-- Pin Sub D Socket

Wiring of the oper­ating modes pulse
counter,
period duration
measurement and
timer

13

25

14

1

The i nputs must be wired in accordance with table 3-3 for modes pulse
counter, period duration measurement and timer.

Table 3-3 Wiring

Signal Voltage

5V 1 Counting pulse 20

24 V 1 Counting pulse 1

Channel Encoder

Signal

Ground 14

2 Counting pulse 2

Ground 21

3 Counting pulse 9

Ground 3

4 Counting pulse 16

Ground 10

5 Counting pulse 23

Ground 17

6 Counting pulse 5

Ground 24

7 Counting pulse 12

Ground 6

8 Counting pulse 19

Ground 13

Ground 14

2 Counting pulse 8

Ground 21

3 Counting pulse 15

Ground 3

4 Counting pulse 22

Ground 10

5 Counting pulse 4

Ground 17

6 Counting pulse 11

Ground 24

7 Counting pulse 18

Ground 6

8 Counting pulse 25

Ground 13

Connection to Pin ...

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Wiring for operat­ing mode
positioning

13

25

14

1

When ²positioning² mode is used, the inputs must be wired in accordance
with table 3-4.

Table 3-4 Wiring for ²positioning² operating mode

Signal Voltage

5V 1 A 20

24 V 1 A 1

Axis Tr ack Connection to Pin ...

B 2

Ground 14 / 21

2 A 9

B 16

Ground 3/10

3 A 23

B 5

Ground 17 / 24

4 A 12

B 19

Ground 6/13

B 8

Ground 14 / 21

2 A 15

B 22

Ground 3/10

3 A 4

B 11

Ground 17 / 24

4 A 18

B 25

Ground 6/13

Note

Connect the two ground connections for an axis.

Example of an encoder connection

-- Incremental encoder with 5 V supply

-- A x i s 1

Þ Track A: Pin 20

Track B: Pin 2
Ground: Pin 14 + pin 21 (connect t hese two)

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3.2.2 Connection Allocation of the 15-- Pin Sub D Socket

Table 3-5 Allocation of the 15 --pin sub D socket

15

14

Pin

1 VCC1 IN Load voltage 24 V

2 VCC1 IN Load voltage 24 V

3 O1 OUT Digital output 1 Axis 1, forwards

4 O2 OUT Digital output 2 Axis 1, backwards

8

1

5 O3 OUT Digital output 3 Axis 2, forwards

6 O4 OUT Digital output 4 Axis 2, backwards

7 GND 2 IN Ground load voltage for digital outputs

8 GND 2 IN Ground load voltage for digital outputs

9 VCC1 IN Load voltage 24 V

10 VCC1 IN Load voltage 24 V

11 O5 OUT Digital output 5 Axis 3, forwards

12 O6 OUT Digital output 6 Axis 3, backwards

13 O7 OUT Digital output 7 Axis 4, forwards

14 O8 OUT Digital output 8 Axis 4, backwards

15 GND 2 IN Ground load voltage for digital outputs

Signal Input/

Output

Pulse Counter,
Period Duration
Measurement,
Timer

Function for Mode

Positioning

The connections for 24 V load voltage and for ground load voltage are con­nected internally.

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3.3 Configuration and Parameterization

Configuration and parameterization of the CM35 depends on the system on
which the module is to be used.

Table 3-6 Overview of configuration and parameterization

ioning

Central Integration into

the SIMATIC S7-300

Configuration tool STEP 7, HW Config COM PROFIBUS

Module address Depends on slot or selecta-

ble as desired

(depends on CPU)

Setting the operating mode During configuration

Parameterization With SFC 55 “WR_PARM” Via I/O direct accesses

Configuration with
STEP 7

The object manager from the included data medium must be installed first
(see chapter 3.3.1) so that STEP 7 will be able to recognize the CM35 during

Distributed Integration

into the SIMATIC S7

Can be selected as desired

Distributed Integration

into the SIMATIC S5

configuration.

Configuration with
COM PROFIBUS

Parameterization

The current GSD files must be loaded to subdirectory GSD so that
COM PROFIBUS is able to recogniz e the CM35 during configuration.

Parameterization is performed by the user program and only refers to the op­erating mode which was set when the module was configured.The required
parameters depend on this operating mode.

The fundamentals of parameterization are described in chapter 4.2.
For details, see the de scriptions of the individual operating modes.

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3.3.1 Installation of the Object Manager for STEP 7

Prerequisites

Installing the
object manager

Configuring the
hardware

To install the object manager (OM), STEP 7 (starting with V3.2) must be
installed correctly on your PG/PC.

To install the object manager, proceed as shown below.

1. Make sure that no applications are open in Windows.

2. Insert the data medium.

3. Call the SETUP.EXE program.

The CM35 counter module is located in the path shown below under STEP 7
! HW Config ! Catalog.

Figure 3-3 Counter module CM35 in the hardware catalog

Indicating
integrated help

In addition to the dialogs of the object manager, help information is available
which you can call during every phase of parameterization either with the F1
key or with the Help button.

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3.3.2 Central Integration into the SIMATIC S7-300

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Configuration

Module
address

Setting the
operating mode

When used with an S7--300, the module is configured with STEP 7 with the
application HW Config. To add a CM35 to an existing project, proceed as
shown below.

1. Start the SIMATIC Manager, and open the desired project.

2. In the left--hand portion of the project screen, select the SIMATIC 300
station to which you want to add the CM35.

3. Select the menu command Edit > Open Object.

This opens the HW Config application. This application contains a screen
with the hardware setup of the opened station.

4. Select the CM35 from the module catalog of HW Config, and place it in
the module rack.

Based on its position on the mounting rail, the required input and output ad­dress areas are automatically assigned to the CM35 and entered in the confi g­uration table.

When certain CPUs are used, these address areas can be changed. For de­tails, see manual /70/.

The operating mode of the CM35 must have already been set during the con­figuration. Proceed as shown below.

Commissioning

1. In the configuration table, select the line with the CM35, and select the
menu command Edit > Object Properties.

2. In the dialog box, open the tab Operating Mode, select the desired oper-
ating mode, and confirm with OK.

For additional details on preparation for operation, see manual /70/ and user
manual /231/.

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3.3.3 Distributed Integration into the SIMATIC S7

Configuration

Module
address

The module is configured as distributed I/O with the HW Config application
of STEP 7. To add a CM35 to an existing project, proceed as shown below.

1. Start the SIMATIC Manager, and open the desired project.

2. In the left--hand portion of the project screen, select the SIMATIC station
from which the DP slave is to be addressed.

3. Select the menu command Edit > Open Object.

This opens the HW Config application. This application contains a screen
with the hardware setup of the opened station.

4. If not already done, set up a DP slave. From the ²Hardware Catalog²
screen, select an ET 200M with IM 153-2, and place it in a PROFI­BUS--DP master system.

5. Select the CM35 from the hardware catalog, and place it in the ET 200M.

Based on the position on ET 200M, the required input and output address
areas are automatically assigned to the CM35 and entered in the configura­tion table. Address gaps in the address areas of the CPU rack are utilized.

The preset address areas can be changed in accordance with certain rules.
For more information on free address assignment, see manual /70/. Proceed
as shown below.

1. In the configuration table, select the line with the CM35, and select the
menu command Edit > Object Properties.

Setting the
operating mode

Commissioning

2. In the indicated dialog box, open the t ab Addresses, and enter the desired
start address.

If there are address overlaps with other modules, you will be told this
when you close the dialog box.

3. Leave the dialog box open so that you can make the following settings of
the module’s operating mode.

The operating mode of the CM35 must have already been set during configu­ration. Proceed as shown below.

1. If not already done, select the line with the CM35 in the configuration
table, and select the menu command Edit > Object Properties.

2. In the dialog screen, open the tab Operating Mode, select the desired
operating mode, and confirm with OK.

For additional preparations before operation, see manual /70/ and user
manual /231/.

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3.3.4 Distributed Integration into the SIMATIC S5

Note

This section assumes that you have a knowledge of SIMATIC S5 and
COM PROFIBUS.

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Integration on the
SIMATIC S5

The CM35 module can be linked as distributed I/O to the SIMATIC S5 using
PROFIBUS--DP.

The modular ET 200M I/O device is required to link the CM35 modules t o
PROFIBUS--DP. The SIMATIC S5 is connected to PROFIBUS--DP with in­terface IM 308--C. Another method is to use a SIMATIC S5--95U/DP master
with integrated PROFIBUS--DP interface.

3.3.4.1 Hardware Prerequisites

IM 308-C

Release 4 or later

Note

An FB 192 with release 3 can only be used with an IM 308--C starting with
release 6!

When release status 2 of the FB 192 is used, all versions of the IM 308-C
can be used starting with release status 3.

S5-95U/master DP

Release 2 or later

The maximum tra nsmission speed is 9600 Kbaud to 1.5 Mbaud, depending
on the length of the cable.

IM 153-1

Prerequisites for the coupling are an IM 153--1 (MLFB no. 6ES7
153--1AA02--0XB0 or later) and CM35 modules (MLFB no. 6AT1
735--0AA01--0AA0, release status 4 or later)

IM 153-2

Prerequisites for the coupling are an IM 153--2 (MLFB no. 6ES7
153--2AA01--0XB0, release status 2 or later) and CM35 modules (MLFB no.
6AT1 735--0AA01--0AA0).

CM35 modules (MLFB no. 6AT1 735--0AA01--0AA0, release status 4 or
later) are required for the IM 153--2 interfaces (MLFB no. 6ES7
153--2AA02--0XB0, release status 5 or later).

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3.3.4.2 Configuration

COM PROFIBUS

The IM 308-C interface module or S5-95U/DP master is parameterized with
the COM PROFIBUS software. With more recent versions of COM
PROFIBUS, you should be able to find the CM35 module in the ET 200M
under its order number 6AT1 735-0AA01-0AA0. See figure 3-4.

If you cannot find the CM35, copy the type or GSD files from the configura­tion package to the appropriate direc tory of COM PROFIBUS. Which files
must be copied depends on the version of COM PROFIBUS.

S With COM PROFIBUS (version £ 3.2): Copy the type files to the direc-

tory ²TYPDAT5X.²

S With COM PROFIBUS (version ³ 3.3): Copy the GSD files to the direc-

tory ²GSD.²

Figure 3-4 Selecting the CM35 module during configuration of the ET 200M

Table 3-7 Type and GSD files

File Name

SI801DV*.200 Type file for IM 153-1

ST801EU*.200 Type file for IM 153-2

SIM801D.GS* GSD file for IM 153-1

SIM801E.GS* GSD file for IM 153-2

SIM8071.GS* GSD file for IM 153-2 FO

* Identifies the particular language version

Use

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Note

The latest GSD files (only for COM PROFIBUS version ³ 3.3) can be down-
loaded from the Internet (SIMATIC Customer Support).

Internet address: http://www.ad. siemens.de/support/html_00/index.shtml

Copy the new GSD files to the ²GSD² directory, and execute the menu com­mand ²File > Open GSD File.²

Using the GSD files included with the configuration package has a drawback

-- you will not be using the latest GSD file (e.g., you may not be able to find
other new modules).

The type files are only required for older COM PROFIBUS
versions £ 3.2. In the future, they will be completely replaced by the
GSD files.

Configuration

Module
address

The module is configured as distributed I/O on the SIMATIC S5 with
COM PROFIBUS.

To add a CM35 to an existing DP master system, proceed as shown below.

1. Start COM PROFIBUS, and open the desired master system.

2. Open a DP slave (ET 200M with IM 153-1), or set up a new one.

3. Place the module in the ET 200M. In the configuration table, select the

desired slot, and select the button Order No. ...

In the dialog box ²Select...,² select the order number of the CM35
(6AT1 735-0AA01-0AA0), and select the Accept button.

4. Leave the configuration table open t o set the addresses and operating
mode which come next.

You can specify a start address for the input and for the output area. This ad­dress depends on the operating mode you want to use.

S Direct process inputs and outputs: Addresses in the P or Q area

Accesses only permitted via word load and transfer operations

S Accesses via FB 192: No address specifications required

For a detailed description of FB 192 and its manual, see the manual of
COM PROFIBUS.

Address overlapping with other modules or conflicts with reserved areas are
indicated by COM PROFIBUS.

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Module
address (for
use of
the IM 308-C)

The same start address is used for the input area and for the output area. The
CM35 module occupies 16 bytes in the input area and 16 bytes in the output
area. The module address must be a whole number multiple of 16. The start
address is also required for configuration under COM PROFIBUS.

Addressing in the process image (PY0 to PY127) should never be used for
consistent data.

Table 3-8 Possible addresses

CM35 number

Possible CM35 addresses P: 128 144 160 176 192 208 224 240

CM35 number 9 10 11 12 13 14 15 16

Possible CM35 addresses Q: 0 16 32 48 64 80 96 112

CM35 number 17 18 19 20 21 22 23 24

Possible CM35 addresses Q: 128 144 160 176 192 208 224 240

1)

A fixed relationship between CM35 number and address does not exist.A maximum of 24 CM35 modules can be ad­dressed per IM 308--C interface.

Module
address (for
use of
the S5-95U/DP)

1)

Input/output bytes 64 to 127 are used for both the local I/O (e.g., analog in­put/output modules, slots 0 to 7) and the distributed I/O (DP slaves). When
the local I/O is used (e.g., analog input/output modules), the address areas
must be reserved in the host parameters by the user with COM PROFIBUS.

1 2 3 4 5 6 7 8

Table 3-9 Possible addresses

CM35 number

Possible CM35 addresses P: 64 80 96 112 128 144 160 176

1 2 3 4 5 6 7 8

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Setting the
operating mode

The operating mode of the CM35 must have already been set during configu­ration. Proceed as shown below.

1. In the configuration table, select the line with the CM35, and click the

button Param. ...

2. In the dialog box ²Parameterize...,² select the field under ²Value ² in the
first line of the table (5), and click the Select... button. In the next dialog
box which appears, select the desired operating mode, and confirm with
OK.

3. Repeat this step in the second line of the table (8) with the same operating
mode. See figure 3-5.

4. In the ²Parameterize...² dialog box, click the OK button, and close the
configuration table with OK.

Commissioning

Figure 3-5 Setting the operating mode with COM PROFIBUS

Note

When distributed integration into the SIMATIC S5 is used, only the operat­ing modes ²period duration measurement² and ²timer² (time generator) are
permitted. See chapter 1.2.

For additional preparations before operation, see the manual of COM PROFI­BUS.

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Data consistency

When the distributed integration is used, data consistency must be consid­ered. Data are called consistent when their contents belong together.

When you access the CM35 with load/transfer commands, only word ac­cesses may be used and only even addresses may be accessed so that consis­tency is ensured.

Data consistency is specified via the COM PROFIBUS configurat ion. Word
consistency has already been set for the CM35 in the type or GSD files in­cluded in the configuration package.

Figure 3-6 Setting of the consistency via COM PROFIBUS

For more information, see the manual on the distributed I/O system ET 200.

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3.4 Reactions during Startup and in Case of Errors

Warm restart

Hot restart

Reaction to failure
of the S7-300

Module power
supply

When a warm restart (power on) takes place, the red group error LED (SF)
on the front of the module stays on until the module is ready for operation
(i.e., until it has received valid parameters).

When the module firmware recognizes the CPU STOP stat e, the parameters
stored on the CM35 lose their validity. Parameter memory and the input and
output area are deleted. This is indicated by the group error LED.

When the CPU assumes the STOP state , running operation of the CM35 is
terminated. The digital outputs are switched off (i.e., reset). Although the
operating mode is retained, the parameters are no longer valid.

Since the CM35 is completely powered by the backplane bus of the
SIMATIC S7-300, it has to be switched on together with the S7--300 CPU or
IM module.

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Data Communication with the CM35

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Communication with the CM35

4.1 Overview

Address area

Parameterization

The CM35 is located in the analog address area of the programmable control­ler.

Central operation:

The address is assigned in one of the following ways, depending on the
S7--300 CPU being used.

-- Slot--oriented

-- As desired

Use the module’s start address from HW Config.

Distributed operation:

The address of the CM35 can be assigned as desired.

The start address of the module can be taken from one of the following.

-- HW Config with an S7 master (e.g., CPU 315--2 DP)

-- COM PROFIBUS with an S5 master (e.g., IM 308-C).

Use HW Config or COM PROFIBUS to set the operating mode for the
CM35 (e.g., pulse counter).

The data required to operate the module in the selected mode (e.g., counting
direction and compa rison values for pulse counting mode) are transferred to
the CM35 with the parameterization.

Programming

The parameters must be transferred at least once to the CM35 after CPU
STOP ® RUN.

With centralized use of the CM35 and with distributed use on S7 masters, the
parameters are written with system function SFC 55 “WR_PARM.”

With DP use with S5 masters, the parameters are written with direct I/O ac­cesses (only in the permissible modes ²peri od duration measurement² and
²timer.²

After parameterization, you can

-- control operation of the individual channels via write accesses

-- read the data of the CM35 with read accesses

Depending on the selected operating mode and the parameteriz ation, the
module supports the triggering of hardware interrupts with the SIMATIC S7.
OB 40 must be programmed for this.

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4.2 Parameterization

ata

D

Communication with the CM35

Parameter data

Parameter block

The parameter data for the individual operating modes are combined into
parameter blocks. The required number of parameter blocks depends on the
operating mode which you selected.

The parameters must be transferred at least once to the CM35 after CPU
STOP ® RUN. After the data have been transferred correctly, the red SF
LED goes off and the m odule is ready for operation.

The parameters can be specified again during operation so that the individual
channels can be adjusted to the particular state of the process.

The parameter blocks can be transferred in any sequence. The order has no
effect on their use.

Note

Before a channel can be reparameterized, it must be stopped. The paramet ers
for a channel may not be changed or written while the channel is running.

A parameter block consists of the following.

-- A control word

-- Up to 6 words of data area (parameter data)

Table 4-1 Layout of a parameter block

Word Description

Wor d 1 Control word

Wor ds 2 t o 7 Parameter data

For the allocation and description of the parameter data for the individual
parameter blocks, see the description of the operating mode.

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Communication with the CM35

Layout of the
control word

The control word is the first word of each parameter block. The layout of the
control word is shown below.

The bit numbering is specifi ed for the data type ²word.²

-- The low byte of word ²n² has the byte address ²n+1.²

-- The high byte of word ²n² has the byte address ²n.²

Byte n

Start/stop byte

15X14X13X12X11 10 9 8 706 5 4 3 2 1 0

X = Disregard

Byte n+1

Coordination byte

Operating mode

Parameter block number

Consistency bit

Start/stop byte enable

Parameter block subnumber

Table 4--2 shows the permissible allocations of the cont rol word.

Table 4-2 Allocation of the control word for parameterization

Bit

Address

0to3 Identifier

for the set operating mode

4to5 Nu mb er

of the current parameter block

6 Consistency bit

-- Only with parameterization via
direct I/O accesses

-- Not applicable for parameterization
via SFC 55

7 Start/stop byte enable 0: Evaluate parameter data

Description Allocation

0001: Pulse counter operating mode
0010: Period duration measurement

operating mode
0011: Timer operating mode
0100: Positioning operating mode

01: Parameter block 1
10: Parameter block 2
11: Parameter block 3

0: Write parameter block
1: Accept parameter block via CM35

1: Evaluate start/stop byte

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Table 4-2 Allocation of the control word for parameterization, continued

Communication with the CM35

Bit

Address

8to11 Subnumber for parameter block

-- O n l y f o r ²positioning² mode

-- Not applicable to the operating modes
pulse counter, period duration measurement
and timer

12 to 15 Disregard

Example (S5)

²Timer² mode/parameterization via direct I/O accesses
Write parameter block 2:
To write data assign W#16#0023 to control word
To accept data via CM35 assign W#16#0063 to control word

Data transmission

The parameter blocks for the parameterization of the CM35 can be written in
one of the following ways.

-- Use of data record number 1 with SFC 55 “WR_PARM”

-- Write the analog I/O address area with direct I/O accesses

The data are written with SFC 55 when the CM35 is used with SIMATIC S7.

AllocationDescription

0000: Parameter subblock 0
0001: Parameter subblock 1 (axis 1)
0010: Parameter subblock 2 (axis 2)
0011: Parameter subblock 3 (axis 3)
0100: Parameter subblock 4 (axis 4)

Direct I/O write-- accesses to the data must be used for DP operation with S5
masters or standard DP masters. A consistency bit which must be specified
via the user program is available to ensure the data consistency of a parame­ter block.

CM35 Counter Module
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Communication with the CM35

D

4.2.1 Parameterization with SFC 55 (Only SIMATIC S7)

SFC 55 “WR_PARM” can be used to transfer to the module a complet e pa­rameter block (cont rol word and parameterization data, length of 14 bytes) as
data record 1.

Below is an example for the transmission of the 1st parameter block from DB
20 (pulse counting mode). The CM35 has the logical base address 256.

Table 4-3 Sample allocation for a data block (DB 20)

DB

Address

+0.0 Para_Block_1_Data STRUCT

+0.0 Control word WORD W#16#11 Parameter block 1/

+2.0 Cmp_Start_Va-

lue_Chan_1

+4.0 Cmp_Start_Va-

lue_Chan_2

+6.0 Cmp_Start_Va-

lue_Chan_3

+8.0 Cmp_Start_Va-

lue_Chan_4

+10.0 Cmp_Start_Va-

lue_Chan_5

+12.0 Cmp_Start_Va-

lue_Chan_6

=14.0 END_STRUCT

Name Type Initial Value Commentary

pulse counting mode

WORD W#16#00 Comparison value/start value,

channel 1

WORD W#16#00 Comparison value/start value,

channel 2

WORD W#16#00 Comparison value/start value,

channel 3

WORD W#16#00 Comparison value/start value,

channel 4

WORD W#16#00 Comparison value/start value,

channel 5

WORD W#16#00 Comparison value/start value,

channel 6

CALL SFC55

REQ :=true // Request to

write

IOID :=B#16#54 // Area identifie r for

composite mod.
LADDR :=W#16#100 // Logical address = 256
RECNUM :=B#16#1 / / Data record number 1
RECORD :=P#DB20.DBX 0.0 BYTE 14 // Pointer to beginning

of the block
RET_VAL :=#ret_val // Error code
BUSY :=#busy // = 1, writing not

concluded

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CM35 Counter Module

ata

Communication with the CM35

D

SFC 55 must continue to be called until BUSY is reset.

SFC 55 should not be used in OB100. We recommend setting a flag bit
(startup identifier) in OB100 instead. SFC 55 should then be called based on
this flag bit to parameterize the CM35 after the automation system is turned
on.

If an error occurs while the function is being processed, the error code is indi­cated in parameter RET_VAL, and BIE is set to ²0.²

For a description of the parameterization of the system functions and the re­turn values, see STEP 7 reference manual /235/.

CM35 Counter Module
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4-7

D

ata

Communication with the CM35

4.2.2 Parameterization via Direct I/O Accesses (Only SIMATIC S5)

Parameterization via direct accesses is only permitted in the ²period duration
measurement² and ²timer² operating modes.

Assignment of the
I/O address area

Use of the consis­tency bit

The analog I/O address area contains 8 words. The data must be written with
word accesses.

The I/O address area is used for parameterization as shown below.

Table 4-4 Assignment of the address area for parameterization via direct I/O

accesses

Offset for the

Module Start Address

+0 DO byte (digital output control)

may not be written during parameterization.

+2 Control word

+4 to +14 Parameterization data

Description

The consistency (”C bit”) in the control word is used with direct--access para­meterization to ensure consistency of the written values within one parameter
block.
The CM35 does not evaluate the transferred values of one parameter block as
long as the C bit is not set. These values do not becom e valid until the con­trol word is written with C bit = 1.

Transmission of
parameter blocks

The following sequence must be used to transfer the pafameter blocks.

1. Transfer the control word with C bit = 0.

2. Transfer all required data of the parameter block.

3. Transfer the control word with C bit = 1.

Transfer next parameter block.

Note

The c hannels may not be started or stopped by accesses to the control word
while parameter bl ocks are being transferred. The system must be in a de­fined state before parameter blocks are transferred.

An example is shown below.

-- ²Timer² operating mode

-- Transmission of the 1st parameter block from DB 20

-- The CM35 has the module start address 128.

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CM35 Counter Module

Table 4-5 Sample allocation for a data block (DB 20)

ata

Communication with the CM35

D

DB Ad-

dress

0 Control_word WORD W#16#13 Parameter block 1/²timer² operating mode

2 Timebase_Timer_1 BYTE B#16#01 Time base for timer 1

3 Timebase_Timer_2 BYTE B#16#01 Time base for timer 2

4 Timebase_Timer_3 BYTE B#16#01 Time base for timer 3

5 Timebase_Timer_4 BYTE B#16#01 Time base for timer 4

6 Timebase_Timer_5 BYTE B#16#01 Time base for timer 5

7 Timebase_Timer_6 BYTE B#16#01 Time base for timer 6

8 Timebase_Timer_7 BYTE B#16#01 Time base for timer 7

9 Timebase_Timer_8 BYTE B#16#01 Time base for timer 8

10 Factor_Timer_1 WORD W#16#01 Factor for timer 1

12 Factor_Timer_2 WORD W#16#01 Factor for timer 2

14 Control_word WORD W#16#53 C bit = 1/parameter block 1/

Name Type Initial

Value

²timer² operating mode

Commentary

A DB20 // Open data block.
L DBW0 // Load control word with C bit=0.
T PW 130 // Module start address + 2

L DBW2 // Load time base for timers 1 and 2.
T PW 132 // Module start address + 4

L DBW4 // Load time base for timers 3 and 4.
T PW 134 // Module start address + 6

...

L DBW12 // Load factor for timer 2.
T PW 140 // Module start address + 14

L DBW14 // Load control word with C bit = 1.
T PW 130 // Module start address + 2

Transfer next parameter block.

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Communication with the CM35

D

Wait time, OB1/
OB100

When distributed connection to the SIMATIC S5 is used, a wait time must be
adhered to after an S5 CPU STOP/RUN transition, before the module is para­meterized via direct I/O accesses.

The wait time depends on the PROFIBUS transmission speed set. It can be
configured in OB 100 or OB 1.

The following standard values apply

.

187.5 kbit/sec ® 500 msec wait time
::

1.5 kbit/sec ® 100 ms wait time
::
12 kbit/sec ® 10 ms wait time

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CM35 Counter Module

4.3 Programming

ata

Parameterization must be correct before the channels and digital outputs can
be controlled and the actual values can be read.
With both the SIMATIC S7 and the SIMATIC S5, direct I/O accesses are al­ways used. Only word or double--word accesses to even addresses can be
used for I/O accesses.

4.3.1 Controlling the Chann els

The i ndividual channels of the CM35 can be started and stopped by writing
the control word. The control word must be written to address ²module start
address + 2.²

Communication with the CM35

D

Layout of the
control word

The control word is assigned as shown below to start and stop the channels.

Byte n

Start/stop byte

15 14 13 12 11 10 9 8 716X50403 2 1 0

Byte n+1

Coordination byte

Consistency bit (disregard)

Start/stop byte enable

Start/stop byte

Table 4-6 shows the permissible assignments of the control word.

Table 4-6 Allocation of the control word for controlling the channels

Bit Address

0to3 Identifier

4to5 Always 0 00: Start/stop byte is written.

6 Disregard 0/1: Consistency bit

7 Start/stop byte enable 0: Evaluate parameter data

8to15 Start/stop byte

Oper. mode: Pulse counter

Oper. mode: Positioning

Description Allocation

0001: ²Pulse counter² operating mode

for the operating mode set

Period duration meas.
Timer

0010: ²Period duration measurement²

operating mode

0011: ²Timer² operating mode
0100: ²Positioning² operating mode

1: Evaluate start/stop byte

Bit Address

8to15

9, 8; 11, 10;
13, 12; 15, 14

0: Stop channel
1: Start channel

01: Start axis
10: Stop axis

Oper. mode

CM35 Counter Module
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4-11

ata

Communication with the CM35

D

Example: ²Pulse counter² operating mode

To start all channels, write control word W#16#FF81.
To stop all channels, write control word W#16#0081.

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CM35 Counter Module

4.3.2 Controlling the Digital Outpu ts

The digital output s of the CM35 can be controlled by the user program, based
on the parameterization selected.

The status of the digital outputs can be specified by writing the DO pattern
(DO byte) to I/O output byte ²module start addre ss + 0.²

Table 4-7 Allocation of the DO byte for controlling the digital outputs

DataCommunication with the CM35

Bit

Address

0

1

2

3

4

5

6

7

Description Allocation

Digital output 1 0: Digital output off

Digital output 2

Digital output 3

Digital output 4

Digital output 5

Digital output 6

Digital output 7

Digital output 8

1: Digital output on

Example (S7): Set outputs 1 and 5 of the ²pulse counter² operating mode.

- Parameterize DO mode with CPU control.

- The CM35 has the module start address 256.

L 2#0001_0001_0000_0000 // Load DO byte to set outputs 1 and 5
T PQW 256 // Module start address = 256

Note

CM35 Counter Module
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Remember that only word--accesses to even addresses are permitted.

4-13

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Communication with the CM35

D

4.3.3 I/O Write Accesses

When I/O write accesses (T PQW) are used, it is essential to remember that
write accesses to the same I/O addresses may overwrite each other before
being transferred to the CM35.

Example, pulse counter:

Start channel 1, then start channel 4 shortly afterwards

L W#16#0181 // Start channel 1

T PQW 258 // Module start address +2

:: :

L W#16#0881 // Start channel 4

T PQW 258 // Module start address +2

If the time between the start of channel 1 and channel 4 is too short, the start
command for channel 1 may be overwritten by the start command for chan­nel 4.

This is particularly apt to happen if you are using distributed connection of
the CM35 with low bus transmission rates. In this case, the 1st start com­mand (channel 1) is overwritten by the 2nd start command (channel 4) before
the 1st start command can be sent to the module via PROFIBUS.

The following measures should be taken to ensure that I/O write accesses do
not compete at the same address.

S The same I/O address may only be write--accessed once during one OB1

cycle.

S When a distributed layout is used, the DP cycle should be at least twice as

fast as the CPU cycle (DP cycle and CPU cycle can be determined with
STEP 7).

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CM35 Counter Module

4.3.4 Reading the Data

The CM35 supplies the following data, based on the operating mode set.

Table 4-8 Data of the CM35

DataCommunication with the CM35

Operating Mode

Pulse counter Current counting value Word

Period duration measurement Measured period duration Wor d

Timer Status of the timer Byte

Positioning Current actual position DWord

Data Data Type

For the allocation and description of the data of the CM35, see the descrip­tion of the particular operating mode.

Remember the following points which concern the assurance of data consis­tency based on the programmable controlle r used.

SIMATIC S7 (central or distributed)
Only one single load command (L PIW or L PID) can be used to read the

desired value.
This means that an actual value in double--word format m ust be read with
one double--word access (L PID). Use of t wo word accesses (L PIW) can
cause data inconsistency in this case.

SIMATIC S5 or standard DP master (distributed)

Only word--accesses to even addresses may be used to read--access the de-
sired value.

Table 4-9 shows an example of the address allocation for reading the count­ing values in ²pulse counter² mode.

Table 4-9 Address allocation of the counting values for the ²pulse counter² operat-

ing mode

Offset to

Module Start Address

+0 Counting value, channel 1 0 to 65535

+2 Counting value, channel 2

+4 Counting value, channel 3

+6 Counting value, channel 4

+8 Counting value, channel 5

+10 Counting value, channel 6

+12 Counting value, channel 7

+14 Counting value, channel 8

Meaning Value Range

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Communication with the CM35

D

Example: ²Pulse counter² mode

-- Read counting value of counting channel 4

-- The CM35 has module start address 256.

L PIW 262 // Address = 256 + 6, read counting value,

channel 4

T MW 8 // Save the counting value

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CM35 Counter Module

D

ata

4.3.5 Evaluating a Hardware Interrupt in OB 40

Depending on the set operating mode and the selected parameterization, you
can specify that a hardware interrupt is to be triggered when certain events
occur. In this case, a hardware interrupt OB (OB 40) must exist on the CPU.

When a hardware interrupt occurs, the user program is inte rrupted, the data
of the module are transferred to the start information of OB 40, and OB 40 is
called. The hardware interrupt is acknowledged when OB 40 is exited.

The following local data are located in the start information of OB 40.

-- OB 40_MDL_ADDR: The base address of the module which trig-

gered the interrupt

-- OB 40_POINT_ADDR: Information on the event which triggered the

interrupt

Variable OB40_POINT_ADDR consists of four bytes. The process
interrupt information of the CM35 is entered in the low word (local data
bytes 10 and 11 of OB 40). For the allocation and description of this interrupt
information, see the description of the particular operating mode .

Communication with the CM35

For a description of OB 40, see STEP 7 reference manual /235/.

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4-17

DataCommunication with the CM35

Table 4-10 Hardware interrupts in the various operating modes

Local Data of OB 40 Hardware Interrupts

Local data word 6 Address of the module which triggered the hardware interrupt

Local data byte 10 Operating Mode

Bit 0 Reserved No hardwa re inter-

Bit 1

Bit 2 Timer 3 faulty

Bit 3 Timer 4 faulty

Bit 4 Timer 5 faulty

Bit 5 Timer 6 faulty

Bit 6 Timer 7 faulty

Bit 7 Timer 8 faulty

Local data byte 11 Operating Mode

Bit 0 Counter channel 1 has re -

ached the comparison va-

Bit 1 Counter channel 2 has re -

ached the comparison va-

Bit 2 Counter channel 3 has re -

ached the comparison va-

Bit 3 Counter channel 4 has re -

ached the comparison va-

Bit 4 Counter channel 5 has re -

ached the comparison va-

Bit 5 Counter channel 6 has re -

ached the comparison va-

Bit 6 Counter channel 7 has re -

ached the comparison va-

Bit 7 Counter channel 8 has re -

ached the comparison va-

(The function must have been activated before the interrupts are reported.)

Pulse Counter Period Duration

Pulse Counter Period Duration

lue.

lue.

lue.

lue.

lue.

lue.

lue.

lue.

Measurement

rupts are reported in
this operating mode.

Measurement

No hardware inter­rupts are reported in
this operating mode.

Timer for

Selective Interrupt

(for Group Interrupt)

Timer 1 faulty

(malfunction of a timer)

Timer 2 faulty

(disregard)

(disregard)

(disregard)

(disregard)

(disregard)

(disregard)

(disregard)

Timer for

Selective Interrupt

(for Group Interrupt)

Time r 1 ha s expired.
(a timer has expired)

Time r 2 ex pired

(disregard)

Time r 3 ex pired

(disregard)

Time r 4 ex pired

(disregard)

Time r 5 ex pired

(disregard)

Time r 6 ex pired

(disregard)

Time r 7 ex pired

(disregard)

Time r 8 ex pired

(disregard)

Positioning

Reserved

Positioning

Axis 1 has reached

setpoint position.

Reserved

Axis 2 has reached

setpoint position.

Reserved

Axis 3 has reached

setpoint position.

Reserved

Axis 4 has reached

setpoint position.

Reserved

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CM35 Counter Module

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Communication with the CM35

D

4.4 Overview of the Allocation of the Address Area and Sequence of the Evaluation

Allocation of the
address area

Table 4-11 shows a summary of the allocation of the address area for writing
data via direct I/O accesses.

Table 4-11 Allocation of the I/O address area for writing via direct I/O accesses

Offset to

Module Address

(by Word)

+0 Do not write--access during parameterization.

Byte +0 (DO byte) Byte +1 (reserved)

Control digital outputs
(0=off,1=on)

XXXX XXX? Digital output 1
XXXX XX?X Digital output 2
XXXX X?XX Digital output 3
XXXX ?XXX Digital output 4
XXX? XXXX Digital output 5
XX?X XXXX Digital output 6
X?XX XXXX Digital output 7
?XXX XXXX Digital output 8

+2 Control word

Byte +2 (start/stop byte) Byte +3 (coordination byte)

(For SFC55: +0)

Bit allocation when starting/stopping
channels/axes (bit 3.7 = 1)

Operating mode:
Pulse counter, period duration measurement, timer

XXXX XXX? Channel 1: 0 stop, 1 start (*)
XXXX XX?X Channel 2: 0 stop, 1 start (*)
XXXX X?XX Channel 3: 0 stop, 1 start (*)
XXXX ?XXX Channel 4: 0 stop, 1 start (*)
XXX? XXXX Channel 5: 0 stop, 1 start (*)
XX?X XXXX Channel 6: 0 stop, 1 start (*)
X?XX XXXX Channel 7: 0 stop, 1 start (*)
?XXX XXXX Channel 8: 0 stop, 1 start (*)

(*) If the channel was already started, the procedure
is continued when another ²1² occurs.

Operating mode: Positioning

XXXX XX?? Axis 1: 01 start, 10 stop
XXXX ??XX Axis 2: 01 start, 10 stop
XX?? XXXX Axis 3: 01 start, 10 stop
??XX XXXX Axis 4: 01 start, 10 stop

Bit allocation for transmission
parameter blocks (bit 3.7 = 0 and
mode)

XXXX ???? Parameter block subnumber

0000 = Parameter subblock 0
0001 = Parameter subblock 1
:
0100 = Parameter subblock 4

Output Area (16 Bytes)

Always 0

XXXX ???? Operating mode

XX?? XXXX 00: Start/stop

X?XX XXXX: Consistency bit

of

²²²²positioning²²²²

?XXX XXXX: 0: Evaluate parameterization data

0001: Pulse counter
0010: Period duration

measurement
0011: Timer
0100: Positioning

channels/axes
01: Transfer parameter block 1
10: Transfer parameter block 2
11: Transfer parameter block 3

With SIMATIC S7 (SFC 55):
Disregard

With SIMATIC S5:
0: Write parameter block
1: CM35 accepts parameter

block.
Note:
Wait time of 1 msec
between 0 ® 1

1: Evaluate start/stop byte

CM35 Counter Module
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4-19

DataCommunication with the CM35

Table 4-11 Allocation of the I/O address area for writing via direct I/O accesses

Module Address

(by Word)

+4 to +14

(With SFC55:
2to12)

Parameterization data

Pulse counter: Parameter blocks 1 to 3
Period duration measurement: Parameter block 1
Timer: Parameter blocks 1 to 3
Positioning: Parameter block 1 (subnumbers 0 to 4)

Parameterblock2(subnumbers1to4)

Output Area (16 Bytes)Offset to

Note: With parameterization via SFC55, the data to be transferred are set up the same as

output words 2 to 14.

Note

Only word or double--word accesses t o even addresses can be used for I/O
accesses.

4-20

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CM35 Counter Module

Addr

Address

DataCommunication with the CM35

Table 4-12 Allocation of the I/O address area when reading via direct I/O accesses

Offset to the

Module

ess

(by Word)

+0 Current counting value,

+2 Current counting value,

+4 Current counting value,

+6 Current counting value,

+8 Current counting value,

+10 Current counting value,

+12 Current counting value,

+14 Current counting value,

Pulse Counter Period Duration

channel 1

channel 2

channel 3

channel 4

channel 5

channel 6

channel 7

channel 8

Input Area (16 Bytes)

Operating Mode

Measurement

Measured

period duration average

value, channel 1

Measured

period duration average

value, channel 2

Measured

period duration average

value, channel 3

Measured

period duration average

value, channel 4

Measured

period duration average

value, channel 5

Measured

period duration average

value, channel 6

Measured

period duration average

value, channel 7

Measured

period duration average

value, channel 8

Timer Positioning

Status of timer:
Bit0:Channel1
Bit1:Channel2
Bit2:Channel3
Bit3:Channel4
Bit4:Channel5
Bit5:Channel6
Bit6:Channel7
Bit7:Channel8

0: Timer is active.
1: Timer has expired

and can be started again
after a STOP command.

Reserved

Reserved Current actual

Reserved

Reserved Current actual

Reserved

Reserved Current actual

Reserved

Current actual
position, axis 1

position, axis 2

position, axis 3

position, axis 4

Note

Only word or double--word accesses t o even addresses can be used for I/O
accesses.

CM35 Counter Module
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4-21

D

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Communication with the CM35

Order of
evaluation

Start

Change in

DO byte?

No

Change in

coordination

byte?

No

When the CM35 recognizes that new data have been written in its address
area, the DO byte and the coordination byte are evaluated in the following
order.

Evaluate DO

byte and

Yes

Yes

Start/stop

byte

enable = 1?

No

Yes

conclude proc-

essing.

Evaluate

start/stop byte

and conclude

processing.

Conclude processing

Evaluate

Consistency

bit = 1?

No

Conclude processing

Yes

parameter block

and conclude

processing.

Note

Remember that either a change in the DO byte or a change in the coordina­tion byte is evaluated.

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CM35 Counter Module

Pulse Counter Operating Mode

5

CM35 Counter Module
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5-1

Pu

l

s

r

a

e CounterOpe

tingMode

5.1 Function Description

In this operating mode, the CM35 counts continuously up or down within the
counting range 0 to 65535, when the counter is enabled.

-- When the counting value reaches the upper counting limit when
counting up, and an additional counting pulse occurs, the counting
value j umps to the lower counting limit and continues to count from
there without losing an impulse.

-- When the counting value reaches the lower counting limit when
counting down, and an additional counting pulse occurs, the counting
value jumps to the upper counting limit and continues to count from
there without losing an impulse.

Table 5-1 Counting range

Counting Range

16 bits 0 65535 Max. of 10 kHz

Upper counting
limit

Lower counting
limit

Figure 5-1 Counting up with counter started

Lower Counting

Limit

Counter status

Upper Counting

Limit

Counting

Frequency

5-2

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CM35 Counter Module

l

s

e CounterOpe

r

a

Pu

tingMode

Starting
or stopping the
counter

Counting edge

The individual count ing channels are started and stopped by the user pro­gram. After a counting channel is started, t he encoder pulses are counted.
After a counting channel is stopped, the encoder pulses are no longer ac­quired.

When a counter is started, the CM35 turns on the related digital output.
When the comparison value is reached, the digital output is switched off and
a hardware interrupt is triggered.

Comparison value

0

Digital
output

Figure 5-2 Switching the digital output, counting direction up

1

0

Counter start

Counter stop

The c ounting value is changed with every falling edge on the related counter
input.

Counting
value

Encoder pulses

Figure 5-3 Evaluation of the encoder pulses, counting direction up

0 1 2 3 4 5 6 7 8 8 8

1
0

Counter start

Counter stop

CM35 Counter Module
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5-3

l

s

e CounterOpe

r

a

Pu

tingMode

5.2 Parameterization

This chapter discusses possible parameterization in ²pulse counter² operating
mode which you can use to adjust the reaction of the count ing channels to
your task.

The parameter data are divided into three parameter blocks. For the structure
of these parameter blocks, see chapter 5.2.2. The number of the parameter
block and the offset in the related structure are specified in the description of
the individual parameter data.

To be able to utilize the ²pulse counter² ope rating mode, you must transfer at
least parameter blocks 1 and 2 to the CM35.

Note

A channel must be stopped before it can be reparameterized.

-- If you want to change channel--specific parameters, this channel must

-- If you want to change parameters affecting more than one channel, all

be stopped.

channels must be stopped.

The new parameterization data take effect when the channel is started again.

For general layout and transmission of the parameter blocks, see chapter 4.2.

5.2.1 Description of the Parameterization Data

Counting direction

When you specify the direction of counting, you determine the direction in
which the encoder pulses are counted.

Counting direction, up: Encoder pulses increment counting value.
Counting direction, down: Encoder pulses decrement counting value.

The parameterized direction of counting applies to all channels.

Table 5-2 Direction of counting

Variable:

Counting

Direction

C_Direction 2 7.0 Bool 0: Counting direction, up

Parameter

Block

Offset Data

Value Range

Type

1: Counting direction,

down

5-4

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CM35 Counter Module

l

s

e CounterOpe

r

a

Pu

tingMode

Comparison value/
start value

When you specify the counting direction, you determine how the comparison
value/start value parameter will be used.

Counting up:

The transferred value is the comparison value.The following happens when a
counter is started.

-- Counting begins with the start value ²0.²

-- The counting value is incremented with each encoder pulse.

When the counting value reaches the specified comparison value, the para­meterized reactions are triggered (e.g., reset digi tal output, trigger hardware
interrupt).

Counting down:

The transferred value is the start value. The following happens when a count­ing procedure is started.

-- The counting value is set to the specified start value.

-- The counting value is decremented with each encoder pulse.

When the counting value reaches the comparison value ²0,² the parameter­ized reactions are triggered (e.g., reset digital output, trigger hardware inter­rupt).

The comparison value/ start value can be specified for a specific c hannel.

Table 5-3 Comparison and start value

Variable:
Comparison or Start Value
(Depending on Dir ection of

Counting)

Cmp_Start_Value_Chan_1 1 2.0 Wo rd 0 to 65535

Cmp_Start_Value_Chan_2 1 4.0 Wo rd

Cmp_Start_Value_Chan_3 1 6.0 Wo rd

Cmp_Start_Value_Chan_4 1 8.0 Wo rd

Cmp_Start_Value_Chan_5 1 10.0 Wo rd

Cmp_Start_Value_Chan_6 1 12.0 Wo rd

Cmp_Start_Value_Chan_7 2 2.0 Wo rd

Cmp_Start_Value_Chan_8 2 4.0 Wo rd

Parameter

Block

Offset Data

Type

Value

Range

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Counting value

65,535

Upper counting limit

Parameterized

30,000

0

Parameterized

comparison value start value

Start

a) Counting up b) Counting down

Stop Start Stop

Figure 5-4 Use of the comparison value/start value parameter, delete counting value

after stop

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CM35 Counter Module

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Counting value
after counter stop

The ²delete counting value² variable can be used to specify which counting
value is to be indicated after stop.

Delete counting value at stop: After the count ing procedure has been

stopped,
the counting value is set to the start value.

Delete counting value at start: After the counting procedure has been

stopped,
the current counting value is retained until
the next start.

Parameterization applies to all channels.

Table 5-4 Delete counting value

Variable

Delete_CountVal 2 7.5 Bool 0: Delete counting value

Parameter

Block

Offset Data

Type

Value Range

at stop

1: Delete counting value

at start

Counting value

65,535

30,000 Start

value

0

Start

a) Delete counting value at stop b) Delete counting value at start

Figure 5-5 Current counting value after a counter has stopped (counting down)

Stop Start Stop

Old
counting
value

Start
value

Counting
value
before
stop

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Switching reaction
of the digital
outputs

You can choose between automatic operation and CPU control to control the
digital outputs.

DO mode

Automatic: When a counter starts, the related output

is switched on.
When the comparison value is reached,
the related output is switched off.
While counting is running, a switched on output can be
reset by the user program.

CPU control: The user program specifies the status of the outputs.

The status is not linked to the counting procedure
(e.g., for adjustment mode).

DO mode can be specified for specific channels.

Table 5-5 DO mode

Variable:

DO_Mode

DO_Mode_Chan_1 2 6.0 Bool 0: Automatic

DO_Mode_Chan_2 2 6.1 Bool

DO_Mode_Chan_3 2 6.2 Bool

DO_Mode_Chan_4 2 6.3 Bool

DO_Mode_Chan_5 2 6.4 Bool

DO_Mode_Chan_6 2 6.5 Bool

DO_Mode_Chan_7 2 6.6 Bool

DO_Mode_Chan_8 2 6.7 Bool

Parameter

Block

Offset Data

Type

Value Range

1: CPU control

5-8

Dribbling

Comparison
value

Start
value

Digital
output

Figure 5-6 Switching of the digital outputs during automatic mode (counting up)

1
0

Stop

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StartStart

CM35 Counter Module

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Hardware
interrupts

You can use the ²interrupt generation² variable to specify whether a hardware
interrupt is to be triggered by the CM35 when the comparison value is
reached. You can use the hardware interrupt OB to evaluate which channel
has reached the comparison value.

After a counter starts, only one hardware interrupt is triggered even when the
comparison value is reached a second time.

Parameterization applies to all channels.

Table 5-6 Interrupt generation

Variable

Interrupt_

Generation

Upper
counting limit

Compari­son value

Parameter

Block

2 7.6 Bool 0: No hardware interrupts

Offset Data

Type

Value Range

1: Hardware interrupts

enabled

Start value

Counter
start

Figure 5-7 Hardware interrupt generation (counting up)

Hardware
interrupt

No
hardware
interrupt

Counter
stop

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Scanning rate

You can use the scanning rate factor to specify that the counting value does
not change until the stated number of encoder pulses has occurred.
This increases the counting range of the encoder pulses by a multiple of the
scanning rate factor.

Evaluation of the channel--specific scanning rate factors must be enabled
with the ²scanning rate² group bit.

When a counting procedure starts, the scanning rate factor is always started
again. The remaining pulses are not carried over from the previous counting
procedure.

Counting
value

Encoder pulses

Counting pulses

Figure 5-8 Generation of the counting value with a scanning rate factor of 3

1
0

(counting up)

0 0 1 1 1 1 0 0 1 1

Counter start

Counter start Counter stop

Enabling of a scanning rate factor applies to all channels.

Table 5-7 Scanning rate

Variable

Scanning

Rate

Parameter

Block

2 7.7 Bool 0: Scanning rate not enabled

Offset Data

Type

Value Range

1: Scanning rate enabled

The scanning rate factor can be specified for each channel.
If you specify ²0² or ²1,² the channel does not use the scanning rate.

Table 5-8 Scanning rate factor

Variable:

Scanning Rate Factor

ScanRate_F_Chan_1 2 8.0 Byte 0to255

ScanRate_F_Chan_2 2 9.0 Byte

ScanRate_F_Chan_3 2 10.0 Byte

ScanRate_F_Chan_4 2 11.0 Byte

ScanRate_F_Chan_5 2 12.0 Byte

ScanRate_F_Chan_6 2 13.0 Byte

ScanRate_F_Chan_7 3 2.0 Byte

ScanRate_F_Chan_8 3 3.0 Byte

Parameter

Block

Offset Data

Type

Value Range

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CM35 Counter Module

5.2.2 Structure of the Parameter Blocks

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Tables 5-9, 5-10 and 5-11 show the data structures of the three parameter
blocks as they must be transferred with SFC55 calls to the CM35.

The first word of the parameter blocks contains the control word. The re­quired assignment is entered as the initial value in the structures.

For transmission of the data, see chapter 4.2.

Parameter block 1 contains:

S The comparison or start values for channels 1 to 6

Table 5-9 Parameter block 1

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Address

+0.0 Control_word WORD W#16#11 Parameter block no. 1/counter mode

+2.0 Cmp_Start_Value_Chan_1 WORD W#16#00 Comparison value/start value, channel 1

+4.0 Cmp_Start_Value_Chan_2 WORD W#16#00 Comparison value/start value, channel 2

+6.0 Cmp_Start_Value_Chan_3 WORD W#16#00 Comparison value/start value, channel 3

+8.0 Cmp_Start_Value_Chan_4 WORD W#16#00 Comparison value/start value, channel 4

+10.0 Cmp_Start_Value_Chan_5 WORD W#16#00 Comparison value/start value, channel 5

+12.0 Cmp_Start_Value_Chan_6 WORD W#16#00 Comparison value/start value, channel 6

=14.0 END_STRUCT

Name Typ e Initial

Value

Para_Block_1_Data STRUCT

Commentary

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Parameter block 2 contains:

S The comparison or start values for channels 7 and 8

S The bit--coded settings

S The scanning rate factors for channels 1 to 6

Table 5-10 Parameter block 2

-- For the switching reaction of the outputs

-- For the direction of counting

-- For the counting value after counter stop

-- For interrupt generation

-- For selection of scanning rate

Address

+0.0 Control_word WORD W#16#21 Parameter block no. 2/counter mode

+2.0 Cmp_Start_Value_Chan_7 WORD W#16#00 Comparison value/start value, channel 7

+4.0 Cmp_Start_Value_Chan_8 WORD W#16#00 Comparison value/start value, channel 8

+6.0 DO_Mode_Chan_1 BOOL FA LSE DO mode: 0 = Automatic

+6.1 DO_Mode_Chan_2 BOOL FA LSE

+6.2 DO_Mode_Chan_3 BOOL FA LSE

+6.3 DO_Mode_Chan_4 BOOL FA LSE

+6.4 DO_Mode_Chan_5 BOOL FA LSE

+6.5 DO_Mode_Chan_6 BOOL FA LSE

+6.6 DO_Mode_Chan_7 BOOL FA LSE

+6.7 DO_Mode_Chan_8 BOOL FA LSE

+7.0 C_Direction BOOL FALS E Counting direction: 0 = Up

+7.1 Enable_Mode BOOL FALSE Enable mode:

+7.2 Reserve_1 BOOL FALS E Reserved

+7.3 Reserve_2 BOOL FALS E

+7.4 Reserve_3 BOOL FALS E

+7.5 Delete_CountVal BOOL TRUE Delete counting value: 0 = At stop

+7.6 Interrupt_Generation BOOL FA LS E Interrupt generation: 0 = none,

+7.7 ScanningRate BOOL FA LS E Scanning rate: 0 = no, 1 = yes

+8.0 ScanRate_F_Chan_1 BYTE B#16#0 Encoder Scanning rate, channel 1

+9.0 ScanRate_F_Chan_2 BYTE B#16#0 Encoder Scanning rate, channel 2

+10.0 ScanRate_F_Chan_3 BYTE B#16#0 Encoder Scanning rate, channel 3

+11.0 ScanRate_F_Chan_4 BYTE B#16#0 Encoder Scanning rate, channel 4

+12.0 ScanRate_F_Chan_5 BYTE B#16#0 Encoder Scanning rate, channel 5

+13.0 ScanRate_F_Chan_6 BYTE B#16#0 Encoder Scanning rate, channel 6

=14.0 END_STRUCT

Name Type Initial V alue Commentary

Para_Block_2_Data STRUCT

1 = CPU control

1 = Down

(only applicable to ²automatic² DO
mode)
0 = Continuous enable
1 = Enable control by DO byte

1=Atstart

1 = active

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CM35 Counter Module

Parameter block 3 contains:

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S The scanning rate factors for channels 7 and 8

Table 5-11 Parameter block 3

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Address

+0.0 Control_word WORD W#16#31 Parameter block no. 3/

+2.0 ScanRate_F_Chan_7 BYTE B#16#0 Encoder scanning rate, channel 7

+3.0 ScanRate_F_Chan_8 BYTE B#16#0 Encoder scanning rate, channel 8

+4.0 Res_4 ARRAY [0..9] B#16#0 In reserve

*1.0 BYTE

=14.0 END_STRUCT

Name Type Initial Value Commentary

Para_Block_3_Data STRUCT

counter mode

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5.3 Starting and Stopping the Counting Channels

After the module has been parameterized, you can start and stop the individ­ual counting channels of the CM35. To do this, write the start/stop block to
the address ²module start address + 2.²

Table 5-12 shows the contents of the start/stop block. The required assign­ment of the coordination byte is entered as the initial value in the structure.
For a description of the bit assignment of the coordination byte, see chapter

4.3.1.

Write--accesses to the start/stop block must be programmed as word-­accesses.

Table 5-12 Start/stop block

Address

+0.0 Start_Stop_Chan_1 BOOL FA LSE 0: Stop channel

+0.1 Start_Stop_Chan_2 BOOL FA LSE

+0.2 Start_Stop_Chan_3 BOOL FA LSE

+0.3 Start_Stop_Chan_4 BOOL FA LSE

+0.4 Start_Stop_Chan_5 BOOL FA LSE

+0.5 Start_Stop_Chan_6 BOOL FA LSE

+0.6 Start_Stop_Chan_7 BOOL FA LSE

+0.7 Start_Stop_Chan_8 BOOL FA LSE

+1.0 CoordinationByte BYTE B#16#81 Start/stop byte enable = 1

=2.0 END_STRUCT

Name Type Initial Value Commentary

Start_Stop_Block STRUCT

1: Start channel

C bit = 0/counter mode

Example: The CM35 has module start address 256.

L W#16#FF81 // Start all channels
T PQW 258 // Module start address + 2
...

...

L W#16#0081 // Stop all channels
T PQW 258 // Module start address + 2

In DO mode ²automatic,² the related output is switched on when a channel
starts. The output is switched off with stop even when the comparison value
has not yet been reached.

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CM35 Counter Module

5.4 Controlling the Digital Outp uts

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You can control the digital outputs of the CM35 as shown bel ow, based on
the parameterization of DO mode.

DO mode:

Automatic: Note:

A parameterization bit can be used to specify whether
the DO byte is to control the enable
or whether the enable is continuous.

Enable mode = ²²²²Enable control via DO byte²²²²

The DO byte is used to enable the out put for
control via the counter status.

0: Output disabled

-- The output is not switched on with the start of
counting.

-- A switched on output is forcibly switched off.

1: Output enabled

-- The output is switched on at start of counting.

-- The output is switched off when the comparison
value i s reached or counting is stopped.

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Enable mode = ²²²²continuous enable²²²²

Control via the counter status is continuously enabled for
the outputs. A switched on output can be forcibly switched
off with the DO byte.
0: A switched on output is forcibly switched

off.
(The forced switch--off only affects the current
counting procedure.)

1: No effect

CPU control: You specify the state of the output with the DO

byte.
0: Switch off output
1: Switch on out put

Write the DO byte to t he address ²module start address + 0.²

Note

Control of the digital outputs must be programmed with a word access.

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Table 5-13 shows the assignment of the bits of the DO byte to the counting
channels.

Table 5-13 Assignment of the DO byte

Address

+0.0 Digital_Output_Chan_1 BOOL FAL SE DO mode ²²²²CPU control²²²²:

+0.1 Digital_Output_Chan_2 BOOL FAL SE

+0.2 Digital_Output_Chan_3 BOOL FAL SE

+0.3 Digital_Output_Chan_4 BOOL FAL SE

+0.4 Digital_Output_Chan_5 BOOL FAL SE

+0.5 Digital_Output_Chan_6 BOOL FAL SE

+0.6 Digital_Output_Chan_7 BOOL FAL SE

+0.7 Digital_Output_Chan_8 BOOL FAL SE

+1.0 Res_1 BYTE B#16#0 In reserve

=2.0 END_STRUCT

Name Type Initial Value Co mmentary

DO_Block STRUCT

0: Digital output off
1: Digital output on

²²²²

e

automa

0: Digital output off

1: Digital output enabled

Note:

You can use a parameterization bit

to s

ecif

hether enablingis to be
controlled with the DO byte or
hhrnin

used.

nli

Example (S7): Set outputs 1 and 5

- Parameterize DO mode with CPU control

- The CM35 has the module start address 256.

L 2#0001_0001_0000_0000 // Load DO byte to set outputs

1 and 5

²²²²

c

:

T PQW 256 // Module start address = 256

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CM35 Counter Module

5.5 Hardware Interrupt Evaluation

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When in ²pulse counter² mode, the CM35 can trigger a hardware interrupt
when a comparison value is reached. If this is used, the CPU must contain a
hardware interrupt OB (OB 40).

The start information of OB 40 contains the following information.

-- The variable OB40_MDL_ADDR contains the base address of the
module which triggered the interrupt.

-- The variable OB40_POINT_ADDR contains information on the event
which caused the interrupt.

The variable OB40_POINT_ADDR consists of four bytes. The hardware in­terrupt information of the CM35 in ²pulse counter² mode is entered in the
low byte (local byte 11 of OB 40).

By evaluating local byte 11, you can determine which channel triggered the
interrupt. Remember that more than one bit can be set.

Table 5-14 Assignment of the hardware interrupt information (OB 40/local byte 11)

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Local Byte

11 0 Counter 1 has reached comparison value. 0/1

Bit Meaning Value Range

1 Counter 2 has reached comparison value.

2 Counter 3 has reached comparison value.

3 Counter 4 has reached comparison value.

4 Counter 5 has reached comparison value.

5 Counter 6 has reached comparison value.

6 Counter 7 has reached comparison value.

7 Counter 8 has reached comparison value.

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5.6 Reading the Counting Values

In ²pulse counter² mode, you can read the current counting values from the
CM35.

To ensure data consistency, the read--access must be performed with one load
command (L PIW).

Table 5-15 shows the addresses of the individual channels for reading the
counting value.

Table 5-15 Assignment of the output area for reading the counting values

Offset to the

Module Start Address

+0 Counting value,

+2 Counting value,

+4 Counting value,

+6 Counting value,

+8 Counting value,

+10 Counting value,

+12 Counting value,

+14 Counting value,

Meaning Value Range

channel 1

channel 2

channel 3

channel 4

channel 5

channel 6

channel 7

channel 8

Example: ²Pulse counter² mode

- Read counting value of counting channel 4

- The CM35 has the module start address 256.

0 to 65535

L PIW 262 // Address = 256 + 6, counting value of

channel 4

T MW16 // Save the counting value

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CM35 Counter Module

Period Duration Measurement Operating Mode

6

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6.1 Function Description

In this operating mode, the CM35 uses period duration measurement to ac­quire small frequenci es.

The CM35 measures the e xact time between two falling edges of the count­ing signal by counting the pulses of an internal precision-quartz reference
frequency. The period duration of the input signal is calculated from the
counting value afte r a period, divided by the reference frequency (in kHz).

Example:

-- Counting value = 100

-- Reference frequency = 100 kHz (standard value)

tingMode

100

= 1 msec ( 1 kHz)

100 kHz

Þ Period duration = 1 msec or frequency = 1 kHz

Measuring range

At a measuring value width of 16 bits and a reference frequency of 100 kHz,
period duration measurements between 655 msec (counting value 65500) and
1 msec (counting value 100) can be performed with a resolution of 1% with­out switching the range.

Note

The resolution depends on the lower counting value (i.e., the minimum
period duration).

The reference frequency can be adjusted for measurement of longer period
durations. The following table shows the reference frequencies and the result­ing measuring range.

Table 6-1 Measuring ranges

Counting

Range

16 bits 100 65500 100 kHz 655 msec to 1 msec

Lower

Counting

Value

Upper

Counting

Value

Reference Frequency Measuring Range

(1.53 Hz to 1 kHz)

50 kHz 1,310 msec to 2 msec

(0.76Hzto500Hz)

25 kHz 2,620 msec to 4 msec

(0.38Hzto250Hz)

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CM35 Counter Module

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Period number

Starting and stop­ping measurement

To eliminate inaccurate measurements, you can also perform the measure­ment over several periods of the input signal (1 to 40).

An average value can be calculated at the end of the measuring interval.

Measuring interval

1st meas. 2nd meas. 3rd meas. 1st meas.

Input
signal

Reference
signal

Figure 6-1 Principle of period duration measurement over 3 periods of the input signal

Start

The user program starts the individual channels. After a channel is started,
the period duration is acquired based on the parameterization. The channel
must be stopped before a new measurement can be made .

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6.2 Parameterization

This chapter shows you available parameterizations in ²period duration mea­surement² mode which you can use to adj ust the reaction of the measuring
channels to your task.

The parameter data are located in a parameter block. For the structure of the
parameter block, see chapter 6.2.2. The description of the individual parame­ter data include s the number of the paramet er block and the offset in the
structure.

You must transfer parameter block 1 to the CM35 before you can use ²period
duration measurement² mode.

Note

The channel must be stopped before it can be reparameterized.

You must stop the channel before you can change the channel--specific pa­rameters.

tingMode

The new parameters take effect the next time the channel is started.

For a description of the general layout and the transmission of the parameter
block, see chapter 4.2.

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6.2.1 Description of the Parameter Data

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Period number

Measuring range

When you specify the number of periods, you determine the number of peri­ods of the input signal during which the measurement is to be performed.

You can specify the number of periods for each channel separately.

Table 6-2 Setting of the number of periods

Variable:

Number of Periods

PeriodNumber_Chan_1 1 2.0 Byte 1to40

PeriodNumber_Chan_2 1 3.0 Byte

PeriodNumber_Chan_3 1 4.0 Byte

PeriodNumber_Chan_4 1 5.0 Byte

PeriodNumber_Chan_5 1 6.0 Byte

PeriodNumber_Chan_6 1 7.0 Byte

PeriodNumber_Chan_7 1 8.0 Byte

PeriodNumber_Chan_8 1 9.0 Byte

Parameter

Block

Offset Data Type Value Range

By selecting the measuring range, you can al so increase the period duration
which is measured.

The parameterized measuring range applies to all channels.

Table 6-3 Setting the reference frequency

Variable:

Measuring Range

F_RefFrequency 1 10.0 Byte 0h: 100 kHz (standard)

Parameter

Block

Offset Data

Type

Value Range

(655 msec to 1 msec)

77h: 50 kHz

(1310 msec
to2msec)

EFh: 25 kHz

(2620 msec
to4msec)

Note

A change in the F_RefFrequency parameter only takes effect with the first
parameter transfer a fter a warm restart (power on).

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6.2.2 Structure of the Parameter Block

Table 6-4 shows the data structure of the parameter block and how to transfer
it to the CM35 using SFC 55 calls or I/O direct accesses.

The first word of the parameter block contains the control word. The struc­ture shows the required assignment as an initial value.

When I/O direct accesses are parameterized (only possible with the
SIMATIC S5), the acceptance structure must be transferred after the data
structure. See table 6-5. The table shows the required assignment of the ac­ceptance structure as an initial value.

Adhere to the specifications in chapter 4.2 which apply to transmission of the
data.

Parameter block 1 contains the following information.

-- The period numbers for channels 1 to 8

-- The factor for reference frequency (measuring range)

Table 6-4 Parameter block 1, data structure

Address

+0.0 Control_word WORD W#16#12 Parameter block no. 1/

+2.0 PeriodNumber_Chan_1 BYTE B#16#1 Period number, channel 1

+3.0 PeriodNumber_Chan_2 BYTE B#16#1 Period number, channel 2

+4.0 PeriodNumber_Chan_3 BYTE B#16#1 Period number, channel 3

+5.0 PeriodNumber_Chan_4 BYTE B#16#1 Period number, channel 4

+6.0 PeriodNumber_Chan_5 BYTE B#16#1 Period number, channel 5

+7.0 PeriodNumber_Chan_6 BYTE B#16#1 Period number, channel 6

+8.0 PeriodNumber_Chan_7 BYTE B#16#1 Period number, channel 7

+9.0 PeriodNumber_Chan_8 BYTE B#16#1 Period number, channel 8

+10.0 F_RefFrequency BYTE B#16#0 Factor for reference frequency

+ 12.0 Res_12 WORD W#16#0 In reserve

= 14.0 END_STRUCT

Name Type Initial Value Commentary

Para_Block_1_Data STRUCT

²period duration measurement² mode

Table 6-5 Parameter block 1, acceptance structure (only with SIMATIC S5)

Address

Para_Block_1_Accept STRUCT

+0.0 Control_word WORD W#16#52 Consistency bit = 1/

=2.0 END_STRUCT

6-6

Name Type Initial Value Commentary

parameter block no. 1/
²period duration measurement² mode

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CM35 Counter Module

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6.3 Starting and Stopping the Measuring Channels

After parameterizing the module, you can start and stop the indivi dual mea­suring channels of the CM35. To do this, write the start/stop block to address
²module start address + 2.²

Table 6-6 shows the contents of the start/stop block. The required assign­ment of the coordination byte is entered as an initial value in the structure.
For a description of the bit assignment of the coordination byte, see chapter

4.3.1.

Table 6-6 Start/stop block

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Address

+0.0 Start_Stop_Chan_1 BOOL FA LSE 0: Stop channel

+0.1 Start_Stop_Chan_2 BOOL FA LSE

+0.2 Start_Stop_Chan_3 BOOL FA LSE

+0.3 Start_Stop_Chan_4 BOOL FA LSE

+0.4 Start_Stop_Chan_5 BOOL FA LSE

+0.5 Start_Stop_Chan_6 BOOL FA LSE

+0.6 Start_Stop_Chan_7 BOOL FA LSE

+0.7 Start_Stop_Chan_8 BOOL FA LSE

+1.0 CoordinationByte BYTE B#16#82 Start/stop byte enable = 1

=2.0 END_STRUCT

Name Type Initial Value Commentary

Start_Stop_Block STRUCT

1: Start channel

Cbit=0

²Period duration measurement²

mode

Example: The CM35 has the module start address 256.

L W#16#0382 // Start channels 1 and 2
T PQW 258 // Module start address + 2

to

...

L W#16#0182 // Stop channel 2/

channel 1 still active

T PQW 258 // Module start address + 2

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6.4 Controlling the Digital Outp uts

Since no function is assigned to the digital outputs in ²period duration mea­surement² mode, they c an be used as desired.

The DO byte is used to specify the state of the digital outputs.

0: Switch off output
1: Switch on output

The m odule firmware switches off the outputs during the transition of the
CPU to the STOP state (BASF/OD signal)

Write the DO byte to address ²module start address
+0.²

Table 6-7 shows the assignment of the bits of the DO byte to the measuring
channels.

Note

Control of the digital outputs must be programmed with a word access.

.

Table 6-7 Assignment of the DO byte

Address

+0.0 Digital_Output_Chan_1 BOOL FAL SE

+0.1 Digital_Output_Chan_2 BOOL FAL SE

+0.2 Digital_Output_Chan_3 BOOL FAL SE

+0.3 Digital_Output_Chan_4 BOOL FAL SE

+0.4 Digital_Output_Chan_5 BOOL FAL SE

+0.5 Digital_Output_Chan_6 BOOL FAL SE

+0.6 Digital_Output_Chan_7 BOOL FAL SE

+0.7 Digital_Output_Chan_8 BOOL FAL SE

+1.0 Res_1 BYTE B#16#0 In reserve

=2.0 END_STRUCT

Name Type Initial Value Co mmentary

DO_Block STRUCT

0: Digital output off

Example (S7): Set outputs 1, 3 and 5

-- The CM35 has the module start addre ss 256.

L 2#0001_0101_0000_0000 // Load DO byte to set outputs

1, 3 and 5

output on

T PQW 256 // Module start address = 256

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6.5 Hardware Interrupt Evaluation

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Hardware interrupts are not generated in ²period duration measurement²

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6.6 Reading the Measured Values

You can read the current measuring values of the CM35 in ²period duration
measurement² mode.

To ensure data consistency, the read access must be performed with one load
command (L PIW).

When an overflow occurs, the hex value FFFDH (65533) is transferred (fre­quency below the minimum frequency, encoder interrupted, and so on).

Measuring channels which have not yet been started are transferred with the
value 0000H regardless of whether or not pulses are present on the input.

Table 6-8 shows the addresses of the individual channels for reading the mea­sured value.

Table 6-8 Assignment of the output area for reading the measured values

Offset to the

Module Start Address

+0 Period duration average value, chan. 1 0 to 65532

+2 Period duration average value, chan. 2

+4 Period duration average value, chan. 3

+6 Period duration average value, chan. 4

+8 Period duration average value, chan. 5

+10 Period duration average value, chan. 6

+12 Period duration average value, chan. 7

+14 Period duration average value, chan. 8

Meaning Value Range

Example: ²Period duration measurement² mode

-- Read the measured value of channel 2

-- The CM35 has the module start addre ss 256.

L PIW 258 // Address = 256 + 2, measured value

channel 2

T MW16 // Save the counting value

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Timer Operating Mode

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7.1 Function Description

Timer mode can be used to implement precisely defined switch--on times for
the 8 digital outputs of the counter module.

Switch--on times

Start and stop
timers

Controlling the
outputs

Times from 10 milliseconds to 278 minutes can be specified seperately for
the switch--on times.

The timers are started by the user program, thus setting the related digital
outputs.

If no parameter values for time base and factor are available when a timer is
started, these values are processed with 1 as the default value.

The related digital output is switched off after the parameterized time
expires.
A started timer can be terminated by transferring the control word with a ²0²
for the applicable channel in the start/stop byte. This resets the digital output
and the internal counter.

The end of the switch--on time is indicated by a hardware interrupt. This can
be acquired by the user program to trigger additional processing (e.g., to
position the next container in proportioning systems/filling systems).

A timer must be stopped before the user program can execute a new start.
This can be done after the ²timer expired² hardware interrupt or after a time
calculate d by t he user program which is with certainty longer than the run
time of the timer.

The digital outputs of the timer can also be controlled by writing the DO byte
(e.g., for continuous switch--on during washing procedures). The user pro­gram must ensure that the timer channels cannot be manipulated
(see chapter 7.4).

Monitoring the
outputs

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The module can monitor the switching status of its outputs. To do this, the
digital outputs must be wired to the digital inputs. The firmware cyclically
compares the status of the digital outputs with the status of the digital inputs
and generates a hardware interrupt when required by the parameterization
(e.g., timer failure). The interrupt can be output as a group interrupt or as a
selective interrupt (i.e., channel--specific).

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7.2 Parameterization

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This chapter describes possible parameterization in timer mode which you
can use to adapt timer reactions to your task.

The parameter data are divided into three parameter blocks. For the structure
of the parameter blocks, see chapter 7.2.2. The descriptions of the individual
parameter data include the number of the parameter block and the offset in
the related structure.

To be able to utilize ²timer² operating mode, you must transfer parameter
blocks 1, 2 and 3 to the CM35.

Note

The timer must be stopped before it can be reparameterized.

-- When you want to change timer--specific parameters, you must stop

-- When you want to change timer--overlapping parameters, you must

the applicable timer.

stop all timers.

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The new parameter data take effect when the timer is started again.

For a description of the general layout and transfer of the parameter blocks,
see chapter 4.2.

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