HBM MP85A Operating Manual

Download

Page 1

Operating Manual

English

MP85A Program Help

Page 2

Hottinger Baldwin Messtechnik GmbH Im Tiefen See 45 64239 Darmstadt Tel. +49 6151 803-0 Fax +49 6151 803-9100 info@hbm.com www.hbm.com

DVS: a3387-1.1 HBM: public

12.2016

Subject to modifications. All product descriptions are for general information only. They are not to be understood as a guarantee of quality or durability.

Page 3

Contents Page

1 Quick start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.1 The MP85A measuring system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.2 What needs to be done?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1.3 Setting up the hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1.4 Firmware update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2 SYSTEM settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.1 General settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.2 Using passcodes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.3 Interface parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3 Prepare MP85A for your application. . . . . . . . . . . . . . . . . . . . . . . . 23

3.1 Setup of the measuring chain (MP85A and transducer). . . . . . . . . . . 23

3.1.1 Specifying a transducer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.1.2 Adjusting the measuring chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

3.1.3 Signal conditioning (zero balance, low-pass filter) . . . . . . . . . . . . . . . 40

3.2 What needs to be considered when zero balancing and how long

does it take? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

3.3 How are the sample rate and filter settings connected?. . . . . . . . . . . 43

3.3.1 Transducer test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

3.3.2 What is the procedure for a transducer test and what needs to be

considered? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

3.4 Additional functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

3.4.1 Limit values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

3.4.2 Digital outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

3.4.3 Digital inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

4 Settings for monitoring using tolerance windows . . . . . . . . . . . . 55

4.1 Principle procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

4.2 The Configure evaluation parameter window . . . . . . . . . . . . . . . . . . . 58

4.3 Control settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

4.3.1 Maximum measuring time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

4.3.2 Start conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

MP85A

a3387-1.1 en HBM: public 3

Page 4

Contents

4.3.3 Stop conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

4.3.4 End conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

4.4 Alarm window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

4.5 Range window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

4.6 Test measurement (start measurement manually) . . . . . . . . . . . . . . . 74

4.7 Important information about tolerance windows . . . . . . . . . . . . . . . . . 76

4.8 Defining tolerance windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

4.8.1 Creating and modifying tolerance windows . . . . . . . . . . . . . . . . . . . . 80

4.8.2 Window active. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

4.8.3 Consider window result in total result . . . . . . . . . . . . . . . . . . . . . . . . . 82

4.8.4 Crossing window with min/max evaluation . . . . . . . . . . . . . . . . . . . . . 83

4.8.5 Crossing window with evaluation of the y mean . . . . . . . . . . . . . . . . . 83

4.8.6 Crossing window with evaluation of the x mean . . . . . . . . . . . . . . . . . 84

4.8.7 y limit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

4.8.8 x limit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

4.8.9 Block window (end window) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

4.8.10 Switch test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

4.8.11 Haptic test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

4.8.12 Evaluation in real time window option (online window). . . . . . . . . . . . 91

4.8.13 Consider window sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

4.8.14 Window option y coordinates relative . . . . . . . . . . . . . . . . . . . . . . . . . 99

4.8.15 Window option x coordinates relative to . . . . . . . . . . . . . . . . . . . . . . 101

4.8.16 Evaluation for entry and exit of window . . . . . . . . . . . . . . . . . . . . . . 104

4.8.17 Statistics and distribution (bin counting) . . . . . . . . . . . . . . . . . . . . . . 113

5 Monitoring with tolerance band: settings. . . . . . . . . . . . . . . . . . . 119

5.1 Principle procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

5.2 The Configure evaluation parameter window . . . . . . . . . . . . . . . . . . 122

5.3 Control settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

5.3.1 Maximum measuring time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

5.3.2 Start conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

5.3.3 Stop conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

5.3.4 End conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

5.4 Alarm window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

5.5 Range window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

a3387-1.1 en HBM: public MP85A

Page 5

Contents

5.6 Test measurement (start measurement manually) . . . . . . . . . . . . . . 138

5.7 Defining a tolerance band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

6 Monitoring with envelope curve . . . . . . . . . . . . . . . . . . . . . . . . . . 143

7 Saving results, data storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

7.1 Storage medium MultiMediaCard/SD Card (target MMC/SD Card

internal). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

7.2 Storage medium external (storage via CAN bus or Ethernet). . . . . . 148

7.3 Storage methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

7.4 Files to save . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

7.5 File names and directories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

7.6 File formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

7.7 Save statistical data, statistical processing. . . . . . . . . . . . . . . . . . . . 157

8 SAVE/LOAD PARAMETERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

9 MEASURE + VISUALIZE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

9.1 Display current values (measurement display) . . . . . . . . . . . . . . . . . 165

9.1.1 Possible error messages and instructions for correction . . . . . . . . . 168

9.1.2 What limitations apply for (transducer) scaling? . . . . . . . . . . . . . . . . 171

9.2 Measurement curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

9.3 Results of the last measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

9.4 Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

9.4.1 3D graph . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

9.4.2 Distribution (bin counting) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

9.5 Retrieve saved data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

9.6 Files on MMC/SD Card (copy to/from PC) . . . . . . . . . . . . . . . . . . . . 183

10 Plus tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

11 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

11.1 Change log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

11.2 Display connection loss detection. . . . . . . . . . . . . . . . . . . . . . . . . . . 187

12 FAQ: Questions and answers about MP85A and PME

Assistant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

12.1 How do I adjust the interface on the MP85A?. . . . . . . . . . . . . . . . . . 189

12.2 How do I set the IP address on my PC? . . . . . . . . . . . . . . . . . . . . . . 192

MP85A

a3387-1.1 en HBM: public 5

Page 6

Contents

12.3 How do I connect the PME Assistant to the MP85A? . . . . . . . . . . . . 195

12.4 How do I recognize the file system on my PC and which should

I use? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196

12.5 How do the options in the start window of the PME Assistant

work? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197

12.6 What happens when connecting additionally to an existing

Ethernet connection? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199

12.7 Requirements for MMC/SD Cards . . . . . . . . . . . . . . . . . . . . . . . . . . 200

12.8 How are the sample rate and filter settings connected?. . . . . . . . . . 201

12.9 What does the data reduction do and how do I set it up?. . . . . . . . . 201

12.10 What possibilities are there to start, stop and end the

measurement? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

12.11 How do I work when setting up the evaluation criteria? . . . . . . . . . . 219

12.12 What needs to be considered when zero balancing and how

long does it take? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220

12.13 What is the procedure for a transducer test and what needs to

be considered? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221

12.14 What limitations apply for (transducer) scaling? . . . . . . . . . . . . . . . . 222

12.15 What has to be considered with parameter set switching?. . . . . . . . 223

12.16 How to determine changes to the device settings? . . . . . . . . . . . . . 224

12.17 Which error messages exist for the measuring/the process

status and how can I correct errors?. . . . . . . . . . . . . . . . . . . . . . . . . 224

12.18 What do the error messages with tolerance window violation

mean? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226

12.19 What do the LEDs on the MP85A mean? . . . . . . . . . . . . . . . . . . . . . 234

12.20 What should be observed when saving process data, curves or

process results? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236

12.21 How does the timing diagram for a process-optimized

measurement look like? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238

12.22 How does the timing diagram for a measurement with no data

loss look like? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239

12.23 How can a digital output be set?. . . . . . . . . . . . . . . . . . . . . . . . . . . . 239

12.24 How do I create a protocol printout of a process? . . . . . . . . . . . . . . 240

12.25 How to transfer all MP85A settings to another device (cloning)? . . . 241

a3387-1.1 en HBM: public MP85A

Page 7

Contents

12.26 How do I carry out a firmware update and can the update be

prevented? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242

12.26.1 Download firmware update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242

12.26.2 How to update the firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243

12.27 What does a tolerance band look like? . . . . . . . . . . . . . . . . . . . . . . . 243

12.28 What does an envelope curve look like? . . . . . . . . . . . . . . . . . . . . . 244

12.29 What is TEDS? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244

13 Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247

MP85A

a3387-1.1 en HBM: public 7

Page 8

Contents

a3387-1.1 en HBM: public MP85A

Page 9

1 Quick start

The help for the PME Assistant consists of three parts:

• The general PME Assistant Online Help.

• The help for the devices MP01, MP30, MP55, MP60

• This document on the MP85A.

1.1 The MP85A measuring system

The MP85A measuring system comprises the PME Assistant program and the PME MP85A or MP85A DP hardware. The MP85A DP is provided with a PROFIBUS interface in addition to the CAN bus and Ethernet interface. The mode of operation is however the same. The device parameters must be set either via the CAN bus or the Ethernet interface for both systems. If you have an older MP85, please use the PME Assistant provided for this device (up to Version 2.2).

Quick start

and MP70 of the PME family.

MP85A

The MP85A can be used for two different monitoring operations:

1. Monitoring a process with verification of a certain process curve using tolerance windows.

The measured values are checked at different points by the MP85A to see whether the sequence lies within a certain range (tolerance window).

2. Monitoring a process for adherence to a tolerance band or envelope curve.

a3387-1.1 en HBM: public 9

Page 10

Quick start

Starting with firmware version 2.22 the limit value results can be included into the OK/NOK evaluation with all monitoring methods.

There is also Version MP85A-S for switch and haptic test with tolerance windows. However tolerance band monitoring is not possible with these devices.

You can find more information about MP85A, e.g. measurement sequence, the data reduction function or the relation between the filters used and sample rate, in section FAQ: MP85A and PME Assistant

1.2 What needs to be done?

The following steps must be performed in order to prepare the MP85A measuring system for a measurement. The steps can be divided into two sections.

Setting up the hardware: connect transducer (sensor),

set up bus system or interface, connect power supply etc.

 This part of the setup is described in detail in

the MP85A Operating Manual. This online Help comprises only a summary.

2. Setting up the device via PME Assistant software. Set up the device using this software and a PC which

is connected to the MP85A via CAN bus or Ethernet interface as described in this Help.

Procedure

1. Start the PME Assistant, see also PME Assistant Online Help: Start options.

a3387-1.1 en HBM: public MP85A

Page 11

Quick start

2. Connect to the MP85A, see How do I connect the

PME Assistant to the MP85A?.

3. Define the MP85A system settings: Select the

guage, set the synchronization if using more than one

device and, if required, set the

Setup of the measuring chain (MP85A and transducer).

5. Determine and enter the start and evaluation criteria for the process: depending on the evaluation mode either for See also

Specify the necessary outputs (process results).

Save all parameters.

The structure of the MP85A settings tree in the left-hand side of the program window corresponds to the sequence in which you should carry out the settings.

Tolerance windows or Tolerance band. EASYteach for envelope curves.

passcode.

lan-

MP85A

 If these steps have already been performed, the data can

be loaded from a file into the device, see

PARAMETERS.

1.3 Setting up the hardware

This section is described in detail in the MP85A Operating Manual. To summarize:

• Connect the transducers.

• Connect the power supply.

a3387-1.1 en HBM: public 11

SAVE/LOAD

Page 12

Quick start

• Connect the bus system and set parameters

(addresses and transmission speed, etc.) if necessary. Because some of these settings are important for the program function, you will also find the most important settings described in Configuring the

MP85A interface(s).

• Check the (hardware) synchronization if several

devices are involved.

• Install the software on the PC, see also PME Assis-

tant Online Help: Operating requirements and PME Assistant Online Help: Installation of software PME Assistant.

The first channel is always displayed as the x channel (horizontal axis) and the second as the y channel (vertical axis) in the graphs. Please connect the transducers suitably so that a correct display of y(x) is achieved.

1.4 Firmware update

You update the firmware using the program PME-Update. With the program a new firmware version can also be transferred to several devices simultaneously.

With the MP85A process controller, in order to avoid interfering with the running of a process (no measurement or evaluation is carried out during an update), from firmware version 2.22 you can specify that the firmware is updated only after manual confirmation on the device (F-update: allowed!). If confirmation does not occur within 15 minutes, then no change to the firmware is made. Refer also to

General settings (basic settings).

a3387-1.1 en HBM: public MP85A

Page 13

Quick start

The device settings are also retained when updating the firmware. However, we recommend a backup is carried out before the update; refer to Store settings and system

parameters saved on the PC (backup).

MP85A

a3387-1.1 en HBM: public 13

Page 14

Quick start

a3387-1.1 en HBM: public MP85A

Page 15

2 SYSTEM settings

2.1 General settings

For passcodes see the separate section Using the pass-

code.

 The general settings are identical for all parameter sets.

SYSTEM settings

Some details in the SYSTEM are for information only, e.g. hardware revision or device serial number. Besides that, you can carry out the following settings:

Language

Next to Sprache (or Language or Langue), if English is not set, select the desired language. Normally, the language version of the PME Assistant determines the language of the MP85A, i.e. when you start the German version of the Assistant, all menus and texts are also in German.

General settings section

 After choosing a different language, all the windows are

refreshed and formed anew. The language of the main menu (at the top in the window) as well as of the messages output by the program are however dependent on the language version of the program, PME Assistant, and are not changed.

Device name

Use the device name to improve the identification of a device in a group of several PMEs.

MP85A

a3387-1.1 en HBM: public 15

Page 16

SYSTEM settings

 In the menu Data storage the option Keep device name

The device name does not affect the operation of the device.

on parameter change specifies that when loading a parameter set the device name is retained, i.e. it is not overwritten by the name saved in the parameter set.

Date/time

The date and time are only used for saving the results. The displayed time corresponds to that at the last window update, e.g. on calling the dialog. Therefore an exclamation point is displayed behind the time. The entered time is sent to the PME, when, after making a change, you quit the entry field by either clicking another field or pressing

Hardware synchronization

You have to carry out this setting if you are using more than one device. In this case you set one device as the Master and all others as Slave. This prevents the carrier frequency measuring amplifiers of the individual devices interfering with one another over transducer cables that run parallel. However, only the measuring amplifiers are synchronized, not, say, the CAN bus interfaces or similar functions. You will find further information on this topic in the MP85A operating manual.

Firmware update only possible after release on the device

Here you define whether a firmware update may always take place or only when it has been confirmed on the device itself. This means that you can inhibit a firmware

a3387-1.1 en HBM: public MP85A

Page 17

SYSTEM settings

update from starting via the network for all devices, e.g. in a running process (during an update no measurement or evaluation occurs). The update is then only executed after manual confirmation on the device (F-Update: Per- mitted!). If the confirmation does not occur within 15 minutes, then no change to the firmware is made.

2.2 Using passcodes

A passcode can be set, thus allowing you to block unauthorized access. This is a number. Letters are not allowed therefore we use the word passcode, not password.

If you have forgotten your passcode, use the master passcode 1702, to reset the system and to allow you to enter a new passcode.

Menu commands and dialogs can be permanently blocked from the EASYsetup module. If you do not have one of the entries listed in this Help, then the MP85A has been configured specially for you.

(FASTpress Suite) program

MP85A

Prepare passcode usage (activate) The passcode must first be defined under SYSTEM



General settings and the field Specify passcode. Turn on the function with Activate passcode?



Yes. When-

ever you then start the PME Assistant program, you will only be able to access the menu command SYSTEM



Passcode entry and the MEASURE + VISUALIZE menu items.

a3387-1.1 en HBM: public 17

Page 18

SYSTEM settings

Use SYSTEM General settings and Reactivate passcode to hide all passcode protected menu items and dia-

logs. If those menus shall be accessed again, a new passcode entry has to be made.

Passcode entry

If the MP85A is protected by a passcode, you can only access this menu item and menu MEASURE + VISU- ALIZE. The correct passcode must be entered before you can access all other menus. If still some menus are missing, your MP85A is customized with program module Assistant configuration.

2.3 Interface parameters

The dialog displays the parameters for the interfaces installed, e.g. also the MAC address of the Ethernet interface. Most settings can only be changed on the device itself, see

With CAN bus the output rate (in multiples of 0.1 ms) and the format for PDO messages (cyclic PDOs) can be set in the dialog. The cyclic PDOs must however be started with an interface command.

With an MP85ADP (with PROFIBUS option) you can set the PROFIBUS address.

When using Ethernet you may also specify here a gateway address. Use IPGatew1 to IPGatew4 to type in the four parts of the gateway IP address. Gateways are used, for example, to be able to reach other IP segments or to send data via other protocols (network types).

Configuring the MP85A interface(s).

a3387-1.1 en HBM: public MP85A

Page 19

SYSTEM settings

See also Options, Display connection loss detection. You can find the interface commands in the MP85A Operating Manual “Interface Description CAN/Profibus/Ethernet”.

Configuring the MP85A interface(s)

Ethernet interface

Parameterization can only be carried out manually; in the PME Assistant the parameters for the interface are only displayed. The PME Assistant software must not be connected to the MP85A over this interface during configuration.

On the MP85A enter the Ethernet address (IP address) and the subnet mask. Operation with dynamic addresses (DHCP) is not possible. You should clarify with your network administrator which IP address (Ethernet address) and subnet mask you have to set. If you only want to establish a direct link between a PC and the MP85A, you can use any address, e.g. 192.168.169.xxx. The last group of three figures (xxx) must be a number between 1 and 254 and different for the PC and the MP85A. Make sure in this case that your PC can switch over the Ethernet connection to a direct link or use a "crossover cable" (not a normal Ethernet cable).

MP85A

Setting the address and subnet mask on the MP85A:

1. Press the SET key for at least two seconds. The display CAN BUS appears.

2. Press the + key until ETHERNET appears in the display.

a3387-1.1 en HBM: public 19

Page 20

SYSTEM settings

3. Press the SET key.

The MAC address is displayed.

4. Press the + key so that the first group of the IP

address appears.

5. Press SET to be able to change the value with + or -. Otherwise press + to proceed to the next group.

6. If you have changed a number, press the SET key.

7. After the display of the IP address you come to the display of the subnet mask. Change this according to your requirements.

8. To save the changes press the SET key for at least two seconds.

The flashing display Save? appears.

9. Confirm it by pressing SET. In the second line a flashing double arrow and the text

Yes appear.

10. Confirm this query also by pressing SET.

CAN bus interface

You can only change most parameters manually; the PME Assistant software must not be connected to the MP85A over this interface during configuration. Terminate the program if necessary.

 You do not need to terminate or close the online help

when you terminate the PME Assistant software.

Setting the baud rate on the MP85A

1. Press the SET key for at least two seconds. The display CAN BUS appears.

a3387-1.1 en HBM: public MP85A

Page 21

SYSTEM settings

2. Press the SET key again. The baud rate display appears together with the cur-

rently set value.

3. Press the SET key once again. A flashing double arrow appears on the left in front of

the display of the current baud rate.

4. Press the + or - keys to change the value.

5. When the desired figure appears in the display, press the SET key.

6. Now press the SET key for at least two seconds. The flashing Save? display appears.

7. Confirm it by pressing SET. In the second line a flashing double arrow and the text

Yes appear.

8. Confirm this query also by pressing SET.

PROFIBUS interface (only with MP85ADP)

MP85A

In the PME Assistant only the PROFIBUS address can be set. All other PROFIBUS system parameterization is carried out via appropriate software from other manufacturers, e.g. PROFIBUS software from Siemens.

a3387-1.1 en HBM: public 21

Page 22

SYSTEM settings

a3387-1.1 en HBM: public MP85A

Page 23

Prepare MP85A for your application

3 Prepare MP85A for your application

 All parameters can also be loaded from a file into the

MP85A with SAVE/LOAD PARAMETERS PC.

Before you can start a measurement, you must enter, measure or read out the relevant transducer data from TEDS. Then define the criteria for the process monitoring and define the values to be output or saved (

window settings or Tolerance band settings).

See also LOAD PARAMETERS, Hardware synchroniza-

tion, Display current values

3.1 Setup of the measuring chain (MP85A

and transducer)

Transducers with TEDS

Load from

To le r an c e

MP85A

For transducers with TEDS it is usually sufficient if you go to PREPARE MEASUREMENT and activate the options Find and use TEDS on device

restart and Find and use TEDS during operation of device. After restarting the MP85A (switch power supply

off and on again), a search will be made for transducers with TEDS. They will be activated if found. If you cannot restart or if no full bridge, half bridge or LVDT transducer is connected, click on Find and use TEDS, see also

Using TEDS.

a3387-1.1 en HBM: public 23

Amplifier TEDS

Page 24

Prepare MP85A for your application

Transducers without TEDS

If you do not have a TEDS transducer, carry out the following steps to set up and adjust the measuring chain:

1. Enter type of transducers (sensors) used.

2. Enter measuring range, unit and required number of places after the decimal point.

3. Calibrate and adjust the measuring chain.

4. Enter other measuring parameters, e.g. low pass filter.

5. Check that the measuring chain is functioning correctly.

Different menus are used for these tasks. The easiest way is to go through these one at a time and make the relevant adjustments. Two different procedures may be used to adjust the measuring chain (step 3). These can be accessed from the Enter characteristic or Measure characteristic menus. The two procedures together with their advantages and disadvantages are described in

Adjusting the measuring chain.

No process (no measurement) is started as long as a transducer error is present and the MP85A is not capable of measuring.

 You can find more information about MP85A, e.g. working

speed, the data reduction function or the relation between the filter used and sample rate in section

and PME Assistant.

See also LOAD PARAMETERS, Display current values,

FAQ: Meaning of the LEDs on the MP85A

a3387-1.1 en HBM: public MP85A

FAQ: MP85A

Page 25

Prepare MP85A for your application

3.1.1 Specifying a transducer

If you have activated the options Find and use TEDS when restarting devices or Find and use TEDS in running operation in one channel using PREPARE MEA-

SUREMENT

ually select the transducer type in any of the channels. If required, deactivate these options to be able to make a selection and then activate them again.

Depending on the type of transducer, you must provide details in the Transducer dialog for the general amplifier settings in the MP85A.

Label the channels using names. They are shown in all other dialogs and simplify assignment.

The channel names must not include the special characters <, >, / or \.

Amplifier TEDS, you cannot then man-

MP85A

 In this dialog only the basic values for the (maximum pos-

sible) measurement range are set. The details for the actual scaling, i.e. the assignment between the actual reading and the displayed physical quantity is set via the scaling; refer to

acteristic .

The required data can be found on the data sheets for the relevant transducers. Some examples of the possible selections are listed in the following.

a3387-1.1 en HBM: public 25

Set characteristic curve or Measure char-

Page 26

Prepare MP85A for your application

Full bridge

Strain-gauge transducers for force, pressure or weight are full bridges and require a measuring range of at least 2mV/V: setting 4mV/V. Instead of strain-gauge trans- ducers, piezoresistive transducers are also used for larger measuring ranges. In cases of doubt check the details in the transducer data sheet.

Half bridge

Inductive displacement transducers are typical transducers in the half-bridge configuration. Usually, they require a measuring range of 80 mV/V at a supply voltage of 2.5 V: setting 100 mV/V. Newer displacement trans- ducers can also be operated in a full-bridge circuit; in this case choose this setting, because better interference suppression is obtained. Inductive transducers can however also operate according to the LVDT principle (Linear Vari- able Differential Transformer); here it is essential to use the LVDT setting for this transducer type. Usually, you need a measuring range of 1 V/V for LVDT transducers. We recommend that the this type of transducer.

characteristic is measured for

Potentiometer

Potentiometer types of transducer are often used for the measurement quantities of displacement and angle. A measuring range of 1 V/V is set automatically for these transducers (fix); internally, the MP85A uses the same circuit as for half bridges. We recommend that the

characteristic is measured for

this type of transducer.

a3387-1.1 en HBM: public MP85A

Page 27

Prepare MP85A for your application

LVDT

The LVDT principle (Linear Variable Differential Trans- former) is often used for inductive displacement transducers where the measuring ranges are 500 mV/V up to

1V/V. However, displacement transducers with a half bridge and output signals below 100 mV/V are also

common, so check the details in the data sheet.

10 V

You can, for example, also connect active transducers via this input. The measuring range is permanently set to 10 V (fix).

Pulse generator

Pulse generators (pulse counters) or incremental transducers are transducers which facilitate the acquisition of, for example, a rotational speed via a digital signal. If two digital signals are available, you can also measure, e.g. rotational speed and rotational direction. If the transducer has an output for the zero index (z channel, home position), then you can also calculate the rotated angle. Since all edges are evaluated with this transducer type, a correct conversion must follow using the subsequently defined scaling (refer to or deactivate the rotational direction and zero index depending on the transducer and connection you are using.

Set characteristic curve). Activate

MP85A

 The measurement of frequency is not possible.

a3387-1.1 en HBM: public 27

Page 28

Prepare MP85A for your application

SSI generator

For transducers with the SSI interface (Synchronous Serial Interface) you have to set the coding used (stan-

dard: Gray code), the resolution used and the transfer speed. Multi-turn shaft encoders (many revolutions can be measured) usually use 24 or 25 bits to code the position, whereas single-turn transducers normally use only 12 or 13 bits. The transfer speed mainly depends on the length of the cable to the transducer. The maximum baud rate of 1000 kbaud can only be used up to a total length of 200 m. Please check the admissible values for your transducer (see transducer data sheet).

With transducers with the SSI interface the measurement is always read out 1200 times per second by the MP85A in response to an acceptance signal sent to the transducers.

Time

Instead of a transducer you can also define time as a

transducer type (y(t) plots). In this case only one channel is monitored over time and used for the evaluation.

For the Decimal point you can specify the number of displayed decimal places, but the resolution of the measure-

ments is not affected by this.

 The number of decimal places set here is also used for

the output in INTEGER format via the interface. You define the physical unit via Unit. If you are using a

TEDS transducer, you can define via PREPARE MEA-

SUREMENT

the unit included in the TEDS is to be used. However, the unit must in this case be convertible, otherwise you

Amplifier TEDS that this unit and not

a3387-1.1 en HBM: public MP85A

Page 29

Prepare MP85A for your application

receive the TEDS error "Unit conversion not possible." Therefore, you can, for example, convert Pa (pascal) into bar or psi, but not N (newton) into mm (millimeter).

 For active transducers, incremental transducers or trans-

ducers with the SSI interface the supply can be provided via the MP85A (5 V) or an external power supply unit (10 … 30 V). The setting is made using a switch in the device; further information on this can be found in the MP85A operating manual.

3.1.2 Adjusting the measuring chain

If you have activated the options Find and use TEDS on device restart or Find and use TEDS during operation of device for one channel using PREPARE MEASURE-

MENT

the characteristic for any channel. If necessary, deactivate these options to be able to carry out an adjustment and then reactivate them.

Amplifier TEDS, you can no longer measure

MP85A

If you are carrying out these settings for the first time, please see the information given in section

and comparison of the procedures. Experienced users

can go straight to one of the two procedures.

See also Status information and FAQ: Possible error mes-

sages and instructions for correction

a3387-1.1 en HBM: public 29

Introduction

Page 30

Prepare MP85A for your application

3.1.2.1 Introduction and comparison of the proce-

dures

Transducers with linear characteristic must be used for all procedures, i.e. transducers where the input quantity (physical), e.g. force, and the output quantity (electrical), e.g. mV/V, show a linear connection. In other words: for linear force sensors, the outgoing signal is twice as high when the force is double. Non-linear transducers are, for example, thermo-elements. Here, the outgoing signal is not twice as high when the temperature is double. As soon as a linear behavior is true (as is the case for most transducers), the adjustment is simplified to the definition of a straight line, the characteristic (curve) of the sensor. The values required are called the transducer character- istic and must be entered so that the measured physical force, displacement, angle quantities, etc. can be displayed correctly. The characteristic can be established either from a calibration protocol or data sheet (nominal values) or determined from a measurement.

The measured value can only be displayed in physical units with the help of this assignment “which display should appear for which measured value”. Three procedures can be used to determine this assignment:

1. Using a transducer with TEDS module The data from the transducer calibration is saved in

the TEDS module. Advantage: You only need to activate the correspond-

ing options in the TEDS menu, the other settings will be carried out automatically; incorrect settings are excluded.

Disadvantage: Errors caused by improper installation of the transducer are not recognized. For example, a

a3387-1.1 en HBM: public MP85A

Page 31

Prepare MP85A for your application

transducer that is mounted at an angle to the load input direction will only measure a part of the force exhibited. This error can only be recognized by calibrating with direct load.

2. Entry of the characteristic or nominal values (sen-

sitivity and range)

Advantage: fairly simple to perform. Disadvantage: The procedure cannot be used for all

transducers. For example, it cannot be used for inductive transducers. Faults caused by improper installation of the transducers are not recognized: A transducer which is mounted at an angle to the load input direction will only measure a part of the force exhibited. This fault can only be recognized through a measurement with direct load. If the values are only taken from a general data sheet, there may be larger differences depending on the type of transducer. This is shown in the data sheets as sen- sitivity tolerance or allowed sensitivity deviation. It is therefore preferable to enter the actual sensitivity from the calibration protocol of the transducer.

3. Measuring the characteristic with real load or dis-

placement, etc., i.e., comparison by measuring two points in the range to be measured

Advantage: Faults caused by incorrect installation of the sensor are recognized, the entire measuring chain is checked with this measurement.

Disadvantage: This procedure is time-consuming; the calibration standards for an exact measurement are generally expensive and not always procured easily.

MP85A

a3387-1.1 en HBM: public 31

Page 32

Prepare MP85A for your application

You must select one of these operations depending on the type of transducer to ensure the required measurement uncertainty.

 Inductive transducers should always be measured as

complete measuring chains, i.e. with the cable and channel which will be used for the measurement, to ensure as few measuring errors as possible.

3.1.2.2 Using TEDS

For transducers with TEDS it is usually sufficient if you activate the options Find and use TEDS on device

restart and Find and use TEDS during operation of device. After restarting the MP85A (switch power off and

on again), a search will be made for transducers with TEDS. They will be activated if found. If you cannot restart or if no full bridge, half bridge or LVDT transducer is connected, you must click on Find and use TEDS.

If you have activated the options Find and use TEDS on

device restart or Find and use TEDS during operation of device for one channel, you can no longer change the

settings for any channel via the Transducer or Enter characteristic menus and the Measure characteristic

menu is not accessible. Deactivate these options at least temporarily in order to be able to use these dialog windows and adjust the settings for a channel without TEDS.

In order to display another unit than the one saved in the TEDS module, you can activate the option Convert TEDS unit into current unit. In this case, it must be possible to convert the unit; otherwise the TEDS error “unit conver-

a3387-1.1 en HBM: public MP85A

Page 33

Prepare MP85A for your application

sion not possible” will be issued. You can, e.g. convert Pa (Pascal) into bar or psi, but not N (Newton) in mm (Millimeter). First read out the TEDS module, then go to PRE-

PARE MEASUREMENT

define the required unit. As last step activate your TEDS options. Otherwise the unit used will be changed to that in the TEDS and can then no longer be changed.

Carry out a zero balance if you have changed the unit or the conversion.

indicates that a TEDS module has been recognized

in the channel.

indicates that all TEDS settings that could be carried out by the MP85A have been activated. (For example the template “Calibration table” is not supported as the MP85A can only make linear scaling.)

indicates that not all settings could be activated. You

will receive further information about the error in the TEDS error frame.

Amplifier Transducer and

MP85A

indicates that no TEDS module has been found.

 To sav e t he TEDS dialog settings permanently, you must

use

SAVE/LOAD PARAMETERS Save to Flash. The

settings can be different for each parameter set.

3.1.2.3 Entering the Transducer Characteristic

If you have activated the options Find and use TEDS when restarting devices or Find and use TEDS in running operation in one channel using PREPARE MEA-

a3387-1.1 en HBM: public 33

Page 34

Prepare MP85A for your application

SUREMENT Amplifier TEDS, you cannot then set

the characteristic curve in any of the channels and can only display the set values. If required, deactivate these options to be able to make entries and then activate them again.

Two points are always needed for setting the characteristic curve, but they need not necessarily be the zeropoint and full scale reading. To keep the measurement deviations (errors) as small as possible the points applied should however lie at the limits of the range of the relevant physical quantity later used. For example, if you load a force transducer with forces between 10% and 50% of the nominal load, you can also use these values.

 The electrical values of the characteristic curve must lie

within the selected measuring range. With a 4 mV/V measurement range you must not enter 5 mV/V for xx kN.

The transducer sensitivity stated in the calibration certificate corresponds to the span (difference) in the output signal between the two points "Transducer unloaded" and "Transducer with nominal load". Therefore, when entering the sensitivity as the second point, normally you enter zero for the first point.

 The deviation of the zero value from the zero-point in the

current installation situation can be corrected later via the

zero balance.

With inductive transducers you should always measure

the characteristic.

a3387-1.1 en HBM: public MP85A

Page 35

Prepare MP85A for your application

 The scaling can extend from 1/30 of the measuring range

for 1,000,000 digits resolution to 10 digits resolution for the whole measuring range. With usage as a counter or with SSI transducers the scaling can be between 20 digits for one pulse (1:20) and 10,000 pulses per displayed digit (10,000:1).

Relationship between input signal, characteristic curve and display

MP85A

In this graph force is used as the physical quantity, but displacement or pressure could be used similarly instead. The illustration may have been produced, for example, during the measurement of the sensitivity values on the calibration certificate in a testing machine. (The zero value of the transducer after installation in the testing machine is also adjusted to zero here before the measurement.)

a3387-1.1 en HBM: public 35

Page 36

Prepare MP85A for your application

Enter characteristic curve: Example 1

Force transducer with sensitivity 2.00147 mV/V (calibration certificate) at 50 kN nominal load

Transducer: Measuring

range

Zero-point electrical 0

Zero-point physical 0

Sensitivity electrical 2.00147

Nominal value physical 50

4mV/V

 After these entries call the Signal conditioning dialog and

adjust the zero-point.

Enter characteristic curve: Example 2

Transducer with 5 V output voltage at 20 bar pressure (relative pressure transducer)

Transducer: Measuring

range

Zero-point electrical 0

Zero-point physical 0

fix (10 V)

Sensitivity electrical 5

Nominal value physical 20

 After these entries call the Signal conditioning dialog and

adjust the zero-point.

a3387-1.1 en HBM: public MP85A

Page 37

Prepare MP85A for your application

Enter characteristic curve: Example 3

Potentiometric transducer with 150 mm nominal measuring displacement

Transducer: Measuring

range

Zero-point electrical -500 mV/V

Zero-point physical 0

Sensitivity electrical 1000 mV/V

Nominal value physical 150

fix (1 V/V)

 We recommend that the characteristic is measured for

this transducer type.

Enter characteristic curve: Example 4

Rotary encoder (rotated angle) with 720 pulses per revolution (360°) on two channels

Zero-point electrical 0

Zero-point physical 0

Sensitivity electrical 2880 (see note)

Nominal value physical 360

MP85A

 Since all edges are counted, four times the counting

pulses is obtained.

a3387-1.1 en HBM: public 37

Page 38

Prepare MP85A for your application

3.1.2.4 Measure transducer characteristic

If you have activated the options Find and use TEDS on device restart or Find and use TEDS during operation of device for one channel using PREPARE MEASURE-

MENT

the characteristic for any channel; the menu cannot be accessed. If necessary, deactivate these options to allow you to carry out the adjustment and then reactivate them.

Two points are always required to measure a transducer characteristic. However these need not be zero point and end value (full scale or range). To keep the measurement differences (errors) as small as possible, the points should lie on the limits of the range used of the respective physical quantity. If, for example, you use a force transducer only between 10% and 50% of the nominal load, these values can also be measured. Usual values are zero point and 80% of the measurement range used.

Amplifier TEDS, you can no longer measure

The measured values should not lie too close together. Example: If the measurement is done using 0% and 5% of the measuring range, a difference of 0.1% in the second measurement point (5%) will lead to an error of 2% at full scale reading (measuring range).

 The electrical values of the transducer characteristic must

lie within the selected measuring range. With 4 mV/V measuring range (SG transducers), a measured value of e.g. 80 mV/V (inductive transducers) leads to overloading,

Transducer error is then shown in the Display current values window.

a3387-1.1 en HBM: public MP85A

Page 39

Prepare MP85A for your application

Procedure

1. Go to the first point on the characteristic curve, e.g.

move the displacement transducer to the starting position. With force and zero as selected point on the characteristic: unload (release) the transducer.

2. Enter the corresponding physical value under 1st

point physical, e.g. 0.

3. Click on Measure 1st point. The value measured by

the MP85A appears under 1st point electrical.

4. Go to the second point on the characteristic curve,

e.g. set displacement with end gauges, set force value with a weight set or use a reference transducer, etc.

5. Enter the size set under 2nd point physical, e.g.

40 kN or 60 mm.

6. Click on Measure 2nd point. The value measured by

the MP85A appears under 2nd point electrical.

MP85A

 Use Shunt: On to activate the shunt built into the MP85A.

This resistor (87,1 k 2 and results in a signal of approximately +1 mV/V with a 350

 transducer. You can use the signal as control

signal, because it should always produce the same

reading, after the system has been calibrated. However, it is not possible to use this signal for calibration purposes because the exact reading cannot be calculated.

Note for inductive displacement transducers

When using inductive transducers with measuring range in positive and negative directions, ensure that the pro-

cess range lies within the specified measuring range (usable displacement range) for the transducer. This is

a3387-1.1 en HBM: public 39

) is switched in parallel to bridge arm

Page 40

Prepare MP85A for your application

always specified symmetric to the mechanical zero point of the transducer and therefore must be determined first:

1. Set the Zero value to 0 (enter 0 and press ) in the

Signal conditioning dialog.

2. Call the Display current values window via MEA- SURE + VISUALIZE.

3. Move the transducer core until the output signal displays zero again.

This mechanical zero point is however unimportant for measuring the characteristic curve. The zero point for the display can be set at any position on the measuring range.

3.1.3 Signal conditioning (zero balance, low-pass

filter)

In this dialog window the zero signal of the transducer in the existing installation is determined and eliminated for further measurements (set to zero). See also Timing diagram of a zero balance.

Procedure for zero balancing

1. Unload the transducer, i.e. move the system into the “zero position”.

2. Click on Zero balance.

 The measured electric signal is converted to the physical

unit via the entered or measured If the measured zero value of both channels should apply

for all parameter sets, i.e. it should not be changed when the parameter set is changed, select Do not overwrite for

a3387-1.1 en HBM: public MP85A

characteristic.

Page 41

Prepare MP85A for your application

Overwrite zero value on change of parameter set. The

setting always applies to both channels and independent setting is not possible.

When a value is entered in the Zero reference, this is then always displayed if the value shown under Zero value is measured. The function can be used, for example, to display a displacement measurement in the range 100 mm to 150 mm correctly, although only one 50 mm displacement transducer is used. Measure the zero value (Zero balance) in the position 100 mm and enter 100 as Zero reference. This value is then added to all following measurements.

Low-pass filter

The signals can be filtered to improve the quality of the signal: Low-pass filter. Here you can activate a low-pass filter (several different limit frequencies are available) to cut off noise which disturbs the signal. However the setting affects the maximum possible sample rate, see Sample rate and filter settings.

MP85A

The limit frequency set must lie far enough above the maximum signal frequency so that the process measurement is not influenced. In case of doubt, perform the measurements using different filter frequencies and compare the results. For instance, check that fast signal changes are registered correctly.

Notes

• Low pass filters are filters of the fourth degree with

Bessel characteristic, and have a relatively wide transmission range between pass-through and stop

a3387-1.1 en HBM: public 41

Page 42

Prepare MP85A for your application

band. More data can be found in the Operating Manual of the MP85A.

• To exclude run-time differences caused by different

filter frequencies, only the same filter frequency can be used for both channels, the other channel will be automatically changed.

3.2 What needs to be considered when

zero balancing and how long does it take?

With low filter cut-off frequencies the filter settling time must be allowed to pass before the zero balance. A pulse of at least 5 ms duration is required on the digital input for the zero balance. The zero balance terminates a further 5ms later. Refer also to

Signal conditioning (zero balance).

 Only level changes, i.e. edges, are evaluated on the dig-

ital inputs.

a3387-1.1 en HBM: public MP85A

Page 43

Prepare MP85A for your application

3.3 How are the sample rate and filter settings connected?

Depending on the filter used, a certain (internal) sample rate is used initially, see table.

Low-pass filter

0.05 Hz 1.15

0.1 Hz 2.3

0.2 Hz 4.6

0.5 Hz 17

1Hz 37.5

2Hz 75

5Hz 150

10 Hz 300

20 Hz 600

50 Hz 1200

≥ 100 Hz 2400

Internal sample rate (in samples per second)

 SSI transducers are always recorded at a rate of 1200

values per second

MP85A

3.3.1 Transducer test

This test is normally used to go to a reference point (measuring point) on the characteristic curve and then check whether this point is correctly reached. Activate the check

a3387-1.1 en HBM: public 43

Page 44

Prepare MP85A for your application

itself, i.e. the measurement and calculation either by a command via the interface or by a digital input. You can read out the status information Transducer test result… via the interface or as a digital output.

Make sure that the correct measuring point (e.g. force transducer unloaded) is used at the time of the test.

Enter the measurement value expected under Reference

value and define the maximum difference under Deviation. Both entries are given in the unit of the channel, e.g.

in kN.

 Do not confuse the transducer test with the transducer

error check that is always carried out, e.g. during the measurement and is displayed in the status. See also Measuring value status and Error messages with the Display current values (measurement display)

With force transducers the zero value can be checked here. If the difference is too large, this could indicate an overload of the transducer in the process. With displacement transducers the starting point could be checked, i.e. whether the reference points of the machine have changed.

See also Additional functions, Digital inputs and Digital

outputs

a3387-1.1 en HBM: public MP85A

Page 45

Prepare MP85A for your application

3.3.2 What is the procedure for a transducer test

With low filter cut-off frequencies the filter settling time must be allowed to pass before the test. A pulse of at least 5 ms duration is required on the digital input for the transducer test. The result is obtained typically a further 10 ms later. Refer also to Transducer test

and what needs to be considered?

for the functioning principle.

 Only level changes, i.e. edges, are evaluated on the dig-

ital inputs.

MP85A

3.4 Additional functions

3.4.1 Limit values

Limit values are typically used for the real-time monitoring of safety-relevant values. Up to four limit values can be monitored for each channel. The four limit values are defined and activated in separate dialogs. To set a digital

a3387-1.1 en HBM: public 45

Page 46

Prepare MP85A for your application

output when a limit value is triggered specify it in the Dig-

ital outputs menu.

 Limit values can be defined, but nevertheless deactivated

(Monitoring: off). In this case all the settings are retained.

Using Graph Graph settings you can display the Limit values as auxiliary lines in the graph.

The function and settings of the limit switches are as commonly used. On reaching the limit value it is designated as active and in the with a red spot. After leaving the hysteresis band, the spot next to LVx is show in gray again. Depending on the switching direction, the hysteresis band lies above or below the limit value.

Activating the limit signaling for Above limit:

Signal reading window LVx is marked

Activating the limit signaling for Below limit:

a3387-1.1 en HBM: public MP85A

Page 47

Prepare MP85A for your application

Considering the status in evaluation

The function Consider status in evaluation enables you to specify values which have to be exceeded or undercut in order that a process is assessed as OK. When activated, these limit values are taken into account in the pro-

cess evaluation in addition to the specified windows, the tolerance band or the envelope curve, i.e. the process is

only evaluated with OK when the limit condition has also been fulfilled (e.g. exceeded with Switching direction: above).

The limit results are also displayed in the window Display

of stored data.

MP85A

3.4.2 Digital outputs

 The status is also displayed in the window Display current

values.

With the digital outputs, certain system statuses can be transferred externally independent of the bus system. The messages Process: Alarm, Process: OK, Process: Started, Process: Busy, Process: Result processed and Tolerance window x OK or Limit value x, channel a are frequently used to output the current status.

a3387-1.1 en HBM: public 47

Page 48

Prepare MP85A for your application

You can also specify whether the Switching logic should be Positive. For active status, e.g. limit value exceeded, the output then has—depending on the power supply— e.g. 24 Volt. If the switching logic is Negative, this level is output when status is inactive. More information about levels and outputs loads can be found in the Operating Manual. You will find diagrams which show the measurement sequence and the corresponding digital levels in section Timing diagrams for different Start/Stop/End con-

ditions.

 Different outputs are available depending on the MP85A

type.

Possible settings

Setting Description

Limit value …, channel …

Error, channel …

Process: Alarm

Process: OK

Process: NOK

The

Limit value status of this channel is output.

There is a measuring error in the channel. This can be a transducer fault (e.g. in the connection), a fault in the A/D converter, the scaling, the amplifier calibration (factory calibration), TEDS error or a gross overflow.

An error occurred during the process or operation. See also

tions

The process or operation was evaluated with OK. See also Error messages for tolerance window viola-

tions

The process or operation was evaluated with NOK (not okay). See also

tions

Error messages for tolerance window viola-

a3387-1.1 en HBM: public MP85A

Page 49

Setting Description

The process or operation has been started.

Process: Started

See also Timing diagrams for different Start/Stop/End

conditions

The operation or process was started.

Process: Running

See also Timing diagrams for different Start/Stop/End

conditions

The operation or process has been finished.

Process: Ready

See also Timing diagrams for different Start/Stop/End

conditions

The operation or process has ended. The result is availProcess: Result processed

able and can be evaluated.

See also

Timing diagrams for different Start/Stop/End

conditions

The output changes between ON and OFF with a freHeartbeat

quency of 1 Hz and can be used as a watchdog func-

tion.

The MultiMediaCard/SD Card is almost full, there are MMC/SD Card memory full

less than 5 megabytes free. Replace the card with a

new one or delete the files.

See also

Replace MMC/SD Card

Prepare MP85A for your application

The internal memory is almost full, there are less than

16 kilobytes free. The message points to a problem

when storing measured data. One reason could be that Internal memory full

the specified PC is not accessible due to a network

problem.

See also

Timing diagrams for different Start/Stop/End

conditions and Save data and results (data storage)

Tolerance window x OKWith this message, individual windows can be checked

and evaluated

MP85A

a3387-1.1 en HBM: public 49

Page 50

Prepare MP85A for your application

Setting Description

Result of a transducer test, corresponds to the result of Transducer test result channel …

Run test under PREPARE MEASUREMENT Ampli-

fier

Transducer test.

See also

Transducer test

Allows you to set a channel using a piezo sensor to zero

until the measuring starts. This allows the zero point drift

of these sensors to be suppressed. The signal corre-

sponds to the signal Process: Ready, i.e. the signal is

Reset Piezosensor

triggered only after the measuring starts.

See also

Timing diagrams for different Start/Stop/End conditions

If you use this option, you may not monitor a start condition for this channel at the same time: this channel is only measured after the measuring process starts.

The digital outputs can be set via via the SDO object 2320 (hex), subindex 0. With this function it is possible

Data word bit …

to pass on individual bits of the bytes transferred with this object to the corresponding outputs, see example below.

Parameter-set number bit x

Loading parameter set

This enables you to determine the number of a parameter set loaded from the flash memory: the parameter-set number is output as binary number with bit 0 to bit4. Parameter sets loaded from the MMC/ SD Card or PC cannot be interrogated.

Using the function you can check the time required for loading a parameter set: the next process can only start after the switchover, which can take up to 200 ms; the MP85A is only ready for measurement again after the switchover. Consequently, as long as the signal is active, no new process can be started.

3.4.3 Digital inputs

 The status is also displayed in the window Display current

values.

a3387-1.1 en HBM: public 51

Page 52

Prepare MP85A for your application

Only changes to the level on the inputs are evaluated, i.e. the flanks.

If you allocate more than one function to the same input, e.g. Zero balance and Clear statistics on Input 1, the functions will be handled in the following sequence: Zero balance—Shunt calibration—Load parameter set— Start/End process—Start transducer test—Clear statistics—Clear total statistics—Save statistics.

 Different inputs are available depending on the MP85A

type. You may use up to four additional “software” digital inputs

with the MP85ADP-S (version for switch and haptic testing), if the single digital input provided by the MP85ADP-S is not sufficient. Four input states may be transmitted via the interface which provides you with five digital inputs in total. However, keep in mind that the speed of a software input is not as fast as the speed of a hardware input. Therefore time delays may occur between these signals and the measured data depending on the bus system used.

a3387-1.1 en HBM: public MP85A

Page 53

Possible settings

Setting Description

Corresponds to the zero adjustment under PREPARE

Zero balance

MEASUREMENT

See also

Signal conditioning

Corresponds to activation of the shunt resistance

Shunt calibration

(Shunt: Enabled) under PREPARE MEASUREMENT

Measure characteristic.

See also

Measure transducer characteristic.

If, for example, only three different parameter sets are required, you can use only two inputs with Load param- eter set bit 0* and bit 1*. It is not necessary to use all

bits (parameter set 0 contains the factory settings). Load parameter set (from flash EPROM)

With the

Signal conditioning you can define whether the

zero value is retained during loading or whether the zero value from the parameter set is used. Use the

Data storage menu to specify that the device

name shall be retained (not overwritten with the name stored in the parameter set) when loading a parameter set.

Prepare MP85A for your application

Amplifier Signal conditioning.

Start/End process

Start transducer test

Clear statistics or clear total statistics

MP85A

This input can be used to start and end a process or a measurement. If you specify further Start, Stop or End conditions, these apply additionally. See also Timing diagram for a measurement with no data loss or Timing diagram for a process-optimized measurement and

Control settings for tolerance win-

dows or Control settings for tolerance band

Corresponds to Run test under PREPARE MEASURE-

MENT

See also

Amplifier Transducer test.

Transducer test

The statistics of the current or all parameter sets are deleted. The OK/NOK process counters are deleted too.

a3387-1.1 en HBM: public 53

Page 54

Prepare MP85A for your application

Setting Description

Corresponds to Save statistical data under PREPARE

Save statistics

MEASUREMENT Data storage. See also

Save statistical data

With a switch test, specify which inputs will be used for the test. The inputs must be connected to a power supply via the switches to be tested so that their status will be recognized. You may use up to four virtual digital inputs with the MP85ADP-S as this device has only one

Switch test1) 1 … 5

digital input available. In this case the state has to be defined using a PROFIBUS command (cyclical transmission). See also

Switch test

The switching time points are also displayed in a haptic test if an input has been allocated. See also

MP85A-S only, i.e. with switch test and haptic test option

Haptic test

Settings for monitoring using tolerance windows

4 Settings for monitoring using tolerance win-

dows

The definition of the evaluation criteria is a multi-stage process that cannot be carried out theoretically as several measurements are required. The measuring chain must therefore already have been completely adjusted, see

Setup of the measuring chain

Go to Specify evaluation mode and enter Window as evaluation mode.

If you change the evaluation mode, you should delete the statistical data as they will not be relevant for the new mode and would lead to an incorrect result (see

graph). You can also clear the process counter from the

Process menu (Configure evaluation parameter window must be open). Resetting the process counter will however also affect the files already created, as the counter will start at 1 when reset.

File names. If necessary, save

MP85A

We recommend that you proceed as described in section

Principal procedure if you are adjusting these settings for

the first time.

•

Principal procedure

• General information about the Configure evaluation

parameters window

•

Control settings

•

Alarm window

• Range window

a3387-1.1 en HBM: public 55

Page 56

Settings for monitoring using tolerance windows

• Important information about tolerance windows

Tolerance windows

•

You ma y Start the measurement sequence manually to determine appropriate windows. Use Graph history mode to display up to five successive measured curves simultaneously, see also

4.1 Principle procedure

 When you first use a new MP85A, the presetting (factory

setting) for the alarm window and the range window corner points are identical, i.e. both windows are on top of each other. The presetting for the corner points is -10/-10 and +10/+10. The alarm window must be larger than all other windows.

Curve

Curve history mode.

Step 1

First go to the alarm and range windows autom. The alarm window will be set to the measuring range of the transducer enlarged by 15% in all directions; the range window will be set to the measuring range enlarged by 10%. The and

y of the data reduction will also be set to practice-

oriented values for these ranges.

Step 2

Check the values on the Alarm window tab. All measured values must lie within this window. These are, e.g. maximum traverse path or maximum force, etc. as well as

Alarm window tab and click on Adjust

x

a3387-1.1 en HBM: public MP85A

Page 57

Settings for monitoring using tolerance windows

the minimum values that could occur as long as the system is operated correctly.

Step 3

Check the Range window

tab. The window covers the operating range that is relevant for the measurement, i.e. the range in which the “important” measured values lie. Thereby you can, e.g. distinguish between the starting path with a pressfit operation and the actual measurement, see figure.

Step 4

Make one or more typical

process measurements manu-

ally.

Step 5

Decide which ranges are relevant for the evaluation and which conditions must be fulfilled so that the process runs as required:

Tolerance windows.

MP85A

Step 6

Set the Start, Stop and End conditions for the process on the

Control settings tab. Check and, if necessary, correct

the data reduction settings and the Alarm and Range window settings.

a3387-1.1 en HBM: public 57

Page 58

Settings for monitoring using tolerance windows

Abb. 1: Example of the application of a range window

4.2 The Configure evaluation parameter window

The first channel is always displayed as the x channel and the second as the y channel in the graph in the Configure evaluation parameter and MEASURE + VISUALIZE dialogs. The top x axis displays relative coordinates (see x

channel relative to) if a reference point has been entered

for one of the tolerance windows. However, relative coordinates can only be used for windows which are to be evaluated after the measurement has ended.

The process number and the number of the measuring points acquired (see right-hand side of the line at the top of the window (toolbar). The line immediately above the graph in the dialog window shows the device name (General set- tings), the active parameter set and the workpiece name (Data storage), if this was set.

a3387-1.1 en HBM: public MP85A

Control settings) is shown on the

Page 59

Settings for monitoring using tolerance windows

Status messages comprise icons and text and are displayed in the bottom line of the dialog window:

indicates a fault in the MP85A

shows that a MultiMediaCard or SD Card has been

inserted

warns that no MMC/SD Card is inserted (appears

only if Save to MMC/SD Card has been activated, see

Save data and results

)

is displayed while data or parameters are being

saved If you place the mouse pointer over one of these icons,

explanatory text is displayed as a tool tip. Note the status line text messages, also in the main program window, for more explanations.

Graph scaling, zoom

MP85A

scales the graph so that the largest window or all

curves will be displayed (Autoscale everything)

scales the graph to fit into the range window (a

margin of 10% will be used)

opens a dialog for manual scaling in which you can

also accept the scaling currently displayed

You can at any time zoom in and out within the graph: keep the left-hand mouse key pressed to mark the area you wish to zoom into and select Zoom from the context

menu. -Z returns to the last display; a maximum of

a3387-1.1 en HBM: public 59

Page 60

Settings for monitoring using tolerance windows

nine zoom steps are provided. Use or go to Graph  Reset zoom to display the full area (alarm window).

Use Graph

Graph settings to display the Curve with

connected points or superimpose a Grid.

4.3 Control settings

First go to the Alarm window tab and click on Adjust alarm and range windows autom. to get suggested

values. The alarm window will be set to the measuring range of the transducer enlarged by 15% in all directions; the range window will be set to the measuring range enlarged by 10%. The also be set to practice-oriented values for these ranges.

So that the amount of data is not increased unnecessarily, the number of values to be checked (and saved) is limited: Data reduction. You must therefore specify how high the resolution should be for the respective channel. As soon as the current measurement for either the x or y channel is larger than the old measurement plus the difference entered, a measured value triple is saved, i.e., the value for both channels plus the time value. A maximum of 4000 values are recorded for processing. The measuring is then stopped and a buffer overrun message is issued. The resolution selected can be seen on each curve after a measurement: the measuring points used for the evaluation are also displayed in the graph (Graph Graph settings Curve with connected points). After

x and y of the data reduction will



a3387-1.1 en HBM: public MP85A

Page 61

Settings for monitoring using tolerance windows

the measurement, the number of actual measuring points acquired will be displayed on the right-hand side of the line at the top of the window (toolbar)..

Only saved values will be checked in the windows.

Make a test measurement and look at the values registered in the graph. If necessary, zoom (hold left-hand mouse key down and drag across the section) to see whether the resolution is sufficient or whether the data reduction values must be reduced.

See also Data reduction, FAQ: MP85A and PME Assis-

tant, Sample rate and filter settings, Digital inputs

Use the Control settings tab to enter the relevant values on the Start, Stop and End condition tabs.

MP85A

4.3.1 Maximum measuring time

With Maximum meas. time, an end criterion must be set. The measurement will end at the latest when this time has elapsed.

If you start a measurement manually, you must either stop

it manually ( ), send an interface command or use the external signal to end the process before the evaluation starts. The interface commands can be found in the MP85A Operating Manual under “Interface Description CAN/Profibus/Ethernet”.

a3387-1.1 en HBM: public 61

Page 62

Settings for monitoring using tolerance windows

As a rule, an End condition is used to end a process.

4.3.2 Start conditions

The following methods are available to you for starting a process:

1. By an External start signal (start/end event

2. By exceeding/undercutting certain values of a channel

(internal start condition, Start above (below) set point).

3. Manually via .

4. By an interface command.

You will find the interface commands in the operating manual “Interface Description CAN/PROFIBUS/Ethernet” of the MP85A.

No process (no measurement) is started as long as a transducer error is present and the MP85A is not capable of measuring.

)

The process is also started when you have chosen starting via an external signal or internal condition and one of the two latter events occurs.

 No start conditions are apparent with an MP85A with older

firmware versions; refer to How do I carry out a firmware update and can the update be prevented?.

4.3.3 Stop conditions

You can stop a process as follows:

a3387-1.1 en HBM: public MP85A

Page 63

Settings for monitoring using tolerance windows

1. Standstill recognition

If the measured signal changes by less than the value entered during the time specified, the process is treated as finished and the evaluation will begin.

2. Above/below reference value + time until stop

(follow-up time) One or both channels can be checked. Enter the ref-

erence value(s) which should be monitored and the time until stop, i.e. the amount of time the measurement should continue once this value has been reached.

The condition is only evaluated if—with below reference—the reference value plus hysteresis has been exceeded once or if—with above reference—the reference value minus hysteresis has been undercut once. The hysteresis (5% of the range window) is required to ensure that noises or small disturbances in the signal do not cancel the measuring at the time t

. The percentage entry refers to the respec-

tive axis of the range window. See Example Stop/End condition: below reference value in x channel and Example Stop/End condition: below reference value in y channel

MP85A

3. Stop at reverse motion of channel x

The operation is stopped as soon as the measured value in the x channel is smaller than the

x entered

for the Data reduction.

4. External end signal (Stop condition None)

a3387-1.1 en HBM: public 63

Page 64

Settings for monitoring using tolerance windows

A digital input (Start/End process), for example from an end switch or the PLC, signals the end. This also stops the process.

Only level changes (flanks) are evaluated.

Notes about the Stop conditions

• In cases 1 to 3, the process will also stop (and finish)

if you have selected External start signal and the level of this signal has again changed (event “End”), if

you click on or if the corresponding interface command is issued. You can find the interface commands in the MP85A Operating Manual “Interface Description CAN/Profibus/Ethernet”.

• All Stop conditions are immediately evaluated using

the (raw) data. They are not evaluated using the values shown in the graphs which have resulted from the data reduction. A graph may display values at different points in time than those actually used for evaluating a Stop condition.

• If both channels are to be checked, for example, for

Below reference value, the condition is considered as fulfilled if the signal drops below the set point on one channel while the other lies statically below the reference value. It is not necessary to have a level change for the second channel. This also applies when using Above reference value: as soon as the condition is met for the first channel, the level of the second channel is evaluated. The condition is considered fulfilled if the level is already higher than the specified reference value.

a3387-1.1 en HBM: public MP85A

Page 65

Settings for monitoring using tolerance windows

For the Below limit condition the hysteresis lies above the reference value.

Abb. 2: Example of stop/end condition: Undercutting ref-

erence value on x channel

MP85A

For the Below limit condition the hysteresis lies above the reference value.

a3387-1.1 en HBM: public 65

Page 66

Settings for monitoring using tolerance windows

Abb. 3: Example of stop/end condition: undercutting a y

channel reference value

4.3.4 End conditions

As long as the End condition is not fulfilled, the data in the RAM will not be saved and no ready message will be issued, i.e. the test stand is stopped.

You can end the measuring of a process as follows:

1. With an external signal (Start/End process

) or manu-

ally via . An interface command works in the same way as the manual control. You can find the interface commands in the MP85A Operating Manual “Interface Description CAN/Profibus/Ethernet”.

a3387-1.1 en HBM: public MP85A

Page 67

Settings for monitoring using tolerance windows

The stop and end time points are the same with an external signal as well as with manual control. The two operating modes can also be mixed, i.e. the process will be ended when you either click on the button or the digital “Stop” signal is issued.

2. You can end the measuring when the Start condition has been left again, i.e. you must also start with an (internal) Start condition.

Example: if “above displacement value” is used as Start condition, this means that the displacement value entered for the Start condition must be undercut again, including a hysteresis of 1% of the related axis of the range window. See Example for leaving the Start condition “Above reference value in x channel” and Example for leaving the Start condition “Above reference value in y channel”

3. With an End condition (internally checked reference value, i.e. measured value of a channel).

MP85A

 In this case the condition is only evaluated if—

with below reference—the reference value plus hysteresis has been exceeded once or if—with above reference—the reference value minus hysteresis has been undercut once. The hysteresis (5% of the range window) is required so that noises or small disturbances in the signal do not cancel the measuring when the time reaches t the respective axis of the range window. See Example End condition: below reference value in x channel and Example End condition below reference value in y channel

a3387-1.1 en HBM: public 67

. The percentage refers to

Page 68

Settings for monitoring using tolerance windows

Notes

• With a process-optimized measurement the ready

message is only set if the End conditions are fulfilled and the values to be saved are in the RAM. The disadvantage of process-optimized measurement is that with fast running processes it may be that not all processes are saved. If there is no space is available in the RAM, the data will be discarded. See also

Storage methods

• With a measurement with no data loss additionally

enough (older) process data must be transferred from the RAM on to MMC/SD Card or PC so that the values from the next measurement will fit into the memory (RAM). If this is not the case, the system must wait, i.e. the test stand is stopped.

For the Above limit condition the hysteresis lies below the reference value

Abb. 4: Example of a start condition: exceeding an x

channel reference value

a3387-1.1 en HBM: public MP85A

Page 69

Settings for monitoring using tolerance windows

For the Above limit condition the hysteresis lies below the reference value.

Abb. 5: Example of a start condition: exceeding a y chan-

nel reference value

MP85A

For the Below limit condition the hysteresis lies above the reference value.

a3387-1.1 en HBM: public 69

Page 70

Settings for monitoring using tolerance windows

Abb. 6: Example of stop/end condition: Undercutting ref-

erence value on x channel

For the Below limit condition the hysteresis lies above the reference value.

a3387-1.1 en HBM: public MP85A

Page 71

Settings for monitoring using tolerance windows

Abb. 7: Example of stop/end condition: undercutting a y

channel reference value

4.4 Alarm window

MP85A

 When you first use a new MP85A, the presetting (factory

setting) for the alarm window and the range window corner points are identical, i.e. both windows are on top of each other. The presetting for the corner points is -10/-10 and +10/+10.

Click on Adjust alarm and range windows autom. to get suggested values. The alarm window will be set to the measuring range of the transducer enlarged by 15% in all directions; the range window will be set to the measuring range enlarged by 10%.The tion will also be set to practice-oriented values for these ranges.

a3387-1.1 en HBM: public 71

x and y of the data reduc-

Page 72

Settings for monitoring using tolerance windows

This window is used to monitor the general system status and to protect against overload. You should enter here the limit values (or these values slightly reduced) for the transducer. As soon as measured values lie outside this window, an alarm message is issued and the process is marked as NOK (not OK). The alarm message can be output via the digital outputs or as interface message.

Do not enter 0 as the lower limit if this value could be reached or if a value even slightly lower may occur during normal operation. Use instead, for example, a value of 1% of the transducer nominal load.

 The alarm window must always be rectangular. Only two

corner points can be entered. The alarm window must be larger than all other windows.

See also Range window, Important information about tol-

erance windows

4.5 Range window

 When you first use a new MP85A, the presetting (factory

setting) for the range window and the alarm window corner points are identical, i.e. both windows are on top of each other. The presetting for the corner points is -10/-10 and +10/+10.

a3387-1.1 en HBM: public MP85A

Page 73

Settings for monitoring using tolerance windows

range enlarged by 10%. The x and y of the data reduction will also be set to practice-oriented values for these ranges.

The range window defines the range which is used to record and evaluate the process.

No values will be recorded outside this window and no check is made with regard to any tolerance window.

 The range window must always be rectangular. Only two

corner points can be entered. The range window must be smaller than the alarm window.

The range window is of advantage if a part of the values measured during the process is not relevant for the evaluation. In figure 1, for example, the section of the curve before the press-fit process starts (marked red) is relatively large and is not necessary for the current evaluation. In practice, the section marked red is not required for the evaluation and is omitted, see figure 2.

MP85A

See also Alarm window, Important information about toler-

ance windows

a3387-1.1 en HBM: public 73

Page 74

Settings for monitoring using tolerance windows

Abb. 8: Example of a process for a range window

Abb. 9: Example of the application of a range window

4.6 Test measurement (start measurement manually)

Start a measurement manually or allow the measurement to be carried out automatically in order to be able to use

a3387-1.1 en HBM: public MP85A

Page 75

Settings for monitoring using tolerance windows

this data to determine the required tolerance windows. The curve should correspond to a typical process. There are two possibilities of doing this:

1. Method 1: Perform measurements using

Start/Stop/End conditions; in doing so you can use digital inputs additionally or exclusively (the measuring starts if the Start condition is fulfilled or the start/end input is set.)

2. Method 2: Use (Start process) and (Stop

process) located at the window top. Use the Start and End conditions External signal on

the Control settings tab, without the signals being present, or Standstill recognition with a correspondingly long time.

No process (no measurement) is started as long as a transducer error is present and the MP85A is not capable of measuring.

MP85A

The status of the measurement (measuring or finished) is shown on the left-hand side of the status line at the bottom of the window. Please note that any window properties may be edited only if a process is ended.

 Measuring reference curves also creates statistical

values. Therefore deactivate the statistical data handling or delete the statistics after such measuring operations. See Statistical data handling VISUALIZE)

See also Control settings, Data reduction

a3387-1.1 en HBM: public 75

, 3D graph (MEASURE +

Page 76

Settings for monitoring using tolerance windows

4.7 Important information about tolerance windows

 See also Consider window sequence, Data reduction

• All windows are monitored simultaneously. The entry

condition(s), i.e. the x or y coordinate, is/are monitored first for each window. If one is fulfilled, i.e. the coordinate is exceeded or undercut, only the exit condition(s) is/are then monitored for this window. The monitoring is unchanged for all other windows.

• If a window has been evaluated once (OK or NOK),

this window is no longer considered in the successive evaluation, even when the curve passes through the window once again. In such cases use several windows and the option Consider window sequence. Each tolerance window has a number, the individual windows can be evaluated in numerical sequence. This means window no. 1 must run before window no.

• The sides where the measurement curve enters and

exits the window must always lie parallel to the coordinate system. The program converts other window

shapes automatically as soon as the corresponding side is defined as entry or exit side. In Fig. 1 at first only the vertical line at x a check will be made to ensure that the value lies within y

and y2, then the exit is monitored and after

that the exit condition will be checked. With an online window (evaluation in real-time) this check is carried out as soon as x

is exceeded. The evaluation NOK

can therefore occur with an online window as soon as x

is exceeded.

a3387-1.1 en HBM: public MP85A

is monitored. If it is crossed,

Page 77

Settings for monitoring using tolerance windows

• If the same coordinate axis is monitored for two win-

dows and the same entry condition, then either the coordinates for windows to be passed consecutively in the direction of the entry condition must also be located one after the other (becoming larger for exceeding or smaller for undercutting) or you must use the option Consider window sequence.

In Fig. 2 (Consider window sequence, example 2) the process is then only evaluated with OK when the window sequence is considered: the entry coordinate y of window 3 is lower than that of window 2 (y exceeded, window 3 would therefore be checked first and evaluated with NOK; window 2 would be evaluated only at y ent a problem, because x condition is greater than x

. The coordinates x1 and x2 do not pres-

in the direction of the entry

and is therefore also only

evaluated later. If a curve has a trace as in Fig. 3 (Consider window

sequence, example 3), then the coordinate x taneously monitored for both windows, but for the first time the curve can only pass through one of the windows. The other window would therefore always be classified as NOK (not OK). Here therefore Consider window sequence would also have to be activated.

). If y1 is

is simul-

MP85A

• If one window should be passed through several

times (e.g. backwards and forwards), the procedure will be identified as OK in this window as long as one run fulfills the conditions defined. However, if the window has been evaluated once, e.g. because the entry condition was fulfilled, the window is no longer considered.

a3387-1.1 en HBM: public 77

Page 78

Settings for monitoring using tolerance windows

• You can use only rectangular shapes for windows with

Real-time evaluation. Only windows which are config-

ured for evaluation after the measurement, can have a shape other than rectangular, e.g. trapezoid or parallelogram.

• The side edges of a window may not overlap. For

example, you cannot pull the bottom right-hand corner over the top right-hand corner.

Abb. 10: Monitoring x on entry

Abb. 11: Consider window sequence: Example 2

a3387-1.1 en HBM: public MP85A

Page 79

Settings for monitoring using tolerance windows

Abb. 12: Consider window sequence: Example 3

Abb. 13: Possible window shapes

MP85A

Abb. 14: Impermissible window shapes

4.8 Defining tolerance windows

Tolerance windows must lie inside the range window.

a3387-1.1 en HBM: public 79

Page 80

Settings for monitoring using tolerance windows

The measured values are evaluated with the help of this window. There are two different methods of evaluation:

1. Real-time evaluation, i.e. during the measurement

Evaluation in real-time is only possible for absolute (not for relative) windows and only rectangular windows can be used.

2. Evaluation when the measurement has finished

The basic settings for tolerance windows can be seen on the Tolerance window tab in the Properties frame. Use Change to call the dialog window and adjust all settings, as well as the information concerning the entry and exit evaluation and which statistical data will be collected (evaluation matrix).

 Limit values are taken into account in the process evalua-

tion in addition to the tolerance windows if Use status in total result is activated, see Limit values

You may also use the EASYteach module (FASTpress Suite) to create or modify tolerance windows, see

EASYteach.

See also Alarm window, Range window, Important infor-

mation about tolerance windows, Test measurement (start measurement manually), Data reduction

4.8.1 Creating and modifying tolerance windows

Creating tolerance windows

Up to nine windows can be defined, four of them may be real-time windows. The windows are created in the graph

a3387-1.1 en HBM: public MP85A

Page 81

Settings for monitoring using tolerance windows

using the mouse and context menu item as tolerance window.

• The individual windows may overlap.

• Windows which are to be evaluated in real-time must

always be rectangular. The program will change the corner points automatically when necessary. The entry and exit sides of tolerance windows must be parallel to the coordinate system.

All windows must be assigned a name and number on creation. If you later select Consider window sequence for the evaluation, the number of the window determines the sequence in which it will be processed. Windows with higher numbers will be processed after those with lower numbers.

If necessary you can insert a window in-between two existing windows. Assign the relevant number. The window already having this number and the following ones will then be renumbered. However, the names will not be changed. Use Rename to change the name of a window.

MP85A

Modifying tolerance windows

• To move a window, click on the window name, hold

the left mouse key down and then drag.

• You can also move the corner points of the window by

holding down the left-hand mouse key.

• Click on the window name in the graph to display the

window settings. Click on Change on the Tolerance window tab to call the properties dialog and change settings.

See also Important information about tolerance windows

a3387-1.1 en HBM: public 81

Page 82

Settings for monitoring using tolerance windows

4.8.2 Window active

You can deactivate a window temporarily. All other settings remain unchanged.

4.8.3 Consider window result in total result

This option allows you to monitor a curve range with a window without the results being considered as OK or NOK in the overall result.

You can either temporarily suppress the evaluation in the overall result for a window or set up an additional window that alerts about even smaller differences than those permitted for a process which is still evaluated as OK. In example 1 manufacturing tolerances are monitored which indicate wearing of certain tool parts (Error 1 to 4).

Abb. 15: Tool wear: Example 1

a3387-1.1 en HBM: public MP85A

Page 83

Settings for monitoring using tolerance windows

4.8.4 Crossing window with min/max evaluation

This is the standard window type. Using Evaluation of

entry and exit and Statistics and class counting, define

which data is to be checked and further processed for the window.

Example: Crossing window with entry and exit conditions (left/right) and the y min/x min statistical data thereby acquired.

MP85A

If the option Evaluate window in real time is active, you obtain an error message (NOK) in the example on the right when the coordinate x

is exceeded.

4.8.5 Crossing window with evaluation of the y mean

The window for this evaluation must be rectangular; the evaluation is carried out after the measurement. The corner points are changed automatically by the program if required. Details about entry and exit are not considered with this evaluation and are also not needed.

a3387-1.1 en HBM: public 83

Page 84

Settings for monitoring using tolerance windows

The actual readings are not evaluated, but rather the y mean, which arises for a section of the x axis of the window.

Example: The mean is obtained of all y readings between x

and x2. Then a check is made of whether this mean lies

within the window shown in red here.

4.8.6 Crossing window with evaluation of the x mean

The actual readings are not evaluated, but rather the x mean, which arises for a section of the y axis of the window.

Example: The mean is obtained of all x readings between y

and y2. Then a check is made of whether this mean lies

within the window shown in red here.

a3387-1.1 en HBM: public MP85A

Page 85

Settings for monitoring using tolerance windows

4.8.7 y limit

 Use the limit values for real-time monitoring of safety-rele-

vant values. The window is displayed as just a single line; all y coordi-

nates are identical and the exit is not evaluated. In the default setting the threshold must be crossed from below to above, but you can change this by changing the entry side.

This type of window is suitable for initiating trigger signals or for monitoring minimum values and is usually combined with the option Evaluate window in real time or Con- sider window sequence.

MP85A

a3387-1.1 en HBM: public 85

Page 86

Settings for monitoring using tolerance windows

Use the Consider window sequence option and define a

digital output

to detect when the trigger threshold is reached.

4.8.8 x limit

which outputs the tolerance window x OK

 Use the limit values for real-time monitoring of safety-rele-

vant values. The window is displayed as just a single line; all x coordi-

nates are identical and the exit is not evaluated. In the default setting the threshold must be crossed from left to right, but you can change this by changing the entry side.

This type of window is suitable for initiating trigger signals or for monitoring minimum values and is usually combined with the option Evaluate window in real time or Con- sider window sequence.

a3387-1.1 en HBM: public MP85A

Page 87

Settings for monitoring using tolerance windows

Use the Consider window sequence option and define a

digital output

to detect when the trigger threshold is reached.

4.8.9 Block window (end window)

With a block or end window the plot only enters the window, but must no longer leave it. This is different to the threshold where the exit is not evaluated at all nor considered. With the block window any exit is evaluated as an error.

which outputs the tolerance window x OK

MP85A

4.8.10 Switch test

 The functions for the switch test are only available with an

MP85A-S (version for the switch test). The switch test checks whether the switch in this window

changes its state. Specify Close as the switching direc- tion when the switch in this window has to change its state from "Open" to "Closed", otherwise specify Open. The check is made via one of the MP85A-S; specify the input used under Switch input. If the switch bounce is to be ignored, activate the appro-

a3387-1.1 en HBM: public 87

digital inputs of the

Page 88

Settings for monitoring using tolerance windows

priate option. Otherwise the switch bouncing is evaluated as NOK.

Note

• This window type cannot be used as a relative

window.

• The evaluation takes place once the measurement

has stopped, i.e. the real-time evaluation cannot be selected.

• The bounce of a switching process (switching on or

off) is evaluated a maximum of 16 times in each case. If further bounces occur, the measurement is interrupted and the evaluation (statistics, etc.) is started. The process is generally labeled with NOK except when all windows have been evaluated with OK, i.e. bouncing only occurs with the last window.

• If the available digital input of the MP85ADP-S is not

sufficient, you can transfer up to four switching events to the MP85ADP-S for evaluation (software input) via the interface.

• In the graphs an I, the number of the digital input and

1 as well as the symbol Close; for Open lx:0 and If, for example, the switch on Digital Input 1 has closed, then above it. In the following example switch-on occurs in the window (OK), switch-off outside (NOK); Input 3 is used as a digital input.

appears as a tag on the plot with I1:1

on the plot are displayed for

as symbol are displayed.

a3387-1.1 en HBM: public MP85A

Page 89

Settings for monitoring using tolerance windows

• No entry or exit sides are needed for this window type.

• In the statistics the minimum/maximum values occur-

ring in the window are not displayed, but rather the switching coordinates, i.e. the coordinates at which the switch has changed its state. In addition to OK or NOK, No switching process is displayed when the switch has not changed its state or Switch process repeated if multiple switching has taken place.

MP85A

4.8.11 Haptic test

 The functions for the haptic test are only available with an

MP85A-S (version for the switch test). The haptic test checks how the switch in this window

changes its state, i.e. the "feel" during operation. Specify the required forces and displacements for this in the haptic test dialog: Set button. You can check only one parameter, a combination of any parameters or all the listed parameters. The test is NOK when one of the activated parameters is not satisfactory. The graph below shows the single parameters.

a3387-1.1 en HBM: public 89

Page 90

Settings for monitoring using tolerance windows

During the haptic test the plot must enter and exit the window at the side and only rectangular windows are admissible. Entry or exit on the upper or underside of the window is not possible.

Verifiable haptic parameters

• Switch actuating force Fa: Specify the minimum

switch actuating force F

amin

force is the force required to move the switch from the inoperative position over the switching point. The maximum switch actuating force F by the upper edge of the window.

an. The switch actuating

is determined

amax

 The entered value for F

is indicated in the

amin

window by a violet line. You can also change the value by clicking and dragging the line.

• Restoration force Fr: Specify the maximum resto-

ration force F

. The restoration force is the force at

rmax

which the spring mechanism switches back. The minimum restoration force F

is determined by the

r min

lower edge of the window.

a3387-1.1 en HBM: public MP85A

Page 91

Settings for monitoring using tolerance windows

 The entered value for F

is indicated in the

rmax

window by a green line. You can also change the value by clicking and dragging the line.

• Differential force: Define the minimum required and

the maximum permissible difference from the actual switch actuating force F force F

and the actual restoration

• Differential displacement: Define the minimum

required and the maximum permissible displacement between the actual switch actuating force F actual restoration force F

and the

• Force/displacement ratio: Define the minimum

required and the maximum permissible ratio between the differential force and the differential displacement.

• Click ratio: Define the minimum required and the

maximum permissible relative differential force. With this test the differential force is calculated in percent of the switch actuating force and compared with the stated values.

4.8.12 Evaluation in real time window option (online window)

MP85A

You can also use this window type for machine and plant protection. In contrast to the alarm window here you can define that the measurements are specially checked in a certain section of the process. However, with this option you can only use a rectangular window. The option also excludes evaluation via relative coordinates (relative window), because they are only fixed after the measurement. For a crossing window with min/max evaluation in

a3387-1.1 en HBM: public 91

Page 92

Settings for monitoring using tolerance windows

real time you obtain an error message (NOK) in the example on the right when the coordinate x

To create a merge window, use a crossing window with min/max evaluation which is evaluated in real time (Example). In addition, define a digital output puts tolerance window x OK. You then receive a message when Point x

is exceeded and the plot has not

entered the window on the left side or if the window is exited above or below in the subsequent progression.

is exceeded.

which out-

A maximum of four windows can be evaluated in real time. The window sequence can also be taken into account with evaluation in real time.

a3387-1.1 en HBM: public MP85A

Page 93

Settings for monitoring using tolerance windows

Abb. 16: Example of a merge window

4.8.13 Consider window sequence

The option is of particular interest when the measured curve passes through a range twice or when, for example, with hysteresis curves a certain sequence is to be maintained when crossing. The option can be selected separately for each window, i.e. you can define windows with and without evaluation of the sequence. However, we recommend that either the option Consider window sequence is activated for all windows or for none. If required, you can place a window between two existing ones by specifying the corresponding number (again). Windows with this number and higher numbers are then renumbered, but the names are retained.

MP85A

The option is indispensable when the same x or y range is crossed twice in the same direction (Example 1) or when, with two windows, the same coordinate axis is monitored for the entry condition and the coordinates for windows to be crossed consecutively in the direction of the entry condition are not positioned consecutively (Example 2): the

a3387-1.1 en HBM: public 93

Page 94

Settings for monitoring using tolerance windows

entry coordinate y1 of Window 3 is lower than that of Window 2 (y

). If y1 were to be exceeded, window 3 would

therefore be checked first and evaluated with NOK; window 2 would be evaluated only at y

If you are evaluating windows normally (after the measurement) as well as in real time (during the measurement), the window sequence is taken into account first only for the real-time windows, i.e. windows occurring in the sequence, which are not to be evaluated in real time, are also not taken into account. All other windows are taken into account only after the measurement.

 The option of whether the next sequence window is moni-

tored (becomes active) when the measured curve has entered the current sequence window or only when the current sequence window has been exited applies to all windows for which the window sequence is monitored. The evaluation of the sequence window with OK or NOK is independent of this, i.e. the exit condition is also checked in the first case. However, the entry condition for the next sequence window is in the second case only monitored once the current sequence window has been exited.

Examples

• In Example 3 the curve must first cross Window 1 and

then Window 2. Since the MP85A always monitors coordinate ranges, with the simultaneous monitoring of both windows without a sequence and the entry and exit directions identified by the blue arrows Window 1 would be evaluated as “OK” (in order) and

a3387-1.1 en HBM: public MP85A

Page 95

Settings for monitoring using tolerance windows

Window 2 as “NOK” (not in order) after the first section of the curve. OK for both windows only occurs when the sequence is taken into account: Since Window 2 is only “active” when Window 1 has been crossed, the same coordinate x

can now be moni-

tored twice.

 The fact that the curve in Example 3 again

crosses Window 1 at the upper corner is not evaluated, because the window has already

been crossed and is therefore no longer considered in the further monitoring. Here, it does not matter whether the window has been evaluated with IO or NIO.

• In Example 4 after passing through Window 1 the

curve enters Window 2 first before passing through Window 3. With the entry and exit directions indicated by the blue arrows the process is labeled as OK, irrespective of whether the sequence is taken into account or not.

• In Example 5 the process is only “OK” when the

sequence is not evaluated, because here the windows

are crossed in the sequence F1

• You can carry out a test also through a suitable selec-

tion of entry and exit conditions. In Example 6 the process is “not OK”, because Window 2 is crossed in the wrong direction. In Example 7 the process is however “OK” and namely independently of whether you are working with Consider window sequence or not: although Window 3 was crossed once in the wrong direction, it was also crossed once in the right direction. Even the sequence F1 tained here, so the process is “OK”. If however, as in Example 8 the Window F2 were larger, then the entry

F3 F2.

F2 F3 was main-

MP85A

a3387-1.1 en HBM: public 95

Page 96

Settings for monitoring using tolerance windows

condition would be infringed and the total process would be “not OK”.

Abb. 17: Consider window sequence: Example 1

Abb. 18: Consider window sequence: Example 2

a3387-1.1 en HBM: public MP85A

Page 97

Settings for monitoring using tolerance windows

Abb. 19: Consider window sequence: Example 3

MP85A

Abb. 20: Consider window sequence: Example 4

a3387-1.1 en HBM: public 97

Page 98

Settings for monitoring using tolerance windows

Abb. 21: Consider window sequence: Example 5

Abb. 22: Consider window sequence: Example 6

a3387-1.1 en HBM: public MP85A

Page 99

Settings for monitoring using tolerance windows

Abb. 23: Consider window sequence: Example 7

MP85A

Abb. 24: Consider window sequence: Example 8

4.8.14 Window option y coordinates relative

With this option you can evaluate the plot relative to the minimum, maximum or mean which has been attained within the second tolerance window. The windows linked in this way are moved upwards or downwards in parallel

a3387-1.1 en HBM: public 99

Page 100

Settings for monitoring using tolerance windows

to the y axis depending on the position of the value. The selected reference point applies to all windows with relative y coordinates.

Note

• Relative coordinates can only be used for evaluation

after the measurement (no evaluation in real time). With this option the second tolerance window is always used as a reference. If required you can create a new "second" window by issuing the number two (again). Windows with this number and higher numbers are then renumbered, but the names are retained.

• You must set the second window for the calculation

which corresponds to the condition applied here, i.e. for the evaluation "relative to the mean" the the second window must be calculated.

y mean in

100

a3387-1.1 en HBM: public MP85A

HBM MP85A Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

1 Quick start

1.1 The MP85A measuring system

1.2 What needs to be done?

1.3 Setting up the hardware

1.4 Firmware update

2 SYSTEM settings

2.1 General settings

2.2 Using passcodes

2.3 Interface parameters

3 Prepare MP85A for your application

3.1.1 Specifying a transducer

3.1.2 Adjusting the measuring chain

3.3.1 Transducer test

3.4 Additional functions

3.4.1 Limit values

3.4.2 Digital outputs

3.4.3 Digital inputs

Settings for monitoring using tolerance windows

4.1 Principle procedure

4.2 The Configure evaluation parameter window

4.3 Control settings

4.3.1 Maximum measuring time

4.3.2 Start conditions

4.3.3 Stop conditions

4.3.4 End conditions

4.4 Alarm window

4.5 Range window

4.7 Important information about tolerance windows

4.8 Defining tolerance windows

4.8.1 Creating and modifying tolerance windows

4.8.2 Window active

4.8.3 Consider window result in total result

4.8.4 Crossing window with min/max evaluation

4.8.5 Crossing window with evaluation of the y mean

4.8.6 Crossing window with evaluation of the x mean

4.8.7 y limit

4.8.8 x limit

4.8.9 Block window (end window)

4.8.10 Switch test

4.8.11 Haptic test

4.8.12 Evaluation in real time window option (online window)

4.8.13 Consider window sequence

4.8.14 Window option y coordinates relative