Bei-sensors MHK5 Absolute Hollow Shaft Encoder Bedienungsanleitung

Absolute Rotary Encoder with Profibus-DP-Interface DPC1B version User Manual

3.2 Overview encoder configurations - functionality Designation Cyclic communication Programmable parameters Additional functions Class 1 Singleturn

3.3 Encoder configurations - data format Configuration Description Designation Hex Dec. Input words (Encoder -> Master) Output words (Master ->

Page 12 BEI Sensors Profibus Manual serie M Revision 03/10 4 Class 1 and Class 2 profile The encoder versions Class 1 and Class 2 are defined by t

4.1.1 Code sequence The parameter „code sequence“ defines the counting direction of the position value. The code increases when the shaft is rotating

4.1.6 Total measuring rangeThe parameter „total measuring range“ is used to adapt the measuring range of the encoder to the real measuring range of th

For multiturn devices with 16384 revolution the rule is as follows (if it is necessary to turn the encoder shaft more than 4096 revolutions without po

Data bits Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Master → MHM5 1 0 Transfer of

5 Special versions 2.1 and 2.2 The manufacturer-specific encoder configurations 2.1 and 2.2 offer (in addition to the functions according to the

5.1 Parameter In the following the manufacturer specific parameters are described in detail. The parameters according to the Profile for Encoders are

5.1.3 Desired Measuring units reference With this parameter the reference for the desired measuring units (cp. 5.1.2) is determined, either - per rev

5.1.2 Desired measuring units ...181 ...3General5.1.3 Desired Measur

5.1.4 Activate commissioning mode Bit 2 in octet 26 activates the commissioning mode. This is a special mode with the option to set further parameters

Octet 26 Bit 5 Lower limit switch 0 Deactivated 1 Activated Octet 26 Bit 6 Upper limit switch 0 Deactivated 1 Activated 5.1.7 Physical impulse

4096 steps/revolution x 3 revolutions = 12288 steps Enter this value (12288) as „physical impulses“ and set the „desired measuring units“ to 400. Now

5.2 Data exchange in normal operation With the manufacturer-specific versions 2.1 and 2.2 the process value generally is transmitted as 32-bit-value

5.3 Commissioning mode If the commissioning mode is activated in the encoder parameters, the scaling factor can be determined directly in the machine

5.3.2 Teach-In Start After the machine / system has been moved to the start-position the Teach-In-Start command is transmitted to the encoder. The dev

In order to replace the encoder later without a new Teach-In procedure, the total measuring range determined with the Teach-In should be transferred

6 Diagnostic messages 6.1 Overview On request of the master the encoder transmits diagnostic data ("DDLM_Slave_Diag"). The diagnostic data

6.2 Supported diagnostic messages In the following the different diagnostic messages are described in detail. 6.2.1 Extended diagnostics header Byte

Revision 03/10 BEI Sensors Profibus Manual serie M Page 29 6.2.11 Zero offset The zero offset is output in diagnostic bytes 32 to 35. 6.2.12 Progra

8 ...37Technical Data8.1 Electrical Data...378.2 Certificates

6.3 Status indication by the LEDs in the connection cap LED grün / greenLED rot / red Two LEDs are implemented in the connection cap. They optically

7 Configuring with STEP 7 In the following the configuration of the encoder with the configuration tool STEP 7 is shown exemplarily. In this exampl

7.2 Configuring the encoder After inserting the Profibus master system in the hardware configuration (“Insert” – “Master System”) the encoder can

7.3 Selecting the encoder version As described in chapter 3 the functionality of the encoder depends on the selected encoder version. After the “ enco

7.4 Setting the parameters Select the encoder in the hardware configuration and double click slot one in the configuration table of the encoder. The d

Due to the old versions of software tool STEP7 32-bit parameter values (e.g. total measuring range, software limit switches) have to be divided into h

Page 36 BEI Sensors Profibus Manual serie M Revision 03/10

8 Technical Data 8.1 Electrical Data General design According to DIN VDE 0160 Protective Class III, degree of pollution 2, over voltage Category I

8.3 Mechanical Data Housing Aluminum, optional stainless steel Lifetime Dependent on shaft version and shaft loading – refer to table Max. shaft lo

9 Dimensioned Drawings Synchro flange (S)available in 2 versions Synchro flange d / mm l / mm Version S06 6f6 10 Version S10 10h8 20 Clamp f

shaft position over up to 16384 revolutions (14 bits). The position value is calculated in an integrated microprocessor and transmitted over the Profi

Hollow shaft (B) Mounting instructions The clamp ring may only be tightened if the shaft of the driving element is in the hollow shaft. The diam

10 Appendix 10.1 Type designation / ordering code Description Type Key MHM5 MHK5 DP C1 B - _ _ _ _ - _ _ _ _ - _ _ _ Interface Profibu

Page 42 BEI Sensors Profibus Manual serie M Revision 03/10 Accessories and Documentation Description Article name Article number Aluminium housin

10.2 Further encoder configurations The encoder versions described in the following are still supported for reasons of downward compatibility. They sh

10.3 FAQ absolute encoder Profibus Problem There are problems with the profibus network (bus error, no answer from the encoder) if one of the followi

Problem Sporadic bus errors Possible cause Terminating resistors not correct Possible solution Check terminating resistors! The resistors of 220 Ω m

GSD file File that contains slave-specific characteristics. The GSD file is supplied by the manufacturer of the profibus slave. The GSD format is s

Revision 03/10 BEI Sensors Profibus Manual serie M Page 47 11 Index B Bus termination ... 5 C Class

12 Revision index Revision Date Revision Changed to new type key DPC, new technical drawings, new connection cap 9.4.2010 03/10 4.5 Page 48

2 Installation The Absolute Encoder is connected with a connection cap. This cap is connected to the encoder with a 15-pin-D-Sub connector and can b

2.2 Connecting bus lines and power supply AB+ B+A Clamp Description B (left) Bus line B (Bus in) A (left) Bus line A (Bus in) - 0 V + 10 – 30 V B

2.4 Assignment for M12 connectors (AH58-B1DP-072) Connecting the data lines and the power supply ABAB++ON0987654321x10x1R098765432112345325413241

2.5 Connecting the screenTo achieve the highest possible noise immunity shielded cables should be used for data transmission. The shield should be con

3 Device Configuration The Absolute Encoder with Profibus-Interface can be programmed according to the needs of the user. The GSD-file has to be ins