FISCHER DE43 Operating Manual

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Page 1

Modbus

Operating manual

DE43

Digital 2-channel transmitter

for direct connection to

bus-capable automation devices

09005642 • BA_EN_DE43 • Rev. ST4-A • 11/18

*09005642*

Page 2

| Impressum FISCHER Mess- und Regeltechnik GmbH

Impressum

Manufacturer:

Technical editorial team:

FISCHER Mess- und Regeltechnik GmbH

Bielefelderstr. 37a D-32107 Bad Salzuflen

Telephone: +49 5222 974 0 Telefax: +49 5222 7170

eMail: info@fischermesstechnik.de web: www.fischermesstechnik.de

Documentation representative: T. Malischewski Technical editor: R. Kleemann

All rights, also those to the translation, reserved. No part of this document may be reproduced or processed, duplicated or distributed using electronic systems or any other form (print, photocopy, microfilm or another process) without the written consent of the company FISCHER Mess- und Regeltechnik GmbH, Bad Salzuflen.

Reproduction for internal use is expressly allowed.

Brand names and procedures are used for information purposes only and do not take the respective patent situation into account. Great care was taken when compiling the texts and illustrations; Nevertheless, errors cannot be ruled out. The company FISCHER Mess- und Regeltechnik GmbH will not accept any legal responsibility or liability for this.

Subject to technical amendments.

Version history

Rev. ST4-A 11/18 Version 1 (first edition)

2 / 28 BA_EN_DE43

Page 3

FISCHER Mess- und Regeltechnik GmbH Table of contents

1 Safety instructions .........................................................................................................................................4

1.1 General .....................................................................................................................................................4

1.2 Personnel Qualification.............................................................................................................................4

1.3 Risks due to Non-Observance of Safety Instructions ...............................................................................4

1.4 Safety Instructions for the Operating Company and the Operator............................................................4

1.5 Unauthorised Modification ........................................................................................................................4

1.6 Inadmissible Modes of Operation .............................................................................................................4

1.7 Safe working practices for maintenance and installation work .................................................................5

1.8 Pictogram explanation ..............................................................................................................................5

2 Product and functional description ..............................................................................................................6

2.1 Delivery scope ..........................................................................................................................................6

2.2 Equipment versions ..................................................................................................................................6

2.3 Function diagram ......................................................................................................................................8

2.4 Design and mode of operation..................................................................................................................8

2.5 Intended use .............................................................................................................................................8

3 Assembly.........................................................................................................................................................9

3.1 General .....................................................................................................................................................9

3.2 Process connection ..................................................................................................................................9

3.3 Electrical connections .............................................................................................................................10

4 Start-up..........................................................................................................................................................13

4.1 Generalities.............................................................................................................................................13

4.2 Config select ...........................................................................................................................................13

4.3 Modbus functional description ................................................................................................................15

4.4 LED flash codes......................................................................................................................................21

5 Servicing .......................................................................................................................................................22

5.1 Maintenance ...........................................................................................................................................22

5.2 Transport ................................................................................................................................................22

5.3 Service....................................................................................................................................................22

5.4 Disposal ..................................................................................................................................................22

6 Technical data...............................................................................................................................................23

6.1 General ...................................................................................................................................................23

6.2 Input variables ........................................................................................................................................23

6.3 Communication parameter .....................................................................................................................23

6.4 Auxiliary energy ......................................................................................................................................24

6.5 Operating conditions...............................................................................................................................24

6.6 Construction design ................................................................................................................................24

7 Order codes ..................................................................................................................................................26

8 Attachments..................................................................................................................................................28

BA_EN_DE43 3 / 28

Page 4

1 | Safety instructions FISCHER Mess- und Regeltechnik GmbH

1 Safety instructions

1.1 General

This operating manual is an integral part of the product and therefore needs to be kept close to the instrument in a place that is accessible at all times to the responsible personnel.

The following sections, in particular instructions about the assembly, commissioning and maintenance, contain important information, non-observance of which could pose a threat to humans, animals, the environment and property.

The instrument described in these operating instructions is designed and manufactured in line with the state of the art and good engineering practice.

1.2 Personnel Qualification

The instrument may only be installed and commissioned by specialized personnel familiar with the installation, commissioning and operation of this product.

Specialized personnel are persons who can assess the work they have been assigned and recognize potential dangers by virtue of their specialized training, their skills and experience and their knowledge of the pertinent standards.

1.3 Risks due to Non-Observance of Safety Instructions

Non-observance of these safety instructions, the intended use of the device or the limit values given in the technical specifications can be hazardous or cause harm to persons, the environment or the plant itself.

The supplier of the equipment will not be liable for damage claims if this should happen.

1.4 Safety Instructions for the Operating Company and the Operator

The safety instructions governing correct operation of theinstrument must be observed. The operating company must make them available to the installation, maintenance, inspection and operating personnel.

Dangers arising from electrical components, energy discharged by the medium, escaping medium and incorrect installation of the device must be eliminated. See the information in the applicable national and international regulations.

Please observe the information about certification and approvals in the Technical Data section.

1.5 Unauthorised Modification

Modifications of or other technical alterations to the instrument by the customer are not permitted. This also applies to replacement parts. Only the manufacturer is authorised to make any modifications or changes.

1.6 Inadmissible Modes of Operation

The operational safety of this instrument can only be guaranteed if it is used as intended. The instrument model must be suitable for the medium used in the system. The limit values given in the technical data may not be exceeded.

The manufacturer is not liable for damage resulting from improper or incorrect use.

4 / 28 BA_EN_DE43

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FISCHER Mess- und Regeltechnik GmbH Safety instructions | 1

1.7 Safe working practices for maintenance and installation work

The safety instructions given in this operating manual, any nationally applicable regulations on accident prevention and any of the operating company's internal work, operating and safety guidelines must be observed.

The operating company is responsible for ensuring that all required maintenance, inspection and installation work is carried out by qualified specialized personnel.

1.8 Pictogram explanation

DANGER

Type and source of danger

This indicates a direct dangerous situation that could lead to death or serious injury (highest danger level).

a) Avoid danger by observing the valid safety regulations.

WARNING

Type and source of danger

This indicates a potentially dangerous situation that could lead to death or serious injury (medium danger level).

a) Avoid danger by observing the valid safety regulations.

CAUTION

Type and source of danger

This indicates a potentially dangerous situation that could lead to slight or serious injury, damage or environmental pollution (low danger level).

a) Avoid danger by observing the valid safety regulations.

NOTICE

Note / advice

This indicates useful information of advice for efficient and smooth operation.

BA_EN_DE43 5 / 28

Page 6

2 | Product and functional description FISCHER Mess- und Regeltechnik GmbH

Attachment boreholes for tapping screws Wall mounting plate

Item no.

Silicone-free

Measuring range Measuring range Ub Interface Prod. No..

Δ P1 Δ P2

DE435554P6M92MMW

0 ... 1600 Pa 0 ... 1000 Pa

24 V DC

RS 485

1808689.04.004

Silicone-free

Item no. Measuring range

Measuring range Ub Interface Prod. No.

DE435455P6L92MMW

0 ... 1000 Pa

0 ... 1600 Pa

24 V DC

RS 485

1808689.04.005

Δ P1

Δ P2

Standard version 90° rotated

Attention!Do not disconnect from the mains or open the case while energized.

Aluminium CK screw connection

for 6/4 or 8/6 mm hose

Pneumatic plug connection

for 6/4 or 8/6 mm hose

2 Product and functional description

2.1 Delivery scope

• DE43 digital 2-channel transmitter

• Operating Manual

2.2 Equipment versions

Assembly

Fig.1: Wall mounting

Fig.2: Type plate

Process connection

Fig.3: Process connection

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FISCHER Mess- und Regeltechnik GmbH Product and functional description | 2

M12 Plug 1 (male)

M12 Plug 2 (female)

2 1

3 4

1 2

4 3

2 Digital inputs (3,4) left 4 Digital inputs (1...4) 2 Digital inputs (1,2) right

M8 Bush (female)

Item no.

Silicone-free

Measuring range Measuring range

Ub Interface Prod. No..

Δ P1 Δ P2

DE435554P6M92MMW

0 ... 1600 Pa 0 ... 1000 Pa

24 V DC

RS 485

1808689.04.004

Silicone-free

Item no. Measuring range

Measuring range Ub Interface Prod. No.

DE435455P6L92MMW

0 ... 1000 Pa

0 ... 1600 Pa

24 V DC

RS 485

1808689.04.005

Δ P1

Δ P2

Horizontal

Vertical

Order code

Techn. Data

Serial number

Electrical connections

Fig.4: Electrical connections

2.2.1 Type plate

The presented type plates serve to show an example of the information shown. The data shown is purely fictive, but does correspond to the actual conditions. For more information, please see the order code at the end of these instructions.

Fig.5: Type plate

BA_EN_DE43 7 / 28

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2 | Product and functional description FISCHER Mess- und Regeltechnik GmbH

DIP

µC

BUS

POWER

Input 1

Input 2

Input 3

Input 4

1 Modbus IN

Modbus OUT

2.3 Function diagram

Fig.6: Function diagram

1 Sensor element 2 Micro-controller 3 AD converter 4 Digital inputs 5 Modbus interface 6 Power Supply 7 Modbus configuration

2.4 Design and mode of operation

The basis of the DE43 transmitter comprises two piezoresistive sensor elements.

The pressure that is to be measured acts upon a silicone membrane that is equipped with a resistor bridge. The acting pressure causes the membrane to move and therefore a change in resistance. The bridge signal is analysed by the integrated electronics and converted to a pressure value.

The DE43 transmitter communicates with an overriding control system via an RS 485 interface and a Modbus RTU protocol. The currently measured value is forwarded by the overriding control system on request.

The device also has a connecting slot for two or four proximity switches whose signals can also be queried through the Modbus by the overriding control system.

2.5 Intended use

The digital 2-channel transmitter DE43 is suitable for measuring pressure, under-pressure, and differential pressure in neutral gaseous media. The measured value is transferred to an overriding control system via an RS 485 interface with a Modbus RTU protocol.

Optionally, the device can monitor up to four external potential-free contacts, and send their switching status to the overriding control system.

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FISCHER Mess- und Regeltechnik GmbH Assembly | 3

CK Screw connection Pneumatic Plug connection

Channel 2Channel1

+ +

Channel 2Channel1

+ +

Differential pressure Pressure Under-pressure

higher pressure

lower pressure

Pressure

open

Under-pressure

3 Assembly

3.1 General

The device is designed for installation onto flat assembly plates. For screw connection to the assembly plate, the device features four assembly bores on its back, which can be used for Ø 3.5 mm tapping screws.

Optionally, the device can be delivered with a wall-mounting plate. This is also available as accessory.

At the factory, the device is calibrated for vertical installation, but the installation position is arbitrary.

The enclosure protection type IP 65 is only guaranteed, if a suitable power supply cable is used (see accessories).

If the device is intended for outdoor use, we recommend permanent protection against against constant rain or snow, however at the least a sufficiently dimensioned canopy.

3.2 Process connection

• By authorized and qualified specialized personnel only.

• The pipes need to be depressurized when the instrument is being connected.

• Appropriate steps must be taken to protect the device from pressure surges.

• Check that the device is suitable for the medium being measured.

• Maximum pressures must be observed (cf. Tech. data)

The pressure lines must be installed on a gradient so that no water pockets for gas measurements can be created. If the required gradient is not reached, water filters need to be installed at suitable points.

The pressure lines must be kept as short as possible and installed without any tight bends to avoid delays.

The process connections are marked with (+) and (-) symbols on the device. The pressure lines must be mounted according to these symbols.

Fig.7: Process connection

The process connections are suitable for hoses made of various materials (PA, PU, Teflon, etc.) with the following dimensions:

Process connection for Hose 8/6 Hose 6/4 Outer diameter 8 mm 6 mm Inner diameter 6 mm 4 mm

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3 | Assembly FISCHER Mess- und Regeltechnik GmbH

Plug 1

Plug 2

Access

Modbus configuration

2 1

3 4

1 2

4 3

3.3 Electrical connections

• By authorized and qualified specialized personnel only.

• When connecting the unit, the national and international electro-technical regulations must be observed.

• Disconnect the system from the mains, before electrically connecting the device.

• Do not connect the connector if strained.

Fig.8: Electrical connections

WARNING!Please note for the power supply to the devices that the M12 plugs are only suitable for max. 2A.

Fig.9: M12 connector 5-pin

Fig.10: M12 bush 5-pin

Plug 1 (Input)

Supply and bus connection

PIN Signal name Cable colour

A Coding

1 “Supply” dialogue +U

brown

2 BUS-D1 white 3 “Supply” dialogue -U

blue

4 BUS-D0 black 5 BUS-R grey

Plug 2 (Output)

Supply and bus connection

PIN Signal name Cable colour

A Coding

1 “Supply” dialogue +U

brown

2 BUS-D1 white 3 “Supply” dialogue -U

blue

4 BUS-D0 black 5 BUS-R grey

Digital inputs (E1 … E4)

Input for external potential-free contacts.

Fig.11: M8 bush

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PIN Signal name Cable colour

1 Supply contact 1 (+) +U 3 Supply contact 1 (-) -U

brown

blue

4 Input E1 black

The assignment of the M8 bushes is the same for all contacts, which is why only the assignment of digital input E1 is shown here as a example.

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FISCHER Mess- und Regeltechnik GmbH Assembly | 3

MASTER DE43

1 2

DE43

1 2

DE43

1 2

Address 1 Address 2 Address 127

Bus termination

Feed

1 2E

Modbus 5

MASTER

TAP

Slave

TAP

LT LT

Slave

TAP

DE43

1 2

Supply

1 2E

3.3.1 Modbus RTU network

The DE43 is usually connected in a line network structure as a so-called slave to the Modbus RTU network. Up to 123 bus participants can be operated without an amplifier on one strand

NOTICE!Star-shaped networks are not allowed.

Fig.12: Modbus RTU network

Communication is effected solely via a Modbus master that is also connected to the bus system. The connected slaves only react to direct commands from the master, which is why communication between the slaves is not possible.

To guarantee fault-free data transmission, we recommend terminating the end point of the Modbus RTU network with a 120Ω resistor. These bus terminating resistors are available as accessories.

It can be connected to an existing Modbus network via a conventional T-piece (passive TAP).

Fig.13: Modbus connection

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3 | Assembly FISCHER Mess- und Regeltechnik GmbH

BUS-D1 BUS-D0

BUS-R

BUS-D1 BUS-D0

BUS-R

Ub+ Ub-

1 3

2 4

DE43 SlaveMaster

DE43

1 2

Address 24

2. Feed

1 2E

DE43

1 2

Address 23

5 5

Modbus

∑

Ix< 2 A

x=1

Supply circuit

Fig.14: Supply

Please note that the M12 plugs are suitable for max. 2A. This value may already be exceeded if there are more than 23 bus participants (without digital inputs). For this reason, an intermediate feed should be provided at a suitable place.

Fig.15: Intermediate supply

Please note that a DE43 with digital inputs has a higher power draw. If the bus participants are equipped with digital inputs, the number of possible bus participants of a supply circuit are reduced.

The power draw of a device x with n digital inputs is calculated as follows: Ix = 55 mA + (n*4.5 mA)

This is calculated for the first bus participant and each of its successors. The results are accumulated in sequence until the result exceeds the limit value 2 A. The interim feed is then set after the bus participant k at which the total current of the supply circuit last lay below 2 A.

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FISCHER Mess- und Regeltechnik GmbH Start-up | 4

Sealing plug

Seal

DIP-switch

OFF

Switch position

S1 S2 S3 S4 S5 S6 S7 S8

Baudrate Parität

Stoppbit

X ON

4 Start-up

4.1 Generalities

A prerequisite for commissioning is correct installation of all electrical supply lines and the pressure lines. All connections are arranged so that there are no mechanical forces acting on the device.

Also, know-how of the Modbus RTU protocol and the bus architecture are required to commission the bus system.

4.2 Config select

The DE43 Transmitter can be configured using an 8-digit DIP switch. To this end, the sealing plug in the front plate needs to be removed. Below this is an 8pin DIP switch which can be used to configure both the Modbus address and also the interface.

Fig.16: Access to the DIP switch

After all settings have been made, close the front plate with the plug. Always use the original seal in this case. The sealing plug is screwed in tightly by hand.

4.2.1 Interfaces configuration

NOTICE!An X marks a random switch setting

Fig.17: DIP switches

The switch S8 is used to select between the interface configuration and Modbus address setting. For the interface configuration, ensure that the switch S8 is always in the setting ON.

BA_EN_DE43 13 / 28

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4 | Start-up FISCHER Mess- und Regeltechnik GmbH

S1 S2 S3 S4 S5 S6 S7 S8

Modbus Address OFF

Baud rate S1 S2 S3 S4 S5 S6 S7 S8

1200 OFF OFF OFF X ON 2400 ON OFF OFF X ON 4800 ON ON OFF X ON 9600 OFF ON OFF X ON 19200 ON OFF ON X ON 38400 OFF OFF ON X ON 57600 ON ON ON X ON

Parity S1 S2 S3 S4 S5 S6 S7 S8

None OFF OFF X X ON Identical parity ON OFF OFF X ON Not identical parity OFF ON OFF X ON

It is not possible to combine identical or non-identical parity with 2 stopbits.

Stopbits S1 S2 S3 S4 S5 S6 S7 S8

1 stopbit OFF X ON 2 stopbits ON X ON

The device needs to be restarted to confirm the settings. To do this, disconnect the device briefly from the power supply (plug 1).

4.2.2 Modbus address

To set the Modbus address, the switch S8 must be in the position OFF.

Fig.18: DIP switches

The address is entered in the dual system. The switches S1 to S7 represent the respective setting value as follows:.

S1 S2 S3 S4 S5 S6 S7

Binary 2

Decimal 1 2 4 8 16 32 64

For example:

The Modbus address 24 should be set.

S1 S2 S3 S4 S5 S6 S7 S8

Switch setting

Priority 0*2 Total 0 +0 +0 +8 +16 +0 +0 =24

OFF OFF OFF ON ON OFF OFF OFF

0*2

1*2

0*2

The device needs to be restarted to confirm the settings. To do this, disconnect the device briefly from the power supply (plug 1).

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FISCHER Mess- und Regeltechnik GmbH Start-up | 4

Master Slave

Init Request

Function Code Data Request

Instruction executed

Modbus response

Receive Response

Function Code Data Response

Master Slave

Init Request

Function Code Data Request

Error detected

Modbus response

Receive Response

Error CodeFunction Code (error)

Frame 1

3.5 char

4.5 char

Frame 2

3.5 char

Frame 3

Starting

≥3.5 char

Address

8 bit

Function

8 bit

Data

N x 8 bit

CRC Check

16 bits

End

≥3.5 char

Modbus message

4.3 Modbus functional description

The following describes the Modbus functions that support the DE43 Transmitter. The descriptions are initially kept general as explained in the Modbus Pro-

tocol Specification and are then supplemented with the unique features of the

DE43.

4.3.1 Modbus Transaction

A Modbus transaction comprises two parts. A request from the Master and a response from the Slave.

Fig.19: Error-free request/response cycle

If an error occurs during a Modbus transaction, the Function Code is replaced with a special Function Code with an error indicator in the Modbus Response message and a more detailed description of the error in the data field is sent.

Fig.20: Faulty request/response cycle

4.3.2 Modbus telegram

The maximum size of a Modbus telegram is 256Byte. The telegram comprises a 1 byte slave address, a 1 byte function code, the data and a 2byte CRC-checksum.

BA_EN_DE43 15 / 28

Fig.21: Modbus Message Frame

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4 | Start-up FISCHER Mess- und Regeltechnik GmbH

0x02 MSB LSB MSB LSB

51 2 3 4Byte

0x02 N Byte1 Byte N

1 2 3Byte

...

0x82 Code

1 2Byte

4.3.3 Function code 0x02: Read Discrete Inputs

This function code is used to read digital inputs.

Request

The query contains the address of the first bits that are to be read and their number.

Byte Field name Size Value range

1 Function Code 1 byte 0x02

2.3 Start Address 2 bytes 0x0000 to 0xFFFF

4.5 Number of inputs 2 bytes 1 to 2000 (0x7D0)

The DE43 can be equipped with up to four digital inputs.

Bit Data type Description State

0 Boolean Digital input 1 0 or 1 1 Boolean Digital input 2 0 or 1 2 Boolean Digital input 3 0 or 1 3 Boolean Digital input 4 0 or 1

Response

Error

The states of the digital inputs are summarised as bytes in the response. The number of bytes (N) is the result of the number of inputs divided by 8. If there is a rest, the number of bytes increases (N=N+1).

However, as the DE43 only has a maximum of 4 inputs, only 1 byte is transferred as a response.

The states of the digital inputs from the bit with the lowest value are saved within a byte. A bit value of 0 corresponds to the status OFF; a bit value of 1 corresponds to the status ON.

Byte Field name Size Value range

1 Function Code 1 byte 0x02 2 Number of bytes 1 byte N 3… Number of inputs N Bytes 8 Bit value

Byte Field name Size Value range

1 Function Code (error) 1 byte 0x82 2 Error code 1 byte

Code s. table Error codes [}21]

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FISCHER Mess- und Regeltechnik GmbH Start-up | 4

0x03 MSB LSB MSB LSB

51 2 3 4Byte

0x03 2N MSB

1 2 3Byte

...

LSB MSB LSB

4.3.4 Function code 0x03: Read Holding Registers

This Function Code is used to read the Holding Register. The maximum possible number of registers that can be addressed in one message is 125.

Request

The request contains the address of the first register that is to be read and the number of registers that need to be read. The addressing of the register starts with 0; the numbering of the registers starts with 1.

Byte Field name Size Value range

1 Function Code 1 byte 0x03

2.3 Start Address 2 bytes 0x0000 to 0xFFFF

4.5 Number of registers 2 bytes 0x0001 to 0x007D (1…125)

The DE43 Transmitter has precisely 1 Holding Register with the address 0x0000.

Bit Data type Description State

0 Unsigned Integer Pressure sensor1Sensor error 0 or 1

Response

1 Unsigned Integer Pressure sensor1Pressure too low 0 or 1

2 Unsigned Integer Pressure sensor1Pressure too high 0 or 1

3 Unsigned Integer RESERVED 0 or 1 4 Unsigned Integer Pressure sensor2Sensor error 0 or 1

5 Unsigned Integer Pressure sensor2Pressure too low 0 or 1

6 Unsigned Integer Pressure sensor2Pressure too high 0 or 1

7 Unsigned Integer RESERVED 0 or 1 8 Unsigned Integer Temp. sensor Sensor error 0 or 1 9 Unsigned Integer Temp. sensor Temperature too low 0 or 1 10 Unsigned Integer Temp. sensor Temperature too high 0 or 1 11 Unsigned Integer RESERVED 0 or 1 12 Unsigned Integer General System error 0 or 1 13 Unsigned Integer RESERVED 0 or 1 14 Unsigned Integer RESERVED 0 or 1 15 Unsigned Integer RESERVED 0 or 1

The response contains two bytes for each read register; therefore the number of bytes is twice of the number of registers (N).

Byte Field name Size Value range

1 Function Code 1 byte 0x03 2 Number of bytes 2 bytes 2N

3.4 Holding Register N x 2 Byte 16 Bit value

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4 | Start-up FISCHER Mess- und Regeltechnik GmbH

0x83 Code

1 2Byte

0x04 MSB LSB MSB LSB

51 2 3 4Byte

0x04 2N MSB

1 2 3Byte

...

LSB MSB LSB

0x84 Code

1 2Byte

Error

Byte Field name Size Value range

1 Function Code (error) 1 byte 0x83 2 Error code 1 byte

Code s. table Error codes [}21]

4.3.5 Function code 0x04: Read Input Register

This Function Code is used to read the input register. The maximum possible number of registers that can be addressed in one message is 125.

Request

Byte Field name Size Value range

1 Function Code 1 byte 0x04

2.3 Start Address 2 bytes 0x0000 to 0xFFFF

4.5 Number of registers 2 bytes 0x0001 to 0x007D (1…125)

Response

Error

The DE43 Transmitter has 3 Input Registers.

Reg.No. Address Data type Description Unit Contents

1 0x0000 Integer Measured value channel1PA Measured

value

2 0x0001 Integer Measured value channel2PA Measured

value

3 0x0002 Integer Temperature measured

value

°C Measured

value

The response contains two bytes for each read register; therefore the number of bytes is twice of the number of registers.

Byte Field name Size Value range

1 Function Code 1 byte 0x04 2 Number of bytes 2 bytes 2N

3.4 Content Register N x 2 Byte 16 Bit value

Byte Size Value range

1 Function Code (error) 1 byte 0x84 2 Error code 1 byte

18 / 28 BA_EN_DE43

Code s. table Error codes [}21]

Page 19

FISCHER Mess- und Regeltechnik GmbH Start-up | 4

0x2B 0x0E DevID ObjID

1 2 3 4Byte

4.3.6 Function code 0x2B/0x0E: Device Identification

This Function Code is used to read certain information about identification of the unit. The following object types are used in the FISCHER units:

Object ID Object Name Type Category

0x00 VendorName ASCII String Basic 0x01 ProductCode ASCII String Basic 0x02 MajorMinorRevision ASCII String Basic 0x03 VendorUrl ASCII String Regular 0x04 ProductName ASCII String Regular 0x05 ModelName ASCII String Regular 0x06 UserApplicationName ASCII String Regular

NOTICE!There are no objects of the Extended category.

Request

Byte Field name Size Value range

1 Function Code 1 byte 0x2B 2 MEI Type 3 Read Device ID Code 1 byte 01 / 02 / 04 4 Object ID 1 byte 0x00 to 0xFF

MEI = Modbus Encapsulated Interface

1 byte 0x0E

Read Device ID

The Read Device ID Code (DevID) serves to specify the access. If the code is not correct, an error message with the code 0x03 is sent.

01 Access to objects of the Basic category stream access 02 Access to objects of the Regular category stream access 04 Access to a single object individual access

If the length of the requested information exceeds the maximum possible length of the PDU, several transactions (Request/Response) must be carried out.

Object ID

The Object ID Code states on which object of the 'stream access‘ should start. If the Object ID does not match the existing objects, the 'stream access‘ starts with the first object of the category. In the event of an 'individual access‘, an error message is generated with the error code 0x02.

BA_EN_DE43 19 / 28

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4 | Start-up FISCHER Mess- und Regeltechnik GmbH

0x2B 0x0E DevID

1 2 3 4Byte

Conf5Follow

Num ObjID Len Val

ObjID Len Val

Object NObject 0

...

List

Val

... ...

...

1 k

...

Response

The response comprises several bytes with status information followed by a list with the requested object information.

Byte Field name Size Value range

1 Function Code 1 byte 0x2B 2 MEI Type 1 byte 0x0E 3 Read Device ID Code 1 byte 01 / 02 / 03 / 04 4 Conformity Level 1 byte 0x83 5 More Follows 1 byte 0x00 / 0xFF 6 Next Object ID 1 byte Object ID Number 7 Number of Objects 1 byte

List of object data

Object(N).ID 1 byte Object(N).Length 1 byte Object(N).Value k Byte

Conformity Level

The Conformity Level specifies the information category and the access type that is supported.

0x83 Extended Identification stream and individual access

More Follows

If the length of the requested information exceeds the maximum possible length of the PDU, several transactions (Request/Response) must be carried out. The 'More Follows‘ byte signalises whether or not further requests are required to transfer all information.

0x00 no further objects 0xFF other objects available other transaction necessary

Next Object ID

If a further transaction is required (More Follows = FF), the Object ID for the following Request is stated at this point.

Otherwise (More Follows = 00) this value is useless and is set to 00.

Number of Objects

This byte states the number N of the objects that are transferred in the response. In the case of 'individual access‘ the number of objects is = 01.

List of object data

Object(0).ID Object ID of the first object in the response Object(0).Length Length of the object Object(0).Value Value of the object … Object(N).ID Object ID of the last object in the response Object(N).Length Length of the object Object(N).Value Value of the object

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FISCHER Mess- und Regeltechnik GmbH Start-up | 4

0xAB Code

1 2Byte

Error

Byte Field name Size Value range

1 Function Code (error) 1 byte 0xAB (0x2B + 0x80) 2 Error code 1 byte

Code s. table Error codes [}21]

4.3.7 Error codes

0x01 The function is not supported 0x02 An invalid address is referenced 0x03 The request does not correspond to the expected format 0x04 Am error that could not be remedied occurred

4.4 LED flash codes

The operational status of the device is continuously signalised via two LEDs. The green LED signalises correct operation and will go off in the event of an error. The error type is communicated via flash codes of the red LED.

ON The LED shines permanently Flash The LED flashes regularly for 0.2 s short The LED shines for approx. 0.5 s long The LED shines for approx. 1 s OFF The LED does not shine

green LED Red LED Description

ON OFF The DE43 is ready for operation ON Flash The DE43 sends an answer to the master via the

Modbus

OFF 1 x long

1 x short

OFF 1 x long

2 x short

OFF 1 x long

3 x short

OFF 1 x long

Pressure sensor 1: Error reading the sensor signal

Pressure sensor 2: Error reading the sensor signal

Temperature sensor: Error reading the sensor signal

Error reading the configuration parameter

10 x short

OFF 1 x long

Error writing the configuration parameter

11 x short

OFF 1 x long

12 x short

Wrong configuration of the MODBUS parameter (Baud rate, parity, stopbits)

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Page 22

5 | Servicing FISCHER Mess- und Regeltechnik GmbH

5 Servicing

5.1 Maintenance

The instrument is maintenance-free. We recommend the following regular inspection to guarantee reliable operation and a long service life:

• Check the function in combination with downstream components.

• Check the leak-tightness of the pressure connection lines.

• Check the electrical connections.

The exact test cycles need to be adapted to the operating and environmental conditions. In combination with other devices, the operating instructions for the other devices also need to be observed.

5.2 Transport

The measuring device must be protected against impacts. It should be transported in the original packaging or a suitable transport container.

5.3 Service

All defective or faulty devices should be sent directly to our repair department. Please coordinate all shipments with our sales department.

WARNING

Process media residues

Process media residues in and ondismantled devices can be a hazard to people, animals and the environment. Take adequate preventive measures. If required, the devices must be cleaned thoroughly.

Return the device in the original packaging or a suitable transport container.

5.4 Disposal

Please help to protect the environment by always disposing of the work pieces and packaging materials in compliance with the valid national waste and recycling guidelines or reuse them.

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FISCHER Mess- und Regeltechnik GmbH Technical data | 6

6 Technical data

6.1 General

General information

Type designation DE43 Pressure type Differential pressure, relative pressure Measurement principle Piezo-resistive

Reference conditions (acc. to IEC 61298-1)

Temperature +15 … +25 °C Relative humidity 45 … 75 % Air pressure 86 … 106 kPa 860 … 1060 mbar Installation position User-defined

6.2 Input variables

Measuring variable Pressure, under-pressure and differential pres-

sure for neutral gaseous media

Damping (P=10…90%) 1 sec

Unit + ranges (0 … +p) + ranges (-p … +p)

Measuring range (p) PA 400 600 1000 1600 2500 ±250 ±400 ±600 ±1000 ±1600

kPa 0.4 0.6 1 1.6 2.5 ±0.25 ±0.4 ±0.6 ±1 ±1.6

mbar 4 6 10 16 25 ±2.5 ±4 ±6 ±10 ±16 Max. stat. operating pressure mbar 50 50 100 100 100 50 50 50 100 100 Bursting pressure mbar 150 150 300 300 300 150 150 150 300 300 Characteristic curve

deviation

TK Span

(*)

**)

Max. %FS 1.0 Type %FS 0.5 Max. %FS/10K 1.0 1.0 0.3 0.3 0.3 1.0 0.5 0.3 0.3 0.3 Type %FS/10K 0.3

TK zero-point

**)

Max. %FS/10K 1.0 1.0 0.4 0.4 0.4 1.0 0.5 0.4 0.4 0.4 Type %FS/10K 0.2

Characteristic curve deviation (non-linearity and hysteresis) at 25°C

**)

Compensation range 0…60 °C

6.3 Communication parameter

interface RS 485 Report Modbus RTU Modbus specification Application Protocol Specification

V1.1b3 (April 26, 2012) Address 1 … 127 Baud rate 1200 … 57600 Baud Parity Even, uneven, parity Stopbits 1…2

BA_EN_DE43 23 / 28

Page 24

6 | Technical data FISCHER Mess- und Regeltechnik GmbH

Pre-set data format

Baud rate 9600 Baud Parity None Stopbit 1

Supported Modbus functions

0x02 Read Discrete Inputs 0x03 Read Holding Registers 0x04 Read Input Registers 0x2B / 0x0E Read Device Identification

For more information about this, please refer to the operating instructions and online http://www.modbus.org/docs/Modbus_Application_Protocol_V1_1b3.pdf.

6.4 Auxiliary energy

nominal voltage 24 V DC Admissible operating voltage 18 … 30 V DC Absorbed power Max. 2 W

6.5 Operating conditions

Ambient temperature range -10 … +70 °C Storage temperature range -20 … +70 °C Medium temperature range -10 … +70 °C Protection IP65 EMC EN 61326-1:2013

RoHS EN50581:2012

6.6 Construction design

Installation position User-defined Max. dimensions (WxHxT) 116 x 103 x 76 mm Weight 375 g

6.6.1 Connections

Modbus connector 1 M12 round plug connector

Modbus connector 2 M12 round plug connector

Digital inputs E1 … E4 M8 round plug connector (3-pin, female)

Process connection option 1 Aluminium CK screw connection for 6/4 or 8/6

Process connection option 2 Pneumatic plug connector for 6/4 or 8/6 mm

EN 61326-2-3:2013

(5-pin, male, max. 2A)

Plug 1 for supply and bus signals

(5-pin, female, max. 2A)

Plug 2 for forwarding the signals to the next BUS participant or to connect a BUS termination plug

Depending on the model, 0, 2 or 4 proximity switches can be connected

mm hose

hose

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Page 25

FISCHER Mess- und Regeltechnik GmbH Technical data | 6

18,5

70.5

61.5

90 76

758394

M12 Plug 1

M12 Plug 2

CK Screw connection

Pneumatic plug connection

27,5

Digital inputs E1 ... E4

116

2 inputs left 2 inputs right without inputs4 inputs

6.6.2 Materials

Housing Polyamide PA 6.6 Media-contacting material Silicon, PVC, aluminium, brass

6.6.3 Dimensional drawings

BA_EN_DE43 25 / 28

Fig.22: Dimensional picture

Page 26

7 | Order codes FISCHER Mess- und Regeltechnik GmbH

Process connection

Digital inputs

Operating voltage

Interface

Interface protocol

Electronic connection

Assembly

Type

Measuring range Channel 1

Code no.

D E 4 3 9 2 M M

1 2 5 6 7 8 9 10 11 123 4

Measuring range Channel 2

7 Order codes

Measuring range channel 1:

[1.2] [Pa]

D7 0 … 400 D8 0 … 600 D9 0 … 1000 E1 0 … 1600 E2 0 … 2500 Pa S6 -250 … +250 R1 -400 … +400 R2 -600 … +600 R3 -1000 … +1000 R4 -1600 … +1600

Measuring range channel 2:

[1.2] [Pa]

D7 0 … 400 D8 0 … 600 D9 0 … 1000 E1 0 … 1600 E2 0 … 2500 Pa S6 -250 … +250 R1 -400 … +400 R2 -600 … +600 R3 -1000 … +1000 R4 -1600 … +1600

Process connection:

[5.6]

40 CK aluminium screw connection for 6/4 mm hose

41 CK aluminium screw connection for 8/6 mm hose P6 Pneumatic plug connector MS nickel-plated for 6/4 mm hose P8 Pneumatic plug connector MS nickel-plated for 8/4 mm hose

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FISCHER Mess- und Regeltechnik GmbH Order codes | 7

Digital inputs:

[7] M8 round plug connector 3-pin, female

0 Without digital inputs

L Two digital inputs (E3, E4) left K Two digital inputs (E1, E2) right C Four digital inputs (E1, E2) right and (E3, E4) left

Operating voltage:

[8]

9 24 V DC

Interface:

[9]

2 RS 485

Interface protocol:

[10] (Code no.)

C Modbus RTU Protocol

Electrical connection:

[11]

C M12 round plug connector (Modbus, power supply)

M8 round plug connector (Digital inputs, optional→[7])

Assembly:

[12]

0 Standard (attachment boreholes on rear side) W Horizontal wall mounting

V Vertical wall mounting

BA_EN_DE43 27 / 28

Page 28

8 | Attachments FISCHER Mess- und Regeltechnik GmbH

8 Attachments

Fig.23: CE_DE_DE43

28 / 28 BA_EN_DE43

FISCHER DE43 Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Impressum

Version history

Table of contents

1 Safety instructions

1.1 General

1.2 Personnel Qualification

1.3 Risks due to Non-Observance of Safety Instructions

1.4 Safety Instructions for the Operating Company and the Operator

1.5 Unauthorised Modification

1.6 Inadmissible Modes of Operation

1.7 Safe working practices for maintenance and installation work

1.8 Pictogram explanation

2 Product and functional description

2.1 Delivery scope

2.2 Equipment versions

2.2.1 Type plate

2.3 Function diagram

2.4 Design and mode of operation

2.5 Intended use

3 Assembly

3.1 General

3.2 Process connection

3.3 Electrical connections

3.3.1 Modbus RTU network

4 Start-up

4.1 Generalities

4.2 Config select

4.2.1 Interfaces configuration

4.2.2 Modbus address

4.3 Modbus functional description

4.3.1 Modbus Transaction

4.3.2 Modbus telegram

4.3.3 Function code 0x02: Read Discrete Inputs

4.3.4 Function code 0x03: Read Holding Registers

4.3.5 Function code 0x04: Read Input Register

4.3.6 Function code 0x2B/0x0E: Device Identification

4.3.7 Error codes

4.4 LED flash codes

5 Servicing

5.1 Maintenance

5.2 Transport

5.3 Service

5.4 Disposal

6 Technical data

6.1 General

6.2 Input variables

6.3 Communication parameter

6.4 Auxiliary energy

6.5 Operating conditions

6.6 Construction design

6.6.1 Connections

6.6.2 Materials

6.6.3 Dimensional drawings

7 Order codes

8 Attachments