Rotronic CRP5 User Manual

D-M-CRP5-MODBUS-V1_03

Rotronic AG
Bassersdorf, Switzerland

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Modbus Manual Version 1.03

Modbus Manual for Clean Room Panel CRP5

This manual is for persons who will use the Clean Room Panel Modbus protocol. It describes how
messages are constructed and how transactions take place using Modbus protocol.

D-M-CRP5-MODBUS-V1_03

Rotronic AG
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Table of contents

1 Modbus protocol ............................................................................................................................... 3

1.1 Structure of the Modbus protocol ....................................................................................................... 3

1.1.1 Modbus RTU / TCP ................................................................................................................... 3

1.2 Modbus Data Format ......................................................................................................................... 4

1.2.1 16-bit Integer Value ................................................................................................................... 4

1.2.2 32-bit Float corresponding to IEEE 754 .................................................................................... 4

1.2.3 32-bit Integer Value ................................................................................................................... 4

1.2.4 Selectable Swap Modes for Rotronic Devices........................................................................... 5

2 CRP5 Modbus Fields and Mapping .................................................................................................. 6

2.1 CRP5 Modbus Fields ......................................................................................................................... 6

2.2 Device Specific Coils ......................................................................................................................... 6

2.2.1 Relays 1 to 6 ............................................................................................................................. 6

2.2.2 Valves A to D ............................................................................................................................ 7

2.2.3 Maintenance/Calibration ........................................................................................................... 7

2.2.4 Sensor Actions .......................................................................................................................... 9

2.2.5 Device Actions .........................................................................................................................10

2.2.6 Example: Read Single Coil.......................................................................................................11

2.2.7 Example: Write Single Coil .......................................................................................................12

2.2.8 Example: Write Multiple Coils ...................................................................................................12

2.2.9 Example: Reset Device ............................................................................................................13

2.3 Device Specific Discrete Inputs (read only) ......................................................................................14

2.3.1 Digital Inputs 1 and 2 ...............................................................................................................14

2.3.2 Example: Read Discrete Inputs ................................................................................................14

2.4 Device Specific Input Registers (read only) ......................................................................................15

2.4.1 Device Data..............................................................................................................................15

2.4.2 Current Values: Float Values ...................................................................................................16

2.4.3 Current Values: Integer Values ................................................................................................17

2.4.4 FDA Data .................................................................................................................................18

2.4.5 Example: Read Input Register .................................................................................................19

2.5 Data only for internal use ............................................................. Fehler! Textmarke nicht definiert.

2.5.1 Internal Data (for Rotronic-internal use only)....................... Fehler! Textmarke nicht definiert.

2.5.2 DAC Data Settings (for Rotronic-internal use only) ............. Fehler! Textmarke nicht definiert.

2.6 Device Specific Holding Registers ....................................................................................................19

2.6.1 Value Type ...............................................................................................................................19

2.6.2 Value Unit.................................................................................................................................21

2.6.3 Integer Value Scaling ...............................................................................................................22

2.6.4 Reference Value Settings ........................................................................................................22

2.6.5 Device Settings ........................................................................................................................22

2.6.6 Device Descriptions .................................................................................................................24

2.6.7 Fix Value Settings ....................................................................................................................26

2.6.8 Analog Output Settings ............................................................................................................27

2.6.9 Display Settings .......................................................................................................................29

2.6.10 Alarm Settings .....................................................................................................................30

2.6.11 Relay Settings ......................................................................................................................32

2.6.12 Analog Input Settings ...........................................................................................................34

2.6.13 Ethernet Settings .................................................................................................................36

2.6.14 Example: Read Holding Register .........................................................................................37

2.6.15 Example: Write Holding Register .........................................................................................38

3 Document Releases ........................................................................................................................ 39

D-M-CRP5-MODBUS-V1_03

Rotronic AG
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1 Modbus protocol

The Clean Room Panel (CRP5) can handle Modbus RTU (asynchronous communication over RS485) and
Modbus TCP (client-server communication over Ethernet). Modbus ASCII is not supported.

For detailed information about Modbus protocol see:
(http://modbus.org/docs/Modbus_Application_Protocol_V1_1b3.pdf).

Attention!

Changes to register content (especially Holding Registers) in the CRP5 can change the functionality of
the CRP5. This may cause the CRP5 to become inoperable.

Changes of register contents should only be made with the necessary knowledge of the Modbus protocol.

1.1 Structure of the Modbus protocol

1.1.1 Modbus RTU / TCP

1.1.1.1 Modbus RTU

Modbus RTU is an asynchronous communication protocol. The CRP5 handles Modbus RTU over the
included RS485 interface. The communication parameters are 19200 Baud, 8-bit data, no parity and cannot
be changed.

Note!
Modbus RTU Address of the CRP5 is always the CRP5 RS485 Network Address + 1!

1.1.1.2 Modbus TCP

Modbus TCP is a client-server communication protocol over Ethernet. The CRP5 handles Modbus TCP over
the port 502 and cannot be changed.

Modbus TCP needs a Modbus Application Protocol Header (MBAP 7 Bytes) in front of the Protocol Data
Unit (PDU).
Modbus commands are integrated in PDU. Every Modbus command has his own PDU.

1.1.1.3 Difference between Modbus RTU and TCP

A Modbus RTU message looks like:

Modbus RTU Message

Slave ID

Command

Data

CRC

PDU

A Modbus TCP message includes a MBAP-Header and looks like:

Modbus TCP Message

Transaction ID

Protocol ID

Length

Unit ID

Command

Data

MBAP-Header

PDU

For detailed information look at (http://modbus.org/docs/Modbus_Application_Protocol_V1_1b3.pdf).

D-M-CRP5-MODBUS-V1_03

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1.2 Modbus Data Format

The Modbus protocol only specifies the 16-bit integer data type and is declared as “Big-Endian” protocol.

1.2.1 16-bit Integer Value

16-bit Integer for Modbus Devices

Modbus Field N

MSB

LSB

12

34

Byte x

Byte x+1

For other data types, as 32-bit floating point, there is no specification how they should be mapped to the
Modbus address range. It is up to the device manufacturer to specify this format.

1.2.2 32-bit Float corresponding to IEEE 754

MSB

LSB

SEEEEEEE

EMMMMMMM

MMMMMMMM

MMMMMMMM

S – Sign
E – Exponent
M - 23 bit Mantissa

32-bit Float for Rotronic Modbus Devices

The 32-Bit Float value is represented by two 16-bit registers. The 4 Bytes have to be mapped to the Modbus
address range as shown below

Modbus Field N

Modbus Field N+1

LSB

MSB

MMMMMMMM

MMMMMMMM

SEEEEEEE

EMMMMMMM

Byte x

Byte x+1

Byte x+2

Byte x+3

1.2.3 32-bit Integer Value

Example: Integer Value 0x12345678

MSB

LSB

12

34

56

78

32-bit Integer for Rotronic Modbus Devices

The 32-Bit Integer value represents two 16-bit registers. The 4 bytes of the 32-bit Integer value have to be
mapped to the Modbus address range as shown below.

Modbus Field N

Modbus Field N+1

LSB

MSB 56

78

12

34

Byte x

Byte x+1

Byte x+2

Byte x+3

Because there is no standard and it is mostly a matter of personal preference, it is configurable how the four
bytes are being mapped to the two registers.

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1.2.4 Selectable Swap Modes for Rotronic Devices

Selectable swap modes (see Device Settings -> Modbus Operation Mode) only for 32-bit Float and 32-bit
Integer values based on Little Endian memory organisation.

Swap Mode

Source Bytes a,b,c,d

Target Bytes a,b,c,d

No change

[ a b ] [ c d ]

[ a b c d ]

byte and word swap

[ a b ] [ c d ]

[ d c b a ]

byte swap

[ a b ] [ c d ]

[ b a d c ]

word swap (Rotronic Default)

[ a b ] [ c d ]

[ c d a b ]

D-M-CRP5-MODBUS-V1_03

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2 CRP5 Modbus Fields and Mapping

2.1 CRP5 Modbus Fields

Primary Tables

Type

Read / Write

Coils / Registers

Function Code

Coils

Bit

Read/Write

1 … 9’999

0x01

Read Coils

0x05

Write Single Coil

0x0F

Write Multiple Coils

Discrete Inputs

Bit

Read Only

10’001 … 29’999

0x02

Read Discrete Inputs

Input Registers

16-bit

Read Only

30’001 … 39’999

0x04

Read Input Register

Holding Registers

16-bit

Read/Write

40’001 … 49’999

0x03

Read Holding Registers

0x06

Write Single Register

0x10

Write Multiple Registers

Attention!

Coils and registers in Modbus are addressed starting at zero. Therefore coils numbered 1…16 are

addressed as 0…15 or registers numbered e.g. 10'001…10'016 are addressed as 10'000…10'015!

Note!
The content of not specified coils/registers are undefined!

2.2 Device Specific Coils

With Modbus Coils you can get the state of one or more coils or activate/deactivate one or more coils.
Assisted Modbus commands are Read Coils (0x01), Write Single Coil (0x05) and, for the CRP5, in some

cases Write Multiple Coils (0x0F).

2.2.1 Relays 1 to 6

Commands to energize/de-energize the relays of the CRP5 manually.

Attention!

If in Relay Settings the flag Relay x Alarm OFF is set, it is not possible to energize the relay x manually.
The relay will be de-energized every measuring cycle, when alarm is off!

Coil

Name

Type

Description

1

Relay 1

*!

 Get state of relay 1
 Switch relay 1 ON/OFF

2

Relay 2

*!

 Get state of relay 2
 Switch relay 2 ON/OFF

3

Relay 3

*!

 Get state of relay 3
 Switch relay 1 ON/OFF

4

Relay 4

*!

 Get state of relay 4
 Switch relay 4 ON/OFF

5

Relay 5

*!

 Get state of relay 5
 Switch relay 5 ON/OFF

6

Relay 6

*!

 Get state of relay 6
 Switch relay 6 ON/OFF

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7

Reserved

 Undefined

8

Reserved

 Undefined

*

It is possible to one or more relays with the Modbus command 0x0F

!

An energized relay stays energized until the related coil is de-energized, an Alarm Off after… event
(see Relay Settings) or a device reset occurs

2.2.2 Valves A to D

Commands to energize/de-energize the valves of the CRP5 manually.

Coil

Name

Type

Description

9

Valve A (Zero+)

*

 Get state of valve A
 Switch valve A ON/OFF

10

Valve B (Zero-)

*

 Get state of valve B
 Switch valve B ON/OFF

11

Valve C (Front+)

*

 Get state of valve C
 Switch valve C ON/OFF

12

Valve D (Front-)

*

 Get state of Valve D
 Switch Valve D ON/OFF

13

Reserved

 Undefined

14

Reserved

 Undefined

15

Reserved

 Undefined

16

Reserved

 Undefined

*

It is possible to set one or more valves with the Modbus command 0x0F

!

An energized valve stays energized until the related coil is de-energized or a device reset occurs

2.2.3 Maintenance/Calibration

The External Maintenance mode will have activated in case of maintenance services: clean room cleaning
and during calibration process.
Modbus command Write Multiple Coils (0x0F) is not possible.

Coil

Name

Type

Description

17

External Maintenance

 Get state of external maintenance
 Switch external maintenance ON/OFF

18

Calibration Back Access

!

 Get state of calibration back access
 Switch calibration back access ON/OFF

19

Calibration Front Access

!

 Get state of calibration front access
 Switch calibration front access ON/OFF

20

Reserved

 Undefined

21

Reserved

 Undefined

22

Reserved

 Undefined

23

Reserved

 Undefined

24

Reserved

 Undefined

!

Only one of these calibration accesses (back or front) can be active at the same time

External Maintenance: By starting this action, maintenance services are possible, e.g. clean room cleaning
or calibration processes.

Calibration Back/Front Access: Calibration can either occur on the front or back inputs of the differential
pressure sensor – never set both calibration access points, front and back the same time.
There are 3 possibilities to access the differential pressure sensor of the CRP5 (see below).

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Front or Back Access
Fixed Front + Access

Fixed Front - Access

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2.2.4 Sensor Actions

Direct sensor actions!

Attention!

Be careful to use these commands, due to any possible miss adjustments.

Modbus command Write Multiple Coils (0x0F) is not possible.

Coils

Name

Type

Description

25

Differential Pressure Zero
Adjust

*

 Zero adjust of the differential pressure sensor
 These action takes about 15 seconds to execute

26

Differential Pressure Gain
Adjust

*!

 Setting the gain of the differential pressure sensor
 These action takes about 2 seconds to execute

27

Differential Pressure Reset
Adjustment

*

 Resets differential pressure gain and offset settings to

1.0 (gain) and 0.0 (offset)

28

Acquire Humidity Data

*!

 Acquires a reference value for the humidity
 It’s possible to acquire more than one different

reference values

29

Delete Acquired Humidity Data

*

 Deletes all acquired humidity reference values

30

Adjust Acquired Humidity Data

*

 The acquired humidity data will be sent to the

humidity sensor

Attention! If no reference values has acquired, humidity adjust is not possible!

31

Adjust Temperature Data

*!

 The reference temperature data will be sent to the

temperature sensor

32

Reserved

 Undefined

*

During these action, communication with the device is not possible

!

Before activating these action, a reference value has to be set for the desired sensor (see Reference

Value Settings)

Note!
For adjustment procedures, you need a stable environment no matter what sensor will have adjusted.

Differential Pressure Gain Adjust: By starting this action, the differential pressure sensor will be adjusted
to a reference value that is applied to the chosen pressure inputs (front or back). This reference value must
be entered in the appropriate reference register (see Reference Value Settings -> Differential Pressure)
before the adjustment procedure is started. Beside the zero adjust point, only one further differential
pressure value can be acquired as a reference value.

Differential Pressure Reset Adjustment: The adjustment parameters determined during the production of
the CRP5 will be restored.

Acquire Humidity Data: By starting this action, the CRP5-probe will be adjusted to a reference humidity
value. This reference humidity in the unit of the applied reference must be entered in the appropriate
reference register (see Reference Value Settings -> Humidity) before the acquiring procedure is started. Up
to 99 humidity values can be acquired as reference values.

Delete Acquired Humidity Data: By starting this action, all acquired data will get lost.
Adjust Acquired Humidity Data: By starting this action, the CRP5-probe will be adjusted to the acquired

reference values. If no reference values has been acquired, a humidity adjustment is not possible.

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Adjust Temperature Data: By starting this action, the CRP5-probe will be adjusted to a reference
temperature value. This reference temperature in the unit of the applied reference must be entered in the
appropriate reference register (see Reference Value SettingsReference Value Settings -> Temperature)
before the adjust procedure is started. Only one temperature value can be acquired as a reference value.

2.2.5 Device Actions

Direct device actions!

Attention!

Be careful to use these commands, due to any possible wrong configurations.

Modbus command Write Multiple Coils (0x0F) is not possible.

Coils

Name

Type

Description

33

Reset Device

*

 Reset device

34

Store Device Settings

*

 Stores the actual settings of the device into FLASH

35

Restore All Device Settings

*

 Restores the device (factory) settings in FLASH to the

device

36

Restore Device Settings
without Ethernet Data

*

 Restores the device (factory) settings in FLASH to the

device, without the Ethernet settings

37 … 64

Reserved

 Undefined

65 …

9’999

Reserved

 Undefined
 Gives back Modbus Exception Code 02

*

During these action, communication with the device is not possible

Reset Device: The device will be restarted.
Store Device Settings: All device-relevant data will be stored in the FLASH. Be careful, executing this

command, will overwrite older (factory) settings in the FLASH.
Restore All Device Settings: All device-relevant data will be restored from the FLASH to the device. Be

careful, all individual device settings by customer will be overwritten by the factory settings.
Restore All Device Settings without Ethernet Data: All device-relevant data, except Ethernet settings, will

have restored from the FLASH to the device. Be careful, all device settings will have overwritten, except the
Ethernet settings.

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2.2.6 Example: Read Single Coil

2.2.6.1 Red Relay 1 to 6

Initial situation: The relays 1, 3 and 5 are set.
RTU Example:

Transmit

01 01 00 00 00 07 7d c8

Receive

01 01 01 15 90 47

TCP Example:

Transmit

MBAP 01 01 00 00 00 07

Receive

MBAP 01 01 01 15

Field

Bytes

Value

Description

MBAP

7

MBAP

MBAP header (see Modbus RTU / TCP)

Checksum

2

CRC

CRC Checksum (see Modbus RTU / TCP)

RTU number

1

0x01

Modbus RTU Address (RS485 Address + 1)
(see Device Descriptions)

Function code

1

0x01

Read Single Coil

Starting address

2

0x0000

= 0, means address of the 1. coil
( Attention! coil number – 1 )

Quantity of coils

2

0x0007

= 7, 1 to 7 gives the same result 1 byte (8 coils)
8 to 15 will give back 2 bytes (16 coils) etc.
(maximal value for CRP5 0x003f = 63 ≙ 8 bytes)

Byte count

1

0x01

= 1 ≙ N, means quantity of coils / 8, if the remainder
is different of 0 => N = N+1

Coil status

(see Relays)

n

0x15

n = N or N+1 = 8 bits

Bit

State

State of Relais 1 to 6

0

ON

Coil 1 = Relais 1 (ON = 1, OFF = 0)

1

OFF

Coil 2 = Relais 2 (ON = 1, OFF = 0)

2

ON

Coil 3 = Relais 3 (ON = 1, OFF = 0)

3

OFF

Coil 4 = Relais 4 (ON = 1, OFF = 0)

4

ON

Coil 5 = Relais 5 (ON = 1, OFF = 0)

5

OFF

Coil 6 = Relais 6 (ON = 1, OFF = 0)

6

OFF

Not used

7

OFF

Not use

For detailed information about Modbus protocol Read Single Coil see:
(http://modbus.org/docs/Modbus_Application_Protocol_V1_1b3.pdf).

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2.2.7 Example: Write Single Coil

2.2.7.1 Set State of Relay 2

RTU Example:

Transmit

01 05 00 01 ff 00 dd fa

Receive

01 05 00 01 ff 00 dd fa

TCP Example:

Transmit

MBAP 01 05 00 01 ff 00

Receive

MBAP 01 05 00 01 ff 00

Field

Bytes

Value

Description

MBAP

7

MBAP

MBAP header (see Modbus RTU / TCP)

Checksum

2

CRC

CRC Checksum (see Modbus RTU / TCP)

RTU number

1

0x01

Modbus RTU Address (RS485 Address + 1)
(see Device Descriptions)

Function code

1

0x05

Write Single Coil

Starting address

2

0x0001

= 1, means address of the 2. coil
( Attention! coil number – 1 )

Output value

2

0xff00

0xff00 for setting the selected coil
0x0000 for resetting the selected coil

Test the change with Modbus commands in example Read coil 1 to coil 8
For detailed information about Modbus protocol Write Single Coil see:

(http://modbus.org/docs/Modbus_Application_Protocol_V1_1b3.pdf).

2.2.8 Example: Write Multiple Coils

2.2.8.1 Set State of Relay 1 to 6

RTU Example:

Transmit

01 0f 00 00 00 07 01 2a 4f 49

Receive

01 0f 00 00 00 07 14 09

TCP Example:

Transmit

MBAP 01 0f 00 00 00 07 01 2a

Receive

MBAP 01 0f 00 00 00 07

Field

Bytes

Value

Description

MBAP

7

MBAP

MBAP header (see Modbus RTU / TCP)

Checksum

2

CRC

CRC Checksum (see Modbus RTU / TCP)

RTU number

1

0x01

Modbus RTU Address (RS485 Address + 1)
(see Device Descriptions)

Function code

1

0x0f

Write Multiple Coils

Starting address

2

0x0000

= 0, means address of the 1. coil
( Attention! coil number – 1 )

Quantity of outputs

2

0x0007

= 7 for coils 0 to 7

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Byte count

1

0x01

= 1 ≙ N, means quantity of coils / 8, if the remainder
is different of 0 => N = N+1

Output values

(see Relays)

N * 1

0x2a

Bit

State

State of Relais 1 to 6

0

OFF

Coil 1 = Relais 1 (ON = 1, OFF = 0)

1

ON

Coil 2 = Relais 2 (ON = 1, OFF = 0)

2

OFF

Coil 3 = Relais 3 (ON = 1, OFF = 0)

3

ON

Coil 4 = Relais 4 (ON = 1, OFF = 0)

4

OFF

Coil 5 = Relais 5 (ON = 1, OFF = 0)

5

ON

Coil 6 = Relais 6 (ON = 1, OFF = 0)

6

OFF

Not used

7

OFF

Not use

Test the change with Modbus commands in example Read coil 1 to coil 8
For detailed information about Modbus protocol Write Single Coil see:

(http://modbus.org/docs/Modbus_Application_Protocol_V1_1b3.pdf).

2.2.9 Example: Reset Device

RTU Example:

Transmit

01 05 00 20 ff 00 0d f0

Receive

01 05 00 20 ff 00 0d f0

TCP Example:

Transmit

MBAP 01 05 00 20 ff 00

Receive

MBAP 01 05 00 20 ff 00

Field

Bytes

Value

Description

MBAP

7

MBAP

MBAP header (see Modbus RTU / TCP)

Checksum

2

CRC

CRC Checksum (see Modbus RTU / TCP)

RTU number

1

0x01

Modbus RTU Address (RS485 Address + 1)
(see Device Descriptions)

Function code

1

0x05

Write Single Coil

Starting address

2

0x0020

= 32, means address of the 33. Coil (Reset Device)
( Attention! coil number – 1 )

Output value

2

0xff00

0xff00 for setting the selected action

For detailed information about Modbus protocol Write Single Coil see:
(http://modbus.org/docs/Modbus_Application_Protocol_V1_1b3.pdf).

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2.3 Device Specific Discrete Inputs (read only)

With Modbus Discrete Inputs you can get the state of the digital inputs of the CRP5.
Assisted Modbus command is Read Discrete Input (0x02).

2.3.1 Digital Inputs 1 and 2

Current state of the digital inputs of the CRP5, updated every measurement cycle, which means every
second.

Coil

Name

Type

Description

10’001

Digital Input

Bit

State of Initialization bits

0

Digital Input 1 (ON = 1, OFF = 0)

1

Digital Input 2 (ON = 1, OFF = 0)

2…15

0

10’002 …

10’063

Reserved

 Undefined

10’064 …

29’999

Reserved

 Gives back Modbus Exception Code 02

2.3.2 Example: Read Discrete Inputs

2.3.2.1 Read Modbus Coil 10'001

RTU Example:

Transmit

01 02 27 10 00 01 b2 bb

Receive

01 02 01 01 60 48

TCP Example:

Transmit

MBAP 01 02 27 10 00 01

Receive

MBAP 01 02 01 01

Field

Bytes

Value

Description

MBAP

7

MBAP

MBAP header (see Modbus RTU / TCP)

Checksum

2

CRC

CRC Checksum (see Modbus RTU / TCP)

RTU number

1

0x01

Modbus RTU Address (RS485 Address + 1)
(see Device Descriptions)

Function code

1

0x02

Read Discret Inputs

Starting address

2

0x2710

= 10'000 ( Attention! coil number – 1 )

Quantity of inputs

2

0x0001

= 1, means read 1 byte (8 bits)

Byte count

1

0x01

= 1 ≙ N, means numbers of returned bytes

Input status

(see Digital Inputs)

N * 1

0x01

Bit

State of Digital Inputs

0

Digital Input 1 (ON = 1, OFF = 0)

1

Digital Input 2 (ON = 1, OFF = 0)

2…7

not used

For detailed information about Modbus protocol Read Discrete Inputs see:
(http://modbus.org/docs/Modbus_Application_Protocol_V1_1b3.pdf).

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2.4 Device Specific Input Registers (read only)

With Modbus Input Registers you can read some device specific data of the CRP5.
Assisted Modbus command is Read Input Registers (0x04).

2.4.1 Device Data

CRP5-specific data.

Register

Name

Type

Description

30’001

Serial Number

&

 Serial number of the device (part 1)

30’002

&

 Serial number of the device (part 2)

30’003

Serial Number Probe

&

 Serial number of the CRP5-probe (part 1)

30’004

&

 Serial number of the CRP5-probe (part 2)

30’005

Device Name

 Device name (part 1 – character 1 & 2) e.g. “CR”

30’006

 Device name (part 2 – character 3 & 4) e.g. “P-“

30’007

 Device name (part 3 – character 5 & 6) e.g. “1 “

30’008

 Device name (part 4 – character 7 & 8) e.g. “ab“

30’009

 Device name (part 5 – character 9 & 10) e.g. “cd“

30’010

 Device name (part 6 – character 11 & 12) e.g. “ef“

30’011

Differential Pressure Sensor
Type

No.

Differential pressure sensor type

0

± 10Pa

1

± 25Pa

2

± 50Pa

3

± 100Pa

4

± 250Pa

5

± 500Pa

6

± 50Pa (Second source supplier)

7

± 100Pa (Second source supplier)

8

± 250Pa (Second source supplier)

30’012

Hardware Version

 Hardware version

30’013

Production Date

&!

 Production date (part 1)

30’014

&!

 Production date (part 2)

30’015

Reserved

 Undefined

30’016

Reserved

 Undefined

30’017

State of Reset

 Internal use only

30’018

State of Initialization

 Internal use only

30’019

State of Alarms

Bit

State of Alarm bits

0

Alarm Differential Pressure Hi

1

Alarm Differential Pressure Low

2

Alarm Humidity Hi

3

Alarm Humidity Low

4

Alarm Temperature Hi

5

Alarm Temperature Low

6

Alarm Calculation Hi

7

Alarm Calculation Low

8

Alarm Analog Input 1 Hi

9

Alarm Analog Input 1 Low

10

Alarm Analog Input 2 Hi

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11

Alarm Analog Input 2 Low

12

Alarm Digital Input 1

13

Alarm Digital Input 2

14…15

0

0 = alarm OFF; 1 = alarm ON

30’020

State of Other Alarms

Bit

State of Other Alarm bits

0

Internal use only

1

Internal use only

2…7

0

8

Missing Probe Maintenance

9

Internal Maintenance

10

External Maintenance

11

Calibration Back Access

12

Calibration Front Access

13…15

0

0 = alarm OFF; 1 = alarm ON

30’021

State of Relays and Valve

Bit

State of Relay/Valve bits

0

Relay 1

1

Relay 2

2

Relay 3

3

Relay 4

4

Relay 5

5

Relay 6

6…7

0

8

Valve A

9

Valve B

10

Valve C

11

Valve D

12…15

0

0 = deactivated; 1 = activated

30’022 …

30’500

Reserved

 Undefined
 Gives back Modbus Exception Code 02

&

These are 32-bit values, separated in two succeeding registers (16-bits). How to bring together part 1
and part 2 of the 32-bit value, depends on the Swap Mode of the Modbus communication (see

Device Settings -> Modbus Operation Mode and Selectable Swap Modes for Rotronic Devices)

“

Character values separated in succeeding registers, e.g. “CRP5-1 abcdef”

!

Represents the Unix Time (UTC) since 1.1.1970 in seconds

State of Alarms: Shows all possible sensor alarms. You have to enable the appropriate alarm bit and alarm
level (see “Holding Registers” -> “Alarm Settings” -> “Alarm Bits” resp. “Sensors”) before an alarm can be
activated.

State of Other Alarms: Shows all possible “other” alarms, like maintenance modes, calibration access and
differential pressure offset limits.

State of Relays and Valves: Shows the current state of the relays and valves.

2.4.2 Current Values: Float Values

Current values in 32-bit IEEE754 float format of all CRP5 sensors, updated every measurement cycle (see
“Holding Registers” -> “Device Settings” -> “Measurement Interval”).

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Note!
These values are changing every measurement cycle, so always read the two corresponding registers in

one Modbus command.
The transmitted values are always in the basic unit of the measurement.

Register

Name

Type

Description

31’001

Humidity [%rh]

&

 Current humidity value (part 1)

31’002

&

 Current humidity value (part 2)

31’003

Temperature [°C]

&

 Current temperature value (part 1)

31’004

&

 Current temperature value (part 2)

31’005

Differential Pressure [Pa]

&

 Current differential pressure value (part 1)

31’006

&

 Current differential pressure value (part 2)

31’007

Calculation [basic unit]
(Unit depends on calculation)

&

 Current calculation value (part 1)

31’008

&

 Current calculation value (part 2)

31’009

Analog Input 1 [selected unit]

&

 Current analog input 1 value (part 1)

31’010

&

 Current analog input 1 value (part 2)

31’011

Analog Input 2 [selected unit]

&

 Current analog input 2 value (part 1)

31’012

&

 Current analog input 2 value (part 2)

31’013

Digital Input 1

&

 Current digital input 1 value (part 1)

31’014

&

 Current digital input 1 value (part 2)

31’015

Digital Input 2

&

 Current digital input 2 value (part 1)

31’016

&

 Current digital input 2 value (part 2)

31’017

Ambient Pressure [hPa]

&

 Current ambient pressure value (part 1)

31’018

&

 Current ambient pressure value (part 2)

31’019

Internal Temperature

&

 Current internal temperature value (part 1)

31’020

&

 Current internal temperature value (part 2)

31’021 …

31’999

Reserved

 Undefined
 Gives back Modbus Exception Code 02

&

These are float-values (32-bit IEEE754), separated in two succeeding registers (16-bits).
How to bring together part 1 and part 2 of the 32-bit float-value, depends on the Swap Mode of the

Modbus communication (see Device SettingsDevice Settings -> Modbus Operation Mode and

Selectable Swap Modes for Rotronic Devices)

2.4.3 Current Values: Integer Values

Current values in 16-bit integer format of all CRP5 sensors, updated every measurement cycle, which
means all every second.
The current values are the result of the reduction to 16-bit values of the multiplication of the current 32-bit
IEEE754 float values (see Current Values: Float Values) and the corresponding scaling values (see Integer

Value Scaling).

Note!
The transmitted values are always in the basic unit of the measurement.

Register

Name

Type

Description

32’001

Humidity [%rh]

 Current humidity value

32’002

Temperature [°C]

 Current temperature value

32’003

Differential Pressure [Pa]

 Current differential pressure value

32’004

Calculation [basic unit]
(Unit depends on calculation)

 Current calculation value

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32’005

Analog Input 1 [selected unit]

 Current analog input 1 value

32’006

Analog Input 2 [selected unit]

 Current analog input 2 value

32’007

Digital Input 1

 Current digital input 1 value

32’008

Digital Input 2

 Current digital input 2 value

32’009

Ambient Pressure [hPa]

 Current ambient pressure value

32’010

Internal Temperature [°C]

 Current internal temperature value

32’011 …

32’999

Reserved

 Undefined
 Gives back Modbus Exception Code 02

2.4.4 FDA Data

FDA Data fields contain information about firmware update, sensor adjustments and device properties.

Register

Name

Type

Description

33’001

FDA Date FW Update

&!

 FDA date firmware update (part 1)

33’002

&!

 FDA date firmware update (part 2)

33’003

FDA ID FW Update

&

 FDA ID firmware update (part 1)

33’004

&

 FDA ID firmware update (part 2)

33’005

FDA Date DiffP. Adjust (RAG)

&!

 DA date differential pressure adjust RAG (part 1)

33’006

&!

 DA date differential pressure adjust RAG (part 2)

33’007

FDA ID DiffP. Adjust (RAG)

&

 FDA ID differential pressure adjust RAG (part 1)

33’008

&

 FDA ID differential pressure adjust RAG (part 2)

33’009

FDA Date DiffP. Adjust (User)

&!

 FDA date differential pressure adjust user (part 1)

33’010

&!

 FDA date differential pressure adjust user (part 2)

33’011

FDA ID DiffP. Adjust (User)

&

 FDA ID differential pressure adjust user (part 1)

33’012

&

 FDA ID differential pressure adjust user (part 2)

33’013

FDA Date Properties

&!

 FDA date device properties (part 1)

33’014

&!

 FDA date device properties (part 2)

33’015

FDA ID Properties

&

 FDA ID device properties (part 1)

33’016

&

 FDA ID device properties (part 2)

33’017 …

33’999

Reserved

 Undefined
 Gives back Modbus Exception Code 02

&

These are 32-bit values, separated in two succeeding registers (16-bits). How to bring together part 1
and part 2 of the 32-bit value, depends on the Swap Mode of the Modbus communication (see

Device SettingsDevice Settings -> Modbus Operation Mode and Selectable Swap Modes for
Rotronic Devices)

!

Represents the Unix Time (UTC) since 1.1.1970 in seconds

FDA Date DiffP. Adjust (User):
FDA ID DiffP. Adjust (User):
FDA Date Properties:
FDA ID Properties:

If you change the device properties or set the offset/gain of the differential pressure over the menu of the
CRP5 or Modbus, the date and ID of the FDA-fields Diffp. Adjust (User) and Properties would be changed.

Date

ID

Change in the CRP5-menu

0, representing 1.1.1970

Serial Number of the CRP5

Change over Modbus

0, representing 1.1.1970

0xFFFFFFFF

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2.4.5 Example: Read Input Register

2.4.5.1 Read Current Values: Float Value (Registers 31'001 to 31'006)

RTU Example:

Transmit

01 04 79 18 00 06 e9 53

Receive

01 04 0c 41 f3 70 a3 41 ba 00 00 3d 80 e9 a2 97 8a

TCP Example:

Transmit

MBAP 01 04 79 18 00 06

Receive

MBAP 01 04 0c 41 f3 70 a3 41 ba 00 00 3d 80 e9 a2

Field

Bytes

Value

Description

MBAP

7

MBAP

MBAP header (see Modbus RTU / TCP)

Checksum

2

CRC

CRC Checksum (see Modbus RTU / TCP)

RTU number

1

0x01

Modbus RTU Address (RS485 Address + 1)
(see Device Descriptions)

Function code

1

0x04

Read Discret Inputs

Starting address

2

0x7918

= 31'000 ( Attention! register number – 1 )

Quantity of input registers

2

0x0006

= 6, means read 6 registers

Byte count

1

0x0c

= 12 ≙ 2 * N, means numbers of returned bytes

Input registers

(see Current Values: Float

Values)

2 * N

0x41f370a3

= 30.43 %rh Humidity

0x41ba0000

= 23.25 °C Temperature

0x3d80e9a2

= 0.063 Pa Differential Pressure

For detailed information about Modbus protocol Read Discrete Inputs see:
(http://modbus.org/docs/Modbus_Application_Protocol_V1_1b3.pdf).

2.5 Device Specific Holding Registers

With Modbus Holding Registers you can read and write device specific data to the CRP5.
Assisted Modbus commands are Read Holding Registers (0x03), Write Single Register (0x06) and Write

Multiple Registers (0x10).

Attention!

Changes to register content in the CRP5 can change the functionality of the CRP5. This may cause the
CRP5 to become inoperable.

Changes of register contents should only be made with the necessary knowledge of the Modbus protocol.

2.5.1 Value Type

Selection of the possible calculation and analog input modes.

Register

Name

Type

Description

40’001

Calculation Type

!

No.

Select Calculation

0

Dew Point

1

Frost Point

2

Wet Bulb Temperature

3

Enthalpy

4

Vapour Concentration

5

Specific Humidity

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6

Mixing Ratio

7

Saturation Vapour Concentration

8

Vapour Partial Pressure

9

Vapour Saturation Pressure

40’002

Analog Input 1 Type

!

No.

Description of the Analog Input 1 type

0

Voltage Input

1

Current Input (120Ω)

40’002

Analog Input 2 Type

!

No.

Description of the Analog Input 2 type

0

Voltage Input

1

Current Input (120Ω)

40’003 …

40’099

Reserved

 Undefined
 Gives back Modbus Exception Code 02

!

Change of these registers needs a restart of the device (see Device Actions)

Calculation Type: Select the calculation showed on display (row 4), if selected (see Display Settings ->

Display Row 4).

Analog Input x Type: Select the analog input type, voltage or current (120Ω internal resistance).

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2.5.2 Value Unit

Select the unit shown on display for the different sensors and calculation values.

Register

Name

Type

Description

41’001

Temperature

For Calculation:

Dew Point, Frost Point, Wet
Bulb Temperature

!

No.

Temperature Units

0

°C 1 °F

41’002

Differential Pressure

!

No.

Differential Pressure Units

0

Pa 1 inH2O

2

mpsi 3 mbar

4

mmHg

5

mmH2O

6

Torr 7 g/cm2

40’003

Ambient Pressure

For Calculation:

Vapour Partial Pressure Vapour
Saturation Pressure

!

No.

Ambient Pressure Unit

0

hPa 1 inHg 2 psi

41’004

For Calculation:
Enthalpy

!

No.

Enthalpy Units

0

kJ/kg

1

BTI/lb

41’005

For Calculation:
Vapour Concentration
Saturation Vapour
Concentration

!

No.

Concentration Units

0

g/m3

1

g/ft3

41’006

For Calculation:
Specific Humidity
Mixing Ratio

!

No.

Weight Units

0

g/kg 1 gr/lb

41’007

Reserved

 undefined

41’008

Reserved

 undefined

41’009

Humidity

!*

 For humidity the unit is always %rh

41’010

Analog Input 1 Unit

!*

 Characters 1 & 2 of the unit of the analog input 1

41’011

!*

 Characters 3 & 4 of the unit of the analog input 1

41’012

Analog Input 2 Unit

!*

 Characters 1 & 2 of the unit of the analog input 2

41’013

!*

 Characters 3 & 4 of the unit of the analog input 2

41’014 …

41’099

Reserved

 Undefined
 Gives back Modbus Exception Code 02

!

Change of these registers needs a restart of the device (see Device Actions)

*

It is not possible to verify the value, written to this register!

Humidity: It is not possible to change the unit for humidity. It is always set to %rh.
Analog Input x Unit: Select the characters showed on display (row 4) for analog input 1/2, e.g. "ppm".

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2.5.3 Integer Value Scaling

Selection of the scaling factor of the current values for data conversion float to integer. Scaling factor should
be between 1 and 1000.

Register

Name

Type

Description

42’001

Humidity

!

 Scaling factor for the humidity value

42’002

Temperature

!

 Scaling factor for the temperature value

42’003

Differential Pressure

!

 Scaling factor for the differential pressure value

42’004

Calculation

!

 Scaling factor for the calculation value

42’005

Analog Input 1

!

 Scaling factor for the analog input 1 value

42’006

Analog Input 2

!

 Scaling factor for the analog input 1 value

42’007

Digital Input 1

!

 Scaling factor for the digital input 1 value

42’008

Digital Input 2

!

 Scaling factor for the digital input 1 value

42’009

Ambient Pressure

!

 Scaling factor for the ambient pressure value

42’010

Internal Temperature

!

 Scaling factor for the internal temperature value

42’011 …

43’999

Reserved

 Undefined
 Gives back Modbus Exception Code 02

!

Change of these registers needs a restart of the device (see Device Actions)

2.5.4 Reference Value Settings

Settings of reference values for adjustments of differential pressure, humidity and temperature (see Sensor

Actions).

Values in these registers are only valuable until the next restart of the device!

Register

Name

Type

Description

44’001

Humidity

?&*

 Reference value humidity (part 1)

44’002

?&*

 Reference value humidity (part 2)

44’003

Temperature

?&*

 Reference value temperature (part 1)

44’004

?&*

 Reference value temperature (part 2)

44’005

Differential Pressure

?&*

 Reference value differential pressure (part 1)

44’006

?&*

 Reference value differential pressure (part 2)

44’007 …

44’099

Reserved

 Undefined
 Gives back Modbus Exception Code 02

?

After reset of the device, the Reference Values are always set to 0.0

&

These are float-values (32-bit IEEE754), separated in two succeeding registers (16-bits).
How to bring together part 1 and part 2 of the 32-bit float-value, depends on the Swap Mode of the
Modbus communication (see Device Settings -> Modbus Operation Mode and Selectable Swap Modes

for Rotronic Devices)

*

It is not possible to verify the value, written to this register!

2.5.5 Device Settings

Device specific settings.

Register

Name

Type

Description

44’101

Device Bits

!

Bit

Description of the Device bits

0

Trend Enable (OFF/ON)

1…15

Reserved

44’102

Measurement Interval

 Fixed to 1 second. Cannot be changed

44’103

Logging Interval

 Not yet implemented, undefined

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44’104

Differential Pressure Filter

!

 Filter for the Differential Pressure
 0 <= filter <= 10

44’105

Device Protection

!

No.

Description of the Device Protection

171

Device Write Protection ON

x

Device Write Protection OFF

Attention! After writing this command with parameter 171, it’s not possible to overwrite the

content of the FLASH until executing the same command without parameter 171

40’106

Calculation Select

!

No.

Select Calculation

0

Dew Point

1

Frost Point

2

Wet Bulb Temperature

3

Enthalpy

4

Vapour Concentration

5

Specific Humidity

6

Mixing Ratio

7

Saturation Vapour Concentration

8

Vapour Partial Pressure

9

Vapour Saturation Pressure

The same selection as in “Holding Registers” -> “Value Type” -> “Calculation Type”

44’107

RS485 Address

!

 RS485 address
 0 <= addr <= 63
 Attention! Modbus address = RS485 address + 1

44’108

Modbus Operation Mode

!

 Modbus Operation Mode for 32-bit float and integer

values

44’109

Valve Bits

 Not yet implemented, undefined

44’110

Offset Adjust Repeat Time

!&*

 Repeat time for the automatic zero point adjustment

of differential pressure, in minutes (part 1)

44’111

!&*

 Repeat time for the automatic zero point adjustment

of differential pressure, in minutes (part 2)

44’112

Switch Bits

 Not yet implemented, undefined

44’113

Menu Protection

!

No.

Menu Protection

0

Menu protection OFF

1

Menu protection ON

44’114 …

44’199

Reserved

 Undefined
 Gives back Modbus Exception Code 02

!

Change of these registers needs a restart of the device (see Device Actions)

&

These are 32-bit values, separated in two succeeding registers (16-bits). How to bring together part 1
and part 2 of the 32-bit value, depends on the Swap Mode of the Modbus communication (see

Device Settings -> Modbus Operation Mode and Selectable Swap Modes for Rotronic Devices)

*

It is not possible to verify the value, written to this register!

Measurement Interval: It is not possible to change the measurement interval. It is fixed to 1 second.
Logging Interval: Currently the logging function is not used. The address is reserved for futures

implementation of this function.
Differential Pressure Filter: Low pass filter of the differential pressure sensor data. Possible values are

between 0 and 10. The filter number x represents the average calculation of the last actual x measurements.
0 no average, min. low pass filter function, pressure changes will be shown best.
10 max. average of the last 10 measurements of the last 10 seconds, max. low pass filter function, short

time pressure changes will damped strongly.

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Device Protection: If the device protection is set to 171, it is not possible anymore to write into the internal
FLASH! You have to write a value unequal 171 to this register to suspend the blockade.

Be careful to use this command over Modbus! If writing Modbus commands to a device with Device
Protection ON, you don’t get an error back, because the Modbus writing process was successful -

only writing to FLASH was not possible.
RS485 Address: The RS485 address is used in conjunction with a RS485 network. Each network address

should be unique and within the values of 1 to 63.

Note!
The default factory RS-485 address of the CRP5 is 0. On the menu Device Information of the CRP5, you

can see the RS485 address of the device.

Attention!
The Modbus address for Modbus RTU is always the RS485 address + 1.

Modbus Operation Mode: Defines the order of the bytes and registers of 32-bit and float-values (see

Selectable Swap Modes for Rotronic DevicesSelectable Swap Modes for Rotronic Devices).

Offset Adjust Repeat Time: Repeat time for the automatic zero point adjustment of differential pressure in
minutes.

Note!
Repeat time is minimal 1 minute, maximal 232 minutes.

Menu Protection: If set, it is not possible to select the menus of the CRP5. Only the first menu Device
Informations of the CRP5 is reachable.

2.5.6 Device Descriptions

Name for the different parts of the device, which is clearly related with its function. For Digital Input 1/2
Low/High a text which describes the meaning of the input states Low and High.

Register

Name

Type

Description

44’201

Device

“!*

 Description device (part 1 – char. 1 & 2)

44’202

“!*

 Description device (part 2 – char. 3 & 4)

44’203

“!*

 Description device (part 3 – char. 5 & 6)

44’204

“!*

 Description device (part 4 – char. 7 & 8)

44’205

“!*

 Description device (part 5 – char. 9 & 10)

44’206

“!*

 Description device (part 6 – char. 11 & 12)

44’207

Differential Pressure

“!*

 Desc. diff. pressure sensor (part 1 – char. 1 & 2)

44’208

“!*

 Desc. diff. pressure sensor (part 2 – char. 3 & 4)

44’209

“!*

 Desc. diff. pressure sensor (part 3 – char. 5 & 6)

44’210

“!*

 Desc. diff. pressure sensor (part 4 – char. 7 & 8)

44’211

“!*

 Desc. diff. pressure sensor (part 5 – char. 9 & 10)

44’212

“!*

 Desc. diff. pressure sensor (part 6 – char. 11 & 12)

44’213

Relay 1

“!*

 Description relay 1 (part 1 – char. 1 & 2)

44’214

“!*

 Description relay 1 (part 2 – char. 3 & 4)

44’215

“!*

 Description relay 1 (part 3 – char. 5 & 6)

44’216

“!*

 Description relay 1 (part 4 – char. 7 & 8)

44’217

“!*

 Description relay 1 (part 5 – char. 9 & 10)

44’218

“!*

 Description relay 1 (part 6 – char. 11 & 12)

44’219

Relay 2

“!*

 Description relay 2 (part 1 – char. 1 & 2)

44’220

“!*

 Description relay 2 (part 2 – char. 3 & 4)

D-M-CRP5-MODBUS-V1_03

Rotronic AG
Bassersdorf, Switzerland

Document code

Unit

Modbus Manual V1.03:
CRP5 Clean Room Panel

Instruction Manual

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Document title

© 2018- Rotronic AG Modbus CRP5V1.0_03

44’221

“!*

 Description relay 2 (part 3 – char. 5 & 6)

44’222

“!*

 Description relay 2 (part 4 – char. 7 & 8)

44’223

“!*

 Description relay 2 (part 5 – char. 9 & 10)

44’224

“!*

 Description relay 2 (part 6 – char. 11 & 12)

44’225

Relay 3

“!*

 Description relay 3 (part 1 – char. 1 & 2)

44’226

“!*

 Description relay 3 (part 2 – char. 3 & 4)

44’227

“!*

 Description relay 3 (part 3 – char. 5 & 6)

44’228

“!*

 Description relay 3 (part 4 – char. 7 & 8)

44’229

“!*

 Description relay 3 (part 5 – char. 9 & 10)

44’230

“!*

 Description relay 3 (part 6 – char. 11 & 12)

44’231

Relay 4

“!*

 Description relay 4 (part 1 – char. 1 & 2)

44’232

“!*

 Description relay 4 (part 2 – char. 3 & 4)

44’233

“!*

 Description relay 4 (part 3 – char. 5 & 6)

44’234

“!*

 Description relay 4 (part 4 – char. 7 & 8)

44’235

“!*

 Description relay 4 (part 5 – char. 9 & 10)

44’236

“!*

 Description relay 4 (part 6 – char. 11 & 12)

44’237

Relay 5

“!*

 Description relay 5 (part 1 – char. 1 & 2)

44’238

“!*

 Description relay 5 (part 2 – char. 3 & 4)

44’239

“!*

 Description relay 5 (part 3 – char. 5 & 6)

44’240

“!*

 Description relay 5 (part 4 – char. 7 & 8)

44’241

“!*

 Description relay 5 (part 5 – char. 9 & 10)

44’242

“!*

 Description relay 5 (part 6 – char. 11 & 12)

44’243

Relay 6

“!*

 Description relay 6 (part 1 – char. 1 & 2)

44’244

“!*

 Description relay 6 (part 2 – char. 3 & 4)

44’245

“!*

 Description relay 6 (part 3 – char. 5 & 6)

44’246

“!*

 Description relay 6 (part 4 – char. 7 & 8)

44’247

“!*

 Description relay 6 (part 5 – char. 9 & 10)

44’248

“!*

 Description relay 6 (part 6 – char. 11 & 12)

44’249

CRP5 Probe

“!*

 Description CRP5 probe (part 1 – char. 1 & 2)

44’250

“!*

 Description CRP5 probe (part 2 – char. 3 & 4)

44’251

“!*

 Description CRP5 probe (part 3 – char. 5 & 6)

44’252

“!*

 Description CRP5 probe (part 4 – char. 7 & 8)

44’253

“!*

 Description CRP5 probe (part 5 – char. 9 & 10)

44’254

“!*

 Description CRP5 probe (part 6 – char. 11 & 12)

44’255

Analog Input 1

“!*

 Description analog input 1 (part 1 – char. 1 & 2)

44’256

“!*

 Description analog input 1 (part 2 – char. 3 & 4)

44’257

“!*

 Description analog input 1 (part 3 – char. 5 & 6)

44’258

“!*

 Description analog input 1 (part 4 – char. 7 & 8)

44’259

“!*

 Description analog input 1 (part 5 – char. 9 & 10)

44’260

“!*

 Description analog input 1 (part 6 – char. 11 & 12)

44’261

Analog Input 2

“!*

 Description analog input 2 (part 1 – char. 1 & 2)

44’262

“!*

 Description analog input 2 (part 2 – char. 3 & 4)

44’263

“!*

 Description analog input 2 (part 3 – char. 5 & 6)

44’264

“!*

 Description analog input 2 (part 4 – char. 7 & 8)

44’265

“!*

 Description analog input 2 (part 5 – char. 9 & 10)

44’266

“!*

 Description analog input 2 (part 6 – char. 11 & 12)

44’267

Digital Input 1

“!*

 Description digital input 1 (part 1 – char. 1 & 2)

44’268

“!*

 Description digital input 1 (part 2 – char. 3 & 4)

44’269

“!*

 Description digital input 1 (part 3 – char. 5 & 6)

44’270

“!*

 Description digital input 1 (part 4 – char. 7 & 8)

D-M-CRP5-MODBUS-V1_03

Rotronic AG
Bassersdorf, Switzerland

Document code

Unit

Modbus Manual V1.03:
CRP5 Clean Room Panel

Instruction Manual

Document Type

Page

26 of 42

Document title

© 2018- Rotronic AG Modbus CRP5V1.0_03

44’271

“!*

 Description digital input 1 (part 5 – char. 9 & 10)

44’272

“!*

 Description digital input 1 (part 6 – char. 11 & 12)

44’273

Digital Input 2

“!*

 Description digital input 2 (part 1 – char. 1 & 2)

44’274

“!*

 Description digital input 2 (part 2 – char. 3 & 4)

44’275

“!*

 Description digital input 2 (part 3 – char. 5 & 6)

44’276

“!*

 Description digital input 2 (part 4 – char. 7 & 8)

44’277

“!*

 Description digital input 2 (part 5 – char. 9 & 10)

44’278

“!*

 Description digital input 2 (part 6 – char. 11 & 12)

44’279

Ambient Pressure

“!*

 Description ambient pressure (part 1 – char. 1 & 2)

44’280

“!*

 Description ambient pressure (part 2 – char. 3 & 4)

44’281

“!*

 Description ambient pressure (part 3 – char. 5 & 6)

44’282

“!*

 Description ambient pressure (part 4 – char. 7 & 8)

44’283

“!*

 Description ambient pressure (part 5 – char. 9 & 10)

44’284

“!*

 Description ambient pressure (part 6 – char. 11 & 12)

44’285

Digital Input 1 Text Low

”!*

 Description dig. input 1 text low (part 1 – char. 1 & 2)

44’286

“!*

 Description dig. input 1 text low (part 2 – char. 3 & 4)

44’287

“!*

 Description dig. input 1 text low (part 3 – char. 5 & 6)

44’288

“!*

 Description dig. input 1 text low (part 4 – char. 7 & 8)

44’289

“!*

 Description dig. input 1 text low (part 5 – char. 9 & 10)

44’290

“!*

 Descript. dig. input 1 text low (part 6 – char. 11 & 12)

44’291

Digital Input 1 Text High

“!*

 Description dig. input 1 text high (part 1 – char. 1 & 2)

44’292

“!*

 Description dig. input 1 text high (part 2 – char. 3 & 4)

44’293

“!*

 Description dig. input 1 text high (part 3 – char. 5 & 6)

44’294

“!*

 Description dig. input 1 text high (part 4 – char. 7 & 8)

44’295

“!*

 Descript. dig. input 1 text high (part 5 – char. 9 & 10)

44’296

“!*

 Descript. dig. input 1 text high (part 6 – char. 11 & 12)

44’297

Digital Input 2 Text Low

“!*

 Description dig. input 2 text low (part 1 – char. 1 & 2

44’298

“!*

 Description dig. input 2 text low (part 2 – char. 3 & 4)

44’299

“!*

 Description dig. input 2 text low (part 3 – char. 5 & 6)

44’300

“!*

 Description dig. input 2 text low (part 4 – char. 7 & 8)

44’301

“!*

 Description dig. input 2 text low (part 5 – char. 9 & 10)

44’302

“!*

 Descript. dig. input 2 text low (part 6 – char. 11 & 12)

44’304

Digital Input 1 Text High

“!*

 Description dig. input 2 text high (part 1 – char. 1 & 2)

44’305

“!*

 Description dig. input 2 text high (part 2 – char. 3 & 4)

44’306

“!*

 Description dig. input 2 text high (part 3 – char. 5 & 6)

44’307

“!*

 Description dig. input 2 text high (part 4 – char. 7 & 8)

44’308

“!*

 Descript. dig. input 2 text high (part 5 – char. 9 & 10)

44’309

“!*

 Descript. dig. input 2 text high (part 6 – char. 11 & 12)

44’310 …

44’399

Reserved

 Undefined
 Gives back Modbus Exception Code 02

“

Character values separated in succeeding registers

!

Change of these registers needs a restart of the device (see Device Actions)

*

It is not possible to verify the value, written to this register!

2.5.7 Fix Value Settings

Fixed values are used to simulate an output value for testing purposes. To activate the Fix Values, you have
to set the corresponding Fix Value Bit to ON. The fixed values must be within the following limits:

 Differential Pressure: ±120% of the measuring range (for instance 300 Pa for a 250 Pa sensor)
 Humidity: 0 … 100%
 Temperature: -100 … 200

D-M-CRP5-MODBUS-V1_03

Rotronic AG
Bassersdorf, Switzerland

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Unit

Modbus Manual V1.03:
CRP5 Clean Room Panel

Instruction Manual

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27 of 42

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© 2018- Rotronic AG Modbus CRP5V1.0_03

 Calculation: -9999 … 9999
 Analog Input: -9999 … 9999

Register

Name

Flags

Description

44’401

Fix Value Bits

!

Bit

Description of the Fix Value bits

0

Differential Pressure

1

Humidity

2

Temperature

3

Analog Input 1

4

Analog Input 2

5

Digital Input 1

6

Digital Input 2

7

Calculation

8…15

Reserved

0 = fix value is OFF, 1 = fix value is ON

44’402

Differential Pressure

!&*

 Fix value differential pressure (part 1)

44’403

!&*

 Fix value differential pressure (part 2)

44’404

Humidity

!&*

 Fix value humidity (part 1)

44’405

!&*

 Fix value humidity (part 2)

44’406

Temperature

!&*

 Fix value temperature (part 1)

44’407

!&*

 Fix value temperature (part 2)

44’408

Analog Input 1

!&*

 Fix value analog Input 1 (part 1)

44’409

!&*

 Fix value analog Input 1 (part 2)

44’410

Analog Input 2

!&*

 Fix value analog Input 2 (part 1)

44’411

!&*

 Fix value analog Input 2 (part 2)

44’412

Digital Input 1

!

 Fix value digital Input 1

44’413

Digital Input 2

!

 Fix value digital Input 2

44’414

Calculation

!&*

 Fix value calculation (part 1)

44’415

!&*

 Fix value calculation (part 2)

44’416 …

44’499

Reserved

 Undefined
 Gives back Modbus Exception Code 02

!

Change of these registers needs a restart of the device (see Device Actions)

&

These are float-values (32-bit IEEE754), separated in two succeeding registers (16-bits).
How to bring together part 1 and part 2 of the 32-bit float-value, depends on the Swap Mode of the
Modbus communication (see Device Settings -> Modbus Operation Mode and Selectable Swap Modes

for Rotronic Devices)

*

It is not possible to verify the value, written to this register!

2.5.8 Analog Output Settings

The CRP5 can provide up to four analog output signals. The analog signal type can be set individually to
every analog output.

Register

Name

Flags

Description

44’501

Source for Analog Output 1

!

No.

Select Source

0

Unused

1

Differential Pressure

2

Humidity

3

Temperature

4

Analog Input 1

5

Analog Input 2

6

Digital Input 1

D-M-CRP5-MODBUS-V1_03

Rotronic AG
Bassersdorf, Switzerland

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Modbus Manual V1.03:
CRP5 Clean Room Panel

Instruction Manual

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7

Digital Input 2

44’502

Output Range Analog Output 1

!

No.

Select Output Range

0

Output Range 0…1V

1

Output Range 0…5V

2

Output Range 0…10V

3

Output Range 0…20mA

4

Output Range 4…20mA

44’503

Scale Low Analog Output 1

!*

 Output value scale low

44’504

Scale High Analog Output 1

!*

 Output value scale high

44’505

Source for Analog Output 2

!

No.

Select Source

-

Same as for Analog Output 1

44’506

Output Range Analog Output 2

!

No.

Select Output Range

-

Same as for Analog Output 1

44’507

Scale Low Analog Output 2

!*

 Output value scale low

44’508

Scale High Analog Output 2

!*

 Output value scale high

44’509

Source for Analog Output 3

!

No.

Select Source

-

Same as for Analog Output 1

44’510

Output Range Analog Output 3

!

No.

Select Output Range

-

Same as for Analog Output 1

44’511

Scale Low Analog Output 3

!*

 Output value scale low

44’512

Scale High Analog Output 3

!*

 Output value scale high

44’513

Source for Analog Output 4

!

No.

Select Source

-

Same as for Analog Output 1

44’514

Output Range Analog Output 4

!

No.

Select Output Range

-

Same as for Analog Output 1

44’515

Scale Low Analog Output 4

!*

 Output value scale low

44’516

Scale High Analog Output 4

!*

 Output value scale high

44’517

Load Value Analog Output 1

!

 Load value used at the analog output 1, used only by

selected output range 3 and 4 (0/4 to 20 [mA])

 0 [Ω] <= Load <= 500 [Ω]

44’518

Load Value Analog Output 2

!

 Load value used at the analog output 2, used only by

selected output range 3 and 4 (0/4 to 20 [mA])

 0 [Ω] <= Load <= 500 [Ω]

44’519

Load Value Analog Output 3

!

 Load value used at the analog output 3, used only by

selected output range 3 and 4 (0/4 to 20 [mA])

 0 [Ω] <= Load <= 500 [Ω]

44’520

Load Value Analog Output 4

!

 Load value used at the analog output 4, used only by

selected output range 3 and 4 (0/4 to 20 [mA])

 0 [Ω] <= Load <= 500 [Ω]

44’521 …

44’599

Reserved

 Undefined
 Gives back Modbus Exception Code 02

!

Change of these registers needs a restart of the device (see Device Actions)

*

It is not possible to verify the value, written to this register!

Output Range Analog Output x: Select a possible analog output range (Voltage or Current).
Scale Low/High: Enter the numerical values corresponding to the analog signal minimum and maximum

output values (Output Range Analog Output x). The Scale Low/High Values must be between -32'768 to
32'767 in steps of 1.

D-M-CRP5-MODBUS-V1_03

Rotronic AG
Bassersdorf, Switzerland

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Modbus Manual V1.03:
CRP5 Clean Room Panel

Instruction Manual

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© 2018- Rotronic AG Modbus CRP5V1.0_03

Example with fixed Output Range of 0…10 [V]:
With a changed input scale, the input and the fixed output ranges can be adapted to the customer's needs.

Input Scale

Fixed Output Range

Analog Output

Scale Low

-32'768 to +32767

Range Low

0 [V]

Scale High

-32'768 to +32767

Range High

10 [V]

The input value in the range of -100 to +200 [Pa] will be scaled to the output value in the range of 0 to

10 [V]. This means that a measured value of 0 [Pa] is shown on the analog output as a value of 3.333 [V].

Calculation:

2.5.9 Display Settings

Adjustments to the CRP5 display concerning appearance and content can be configured.

Register

Name

Flags

Description

44’601

Display Bits

!

 Not yet used, undefined

44’602

Display Row 1

!

No.

Select Display Row 1

0

Differential Pressure

1

Humidity

2

Temperature

44’603

Display Row 2

!

No.

Select Display Row 2

-

Same as for Display Row 1

44’604

Display Row 3

!

No.

Select Display Row 3

-

Same as for Display Row 1

44’605

Display Row 4

!

No.

Select Display Row 4

0

None

1

Calculation

2

Analog Input 1

2

Analog Input 2

44’606

Display Row 5

!

No.

Select Display Row 5

0

None

1

Digital Input 1

2

Digital Input 2

2

Ambient Pressure

44’607

Display Row 6

!

No.

Select Display Row 6

-

Same as for Display Row 5

44’608

Reserved

 Undefined

44’609

Reserved

 Undefined

D-M-CRP5-MODBUS-V1_03

Rotronic AG
Bassersdorf, Switzerland

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Modbus Manual V1.03:
CRP5 Clean Room Panel

Instruction Manual

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44’610

Pixel Color

!*

 Pixel Color (see Example Colors)

44’611

Pixel Color Alarm

!*

 Pixel Color Alarm (see Example Colors)

44’612

Reserved

 Undefined

44’613

Reserved

 Undefined

44’614

Background Color

!*

 Background Color (see Example Colors)

44’615

Brightness

!

No.

Select Brightness Value

0

Display Brightness 100%

1

Display Brightness 90%

2

Display Brightness 80%

3

Display Brightness 70%

4

Display Brightness 60%

5

Display Brightness 50%

6

Display Brightness 40%

7

Display Brightness 30%

8

Display Brightness 20%

44’616 …

44’699

Reserved

 Undefined
 Gives back Modbus Exception Code 02

!

Change of these registers needs a restart of the device (see Device Actions)

*

It is not possible to verify the value, written to this register!

Example

Colors

Color Bits:
Red Green Blue

e.g. Red

2.5.10 Alarm Settings

For most sensors, it is possible to set alarm values to Low, High and Hysteresis. Values of the selected
sensor that are below the Low Alarm value or above the High Alarm value will trigger an alarm. The value
specified for the alarm function Hysteresis is used for both the Low and the High Alarm.
To activate the alarm, you have to set the corresponding Alarm Bit to ON.
Be sure to select alarm values inside the operating range of the sensors.

Register

Name

Flags

Description

44’701

Alarm Bits

!

Bit

Description of the Alarm bits

0

Differential Pressure

1

Humidity

2

Temperature

3

Calculation

4

Analog Input 1

5

Analog Input 2

6

Digital Input 1

7

Digital Input 2

8…15

Reserved

0 = Alarm Value is OFF, 1 = Alarm Value is ON

44’702

Differential Pressure Low

!&*

 Alarm value differential pressure low (part 1)

44’703

!&*

 Alarm value differential pressure low (part 2)

44’704

Differential Pressure High

!&*

 Alarm value differential pressure high (part 1)

44’705

!&*

 Alarm value differential pressure high (part 2)

44’706

Differential Pressure Hysteresis

!&*

 Alarm value differential pressure hysteresis (part 1)

44’707

!&*

 Alarm value differential pressure hysteresis (part 2)

44’708

Humidity Low

!&*

 Alarm value humidity low (part 1)

44’709

!&*

 Alarm value humidity low (part 2)

D-M-CRP5-MODBUS-V1_03

Rotronic AG
Bassersdorf, Switzerland

Document code

Unit

Modbus Manual V1.03:
CRP5 Clean Room Panel

Instruction Manual

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31 of 42

Document title

© 2018- Rotronic AG Modbus CRP5V1.0_03

44’710

Humidity High

!&*

 Alarm value humidity high (part 1)

44’711

!&*

 Alarm value humidity high (part 2)

44’712

Humidity Hysteresis

!&*

 Alarm value humidity hysteresis (part 1)

44’713

!&*

 Alarm value humidity hysteresis (part 2)

44’714

Temperature Low

!&*

 Alarm value temperature low (part 1)

44’715

!&*

 Alarm value temperature low (part 2)

44’716

Temperature High

!&*

 Alarm value temperature high (part 1)

44’717

!&*

 Alarm value temperature high (part 2)

44’718

Temperature Hysteresis

!&*

 Alarm value temperature hysteresis (part 1)

44’719

!&*

 Alarm value temperature hysteresis (part 2)

44’720

Calculation Low

!&*

 Alarm value calculation low (part 1)

44’721

!&*

 Alarm value calculation low (part 2)

44’722

Calculation High

!&*

 Alarm value calculation high (part 1)

44’723

!&*

 Alarm value calculation high (part 2)

44’724

Calculation Hysteresis

!&*

 Alarm value calculation hysteresis (part 1)

44’725

!&*

 Alarm value calculation hysteresis (part 2)

44’726

Analog Input 1 Low

!&*

 Alarm value analog input 1 low (part 1)

44’727

!&*

 Alarm value analog input 1 low (part 2)

44’728

Analog Input 1 High

!&*

 Alarm value analog input 1 high (part 1)

44’729

!&*

 Alarm value analog input 1 high (part 2)

44’730

Analog Input 1 Hysteresis

!&*

 Alarm value analog input 1 hysteresis (part 1)

44’731

!&*

 Alarm value analog input 1 hysteresis (part 2)

44’732

Analog Input 2 Low

!&*

 Alarm value analog input 2 low (part 1)

44’733

!&*

 Alarm value analog input 2 low (part 2)

44’734

Analog Input 2 High

!&*

 Alarm value analog input 2 high (part 1)

44’735

!&*

 Alarm value analog input 2 high (part 2)

44’736

Analog Input 2 Hysteresis

!&*

 Alarm value analog input 2 hysteresis (part 1)

44’737

!&*

 Alarm value analog input 2 hysteresis (part 2)

44’738

Digital Input 1

!

 Alarm Value Digital Input 1

44’739

Digital Input 2

!

 Alarm Value Digital Input 2

44’740 …

44’799

Reserved

 Undefined
 Gives back Modbus Exception Code 02

!

Change of these registers needs a restart of the device (see Device Actions)

&

These are float-values (32-bit IEEE754), separated in two succeeding registers (16-bits).
How to bring together part 1 and part 2 of the 32-bit float-value, depends on the Swap Mode of the
Modbus communication (see Device Settings -> Modbus Operation Mode and Selectable Swap Modes

for Rotronic Devices)

*

It is not possible to verify the value, written to this register!

D-M-CRP5-MODBUS-V1_03

Rotronic AG
Bassersdorf, Switzerland

Document code

Unit

Modbus Manual V1.03:
CRP5 Clean Room Panel

Instruction Manual

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2.5.11 Relay Settings

Settings of Relays for all Sensors.
IMPORTANT: In order to make use of the CRP5 relay outputs, you must first enable the alarm function for
each of the parameters that you want to monitor and also define out-of-limit values.

Register

Name

Flags

Description

44’801

Relay 1: Alarm Source

!

No.

Select Alarm Source

0

Alarm: Off

1

Alarm: Differential Pressure Low

2

Alarm: Differential Pressure High

3

Alarm: Humidity Low

4

Alarm: Humidity High

5

Alarm: Temperature Low

6

Alarm: Temperature High

7

Alarm: Calculation Low

8

Alarm: Calculation High

9

Alarm: Analog Input 1 Low

10

Alarm: Analog Input 1 High

11

Alarm: Analog Input 2 Low

12

Alarm: Analog Input 2 High

13

Alarm: Digital Input 1 Low

14

Alarm: Digital Input 1 High

15

Alarm: Digital Input 2 Low

16

Alarm: Digital Input 2 High

44’802

Relay 1: Alarm Off after…

!

Bit

Select Alarm Off

0

Relay 1 Off when Alarm ends

1

Relay 1 Off after Timeout

2..15

Reserved

Attention! If no bit is set, the relay stays energized until you de-energize it manually!

44’803

Relay 1: On Delay for Relay 1

!*

 Switch on delay for relay 1 in seconds

44’804

Relay 1: Off Timeout

!*

 Maximal alarm time for relay 1 in seconds

44’805

Relay 2: Alarm Source

!

No.

Select Alarm Source

-

Same as for Relay 1

44’806

Relay 2: Alarm Off after…

!

Bit

Select Alarm Off

-

Same as for Relay 1

44’807

Relay 2: On Delay

!*

 Switch on delay for relay 2 in seconds

44’808

Relay 2: Off Timeout

!*

 Maximal alarm time for relay 2 in seconds

44’809

Relay 3: Alarm Source

!

No.

Select Alarm Source

-

Same as for Relay 1

44’810

Relay 3: Alarm Off after…

!

Bit

Select Alarm Off

-

Same as for Relay 1

44’811

Relay 3: On Delay

!*

 Switch on delay for relay 3 in seconds

44’812

Relay 3: Off Timeout

!*

 Maximal alarm time for relay 3 in seconds

44’813

Relay 4: Alarm Source

!

No.

Select Alarm Source

-

Same as for Relay 1

44’814

Relay 4: Alarm Off after…

!

Bit

Select Alarm Off

-

Same as for Relay 1

44’815

Relay 4: On Delay

!*

 Switch on delay for relay 4 in seconds

44’816

Relay 4: Off Timeout

!*

 Maximal alarm time for relay 4 in seconds

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44’8017

Relay 5: Alarm Source

!

No.

Select Alarm Source

-

Same as for Relay 1

44’818

Relay 5: Alarm Off after…

!

Bit

Select Alarm Off

-

Same as for Relay 1

44’819

Relay 5: On Delay

!*

 Switch on delay for relay 5 in seconds

44’820

Relay 5: Off Timeout

!*

 Maximal alarm time for relay 5 in seconds

44’821

Relay 6: Alarm Source

!

No.

Select Alarm Source

-

Same as for Relay 1

44’822

Relay 6: Alarm Off after…

!

Bit

Select Alarm Off

-

Same as for Relay 1

44’823

Relay 6: On Delay

!*

 Switch on delay for relay 6 in seconds

44’824

Relay 6: Off Timeout

!*

 Maximal alarm time for relay 6 in seconds

44’825 …

44’899

Reserved

 Undefined
 Gives back Modbus Exception Code 02

!

Change of these registers needs a restart of the device (see Device Actions)

*

It is not possible to verify the value, written to this register!

On Delay: If the time delay in seconds is not set to zero, the relay will be energized after the specified time
provided that the alarm condition persists. Use this control if you want to prevent the relay from being
immediately energized when an alarm occurs, e. g. to avoid short time alarms or alarm on-off toggling.
Range: 1 to 216 seconds.

Off Timeout: Time in seconds between the occurrence of the trigger criterion and the de-energizing of the
relay. This timeout will be active when Off after Timeout is chosen.
Range: 1 to 216 seconds.

Off when Alarm ends: The relay will be de-energized as soon as the alarm condition ends.
Off after Timeout: When set, the relay will remain energized for the specified duration even if the alarm

condition has ended.

Note!
When both options are enabled – Off when Alarm ends and Off after Timeout – the relay will be de-

energized as soon as one of the conditions has ended, either the end of the alarm or the end of timeout.

Attention!
When both options are disabled – Off when Alarm ends and Off after Timeout – the relay will never be

de-energized. The relay can only be de-energized manually (see Relays 1 to 6).

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2.5.12 Analog Input Settings

Voltage or current type Analog Input 1/2.
The maximum detectable voltage range is 0…3300 mV, the maximum detectable current range 0…27 mA.

Register

Name

Flags

Description

44’901

Analog Input Bits

!

Bit

Description of the Analog Input bits

0

Auto Unit: Analog Input 1

1

Auto Unit: Analog Input 2

2…15

Reserved

44’902

Analog Input 1 Select

!

No.

Select Analog Input 1 Source

0

Voltage Input

1

Current Input (120Ω)

The same value as in Value Type -> Analog Input 1 Select

44’903

Analog Input 2 Select

!

No.

Select Analog Input 2 Source

0

Voltage Input

1

Current Input (120Ω)

The same value as in Value Type -> Analog Input 2 Select

44’904

Analog Input 1 Range Low

!*

 Analog input 1 input range low

44’905

Analog Input 1 Range High

!*

 Analog input 1 input range high

44’906

Analog Input 1 Scale Low

!*

 Analog input 1 scale low

44’907

Analog Input 1 Scale High

!*

 Analog input 1 scale high

44’908

Analog Input 2 Range Low

!*

 Analog input 2 input range low

44’909

Analog Input 2 Range High

!*

 Analog input 2 input range high

44’910

Analog Input 2 Scale Low

!*

 Analog input 2 scale low

44’911

Analog Input 2 Scale High

!*

 Analog input 2 scale high

44’912 …

44’999

Reserved

 Undefined
 Gives back Modbus Exception Code 02

!

Change of these registers needs a restart of the device (see Device Actions)

*

It is not possible to verify the value, written to this register!

Auto Unit: Analog Input x: If the field Analog Input Unit x in the section Value Unit (see Value Unit

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Value Unit) is empty the following automatic unit will be used:

Analog Input x Select

Voltage

Current

Auto Unit

mV

mA

If the field Analog Input Unit x in the section Value Unit (see Value Unit

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Value Unit) is not empty, e.g. set to [ppm], the unit in the field Analog Input Unit x will be used, in this case
[ppm].

Analog Input x Range Low/High: Minimum and maximum of the output range of the connected external
device. The values must be within the maximum detectable voltage/current ranges selected Analog Input 1/2

Select (see examples), in steps of 1 [mV] resp. 1 [mA].
Analog Input x Scale Low/High: Minimum and maximum of the measure range to scale the input (see

examples). The Scale Low/High Values must be between -9'999 to 32767 in steps of 1.

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Example voltage measurement:

With a changed input range and a scaled output range, the input and the output ranges can be adapted to
the customer's needs. The unit used can be adapted to the output signal.

Input Range

Output Range

Voltage measurement

Range Low

>= 0 [mV]

Scale Low

-9'999 to +32767

Range High

<= 3'300 [mV]

Scale High

-9'999 to +32767

The input value in the range of 400 to 2'500 [mV] will be scaled to the output value in the range of 800 to

2'000 [ppm]. This means that an input value of 1'050 [mV] is shown on the display as a value of 1171.4

[ppm].

Calculation:

The unit [ppm] must be set (see Value Unit

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Value Unit -> Analog Input 1/2 Unit to [ppm]).

Example current measurement:

With a changed input range and a scaled output range, the input and the output ranges can be adapted to
the customer's needs. The unit used can be adapted to the output signal.

Input Range

Output Range

Current measurement

Range Low

>= 0 [mA]

Scale Low

-9'999 to +32767

Range High

<= 27 [mA]

Scale High

-9'999 to +32767

The input value in the range of 4 to 20 [mA] will be scaled to the output value in the range of -20 to +100

[°C]. This means that an input value of 9.6 [mA] is shown on the display as a value of 22.0 [°C].

Calculation:

The unit [°C] must be set (see Value Unit

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Value Unit -> Analog Input 1/2 Unit to [°C]).

2.5.13 Ethernet Settings

It is possible to enter the IP address of the CRP5, the Subnet mask and the Gateway IP-address to make
the CRP5 accessible from inside and outside of the existing LAN.

In case of the factory Ethernet setting of the CRP5 does not fit the existing LAN infrastructure, the easiest
method to configure these settings by communication via Rotronic Service interface. Please use the AC3006
cable for that. Also the use of RS485 is possible. Both ways supports the Modbus RTU protocol.

Register

Name

Flags

Description

45’001

Ethernet Bits

 Not yet used, undefined

45’002

Ethernet IP Address

!*

 Ethernet IP address (part 1) e.g. 0xC0A8

45’003

!*

 Ethernet IP address (part 2) e.g. 0x6465

45’004

Ethernet Subnet Mask

!*

 Ethernet subnet mask (part 1) e.g. 0xFFFF

45’005

!*

 Ethernet subnet mask (part 2) e.g. 0xFF00

45’006

Ethernet Gateway Address

!*

 Ethernet gateway address (part 1) e.g. 0xC0A8

45’007

!*

 Ethernet gateway address (part 2) e.g. 0x6401

45’008 …

45’099

Reserved

 Undefined
 Gives back Modbus Exception Code 02

!

Change of these registers needs a restart of the device (see Device Actions)

*

It is not possible to verify the value, written to this register!

Ethernet IP Address: Ethernet Address, e.g. 192.168.100.101 (0xC0.0xA8.0x64.0x65)

Note!
On the menu Device Information, you can see the IP address of the device.

Ethernet Subnet Mask: Subnet Mask, e.g. 255.255.255.0 (0xFF.0xFF.0xFF.0x00)
Ethernet Gateway Address: Gateway Address, e.g. 192.168.100.1 (0xC0.0xA8.0x64.0x01)

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2.5.14 Example: Read Holding Register

2.5.14.1 Read Display Settings (Registers 44'602 to 44'607)

RTU Example:

Transmit

01 03 ae 39 00 06 35 2d

Receive

01 03 0c 00 01 00 00 00 02 00 01 00 01 00 02 59 8d

TCP Example:

Transmit

MBAP 01 03 ae 39 00 06

Receive

MBAP 01 03 0c 00 01 00 00 00 02 00 01 00 01 00 02

Field

Bytes

Value

Description

MBAP

7

MBAP

MBAP header (see Modbus RTU / TCP)

Checksum

2

CRC

CRC Checksum (see Modbus RTU / TCP)

RTU number

1

0x01

Modbus RTU Address (RS485 Address + 1)
(see Device Descriptions)

Function code

1

0x03

Read Holding Register

Starting address

2

0xae39

= 44'601 ( Attention! register number – 1 )

Quantity of registers

2

0x0006

= 6, means read 6 registers

Byte count

1

0x0c

= 12 ≙ 2 * N, means numbers of returned bytes

Register value

(see Display Settings)

2 * N

0x0001

Display Row 1: Humidity

0x0000

Display Row 2: Differential Pressure

0x0002

Display Row 3: Temperature

0x0001

Display Row 4: Calculation

0x0001

Display Row 5: Digital Input 1

0x0002

Display Row 6: Digital Input 2

For detailed information about Modbus protocol Read Holding Register, see:
(http://modbus.org/docs/Modbus_Application_Protocol_V1_1b3.pdf).

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2.5.15 Example: Write Holding Register

2.5.15.1 Write Display Settings (Registers 44'602 to 44'607)

RTU Example:

Transmit

01 10 ae 39 00 06 0c 00 00 00 01 00 02 00 02 00 02 00 01 f3 44

Receive

01 10 ae 39 00 06 b0 ee

TCP Example:

Transmit

MBAP 01 10 ae 39 00 06 0c 00 00 00 01 00 02 00 02 00 02 00 01

Receive

MBAP 01 10 ae 39 00 06

Field

Bytes

Value

Description

MBAP

7

MBAP

MBAP header (see Modbus RTU / TCP)

Checksum

2

CRC

CRC Checksum (see Modbus RTU / TCP)

RTU number

1

0x01

Modbus RTU Address (RS485 Address + 1)
(see Device Descriptions)

Function code

1

0x10

Write Multiple Register

Starting address

2

0xae39

= 44'601 ( Attention! register number – 1 )

Quantity of registers

2

0x0006

= 6, means read 6 registers

Byte count

1

0x0c

= 12 ≙ 2 * N, means numbers of returned bytes

Register value

(see Display Settings)

2 * N

0x0000

Display Row 1: Differential Pressure

0x0001

Display Row 2: Humidity

0x0002

Display Row 3: Temperature

0x0002

Display Row 4: Analog Input 1

0x0002

Display Row 5: Digital Input 2

0x0001

Display Row 6: Digital Input 1

Note!
After writing a Write Multiple Register command, it needs a restart of the device (see Device Actions or

Reset Device) to activate the selected changes.

For detailed information about Modbus protocol Write Multiple Register, see:
(http://modbus.org/docs/Modbus_Application_Protocol_V1_1b3.pdf).

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3 Document Releases

Release

Software Ver.

Date

Notes

_01

1.0

30.07.2015

Original release

_02

1.2

03.01.2018

Updated

_03

1.2

31.01.2018

Examples and more information included