Rotronic PF4, PF5 Manual

Modbus Manual Version 1.3

-

Modbus Manual for PF4/5

PF4/5 – Bedienungsanleitung

Seite 2

1. 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 PF4/5 Modbus Fields and Mapping ......................................................................................................... 5

2.1 PF4/5 Modbus Fields ................................................................................................................................ 5

2.2 Device Specific Coils ................................................................................................................................. 5

2.2.1 Relay and Valve ................................................................................................................................... 5

2.2.2 Sensor Actions ..................................................................................................................................... 6

2.2.3 Device Actions ..................................................................................................................................... 8

2.2.4 Example: Read Single Coil .................................................................................................................. 9

2.2.5 Example: Write Single Coil ................................................................................................................ 10

2.2.6 Example: Reset Device ..................................................................................................................... 10

2.3 Device Specific Discrete Inputs (read only) ............................................................................................ 11

2.4 Device Specific Input Registers (read only) ............................................................................................ 12

2.4.1 Device Data ....................................................................................................................................... 12

2.4.2 Current Values: Float Values ............................................................................................................. 15

2.4.3 Current Values: Integer Values .......................................................................................................... 15

2.4.4 Explanation of Flags .......................................................................................................................... 16

2.4.5 Example: Read Input Register ........................................................................................................... 16

2.5 Device Specific Holding Registers .......................................................................................................... 18

2.5.1 Value Type ......................................................................................................................................... 18

2.5.2 Value Unit .......................................................................................................................................... 19

2.5.3 Integer Value Scaling ......................................................................................................................... 20

2.5.4 Reference Value Settings .................................................................................................................. 21

2.5.5 Device Specific Settings .................................................................................................................... 21

2.5.6 Device Descriptions ........................................................................................................................... 23

2.5.7 Fix Value Settings .............................................................................................................................. 25

2.5.8 Analog Output Settings ...................................................................................................................... 26

2.5.9 Display Settings ................................................................................................................................. 29

2.5.10 Alarm Settings................................................................................................................................ 31

2.5.11 Relay Settings ................................................................................................................................ 35

2.5.12 Analog Input Settings ..................................................................................................................... 37

PF4/5 – Bedienungsanleitung

Seite 3

Flow Settings ................................................................................................................................. 40

2.5.13

2.5.14 Explanation of Flags ...................................................................................................................... 41

2.5.15 Example: Read Holding Register................................................................................................... 41

2.5.16 Example: Write Holding Register ................................................................................................... 43

3 Document Releases ................................................................................................................................ 44

1 Modbus protocol

The PF4/5 can handle Modbus RTU (asynchronous communication over RS485) and Modbus TCP (clientserver 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 PF4/5 can change the functionality of the PF4/5. This may cause the PF4/5 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 PF4/5 handles Modbus RTU over the included RS485 interface. The communication parameters are 19200 Baud, 8-bit data, no parity, one stop bit and cannot be changed.

1.1.1.2 Modbus TCP

Modbus TCP is a client-server communication protocol over Ethernet. The PF4/5 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.

Attention!

• Active Modbus TCP Connection If no Modbus request is sent during an active Modbus communication for more than 30 seconds, the active TCP socket is reset and must be reopened for a new Modbus request

• Physical interruption of the Ethernet line After a physical interruption of the Ethernet line, the Ethernet connection with the PF4/5 cannot be re-established for at least 30 seconds

PF4/5 – Bedienungsanleitung

Modbus RTU Message

Slave ID

Command

Data

CRC

PDU

Modbus TCP Message

Transaction ID

Protocol ID

Length

Unit ID

Command

Data

MBAP-Header

PDU

Modbus Field N

MSB

LSB

12

34

Byte x

Byte x+1

MSB

LSB

SEEEEEEE

EMMMMMMM

MMMMMMMM

Modbus Field N

Modbus Field N+1

LSB

MSB

MMMMMMMM

SEEEEEEE

EMMMMMMM

Byte x

Byte x+1

Byte x+2

Byte x+3

MSB

LSB

12

34

56

78

Seite 4

1.1.1.3 Difference between Modbus RTU and TCP

A Modbus RTU message looks like:

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

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

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

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

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

1.2.3 32-bit Integer Value

Example: Integer Value 0x12345678

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.

PF4/5 – Bedienungsanleitung

Modbus Field N

Modbus Field N+1

LSB

MSB 56

78

12

34

Byte x

Byte x+1

Byte x+2

Byte x+3

Swap Mode

Source Bytes

Target Bytes

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 ]

Primary Tables

Type

Read / Write

Coils / Registers

Function Code

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

0x03

Read Holding Registers

0x06

Write Single Register

0x10

Write Multiple Registers

Seite 5

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.

1.2.4 Selectable Swap Modes for Rotronic Devices

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

2

PF4/5 Modbus Fields and Mapping

2.1 PF4/5 Modbus Fields

Coils Bit Read/Write 1 … 9’999

Holding Registers 16-bit Read/Write 40’001 … 49’999

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!

Function Codes 0x02 and 0x0F are not supported by PF4/5 device.

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). Modbus Command Write Multiple Coils (0x0F) is not supported.

2.2.1 Relay and Valve

Command to energize/de-energize the relay and/or the valve of the PF4/5 manually.

PF4/5 – Bedienungsanleitung

Coil

Name

Flags

Description

• Get state of relay Switch relay ON/OFF



manually. The relay will be de-energized every measuring cycle, when alarm is off

• Get state of valve

• Switch valve ON/OFF

 Note:

effect

2…8

Reserved

• Undefined

*

An energized relay/valve stays energized until the related coil is de-energized

Coils

Name

Flags

Description

Zero Adjustment of Differential Pressure

 This action takes about 15 seconds to execute. During this time, communication with the device

is not possible

• Acquire a previously set reference value (see

Reference Value Settings)

Delete Acquired Differential Pressure Data

• The acquired data will be transferred to the

Table)

• Acquire a previously set reference value (see

Reference Value Settings)

 Only available for devices including HC2A Probe

• Deletes all previously acquired values

 Only available for devices including HC2A Probe

• The acquired data will be transferred to the

HC2A Probe

 Only available for devices including HC2A Probe

Seite 6

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.

Relay *

1

If in Relay Settings one or more Relay Alarm Bits are set, it is not possible to energize the relay

Valve *

2

A Valve is only included in PF5 devices. In PF4 devices activating the Valve will have no

•

2.2.2 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 supported.

9

10

11

12

13 Acquire Humidity Data *

14 Delete Acquired Humidity Data

15 Adjust Acquired Humidity Data !

Acquire Differential Pressure Data

Adjust Acquired Differential Pressure Data

• Zero adjust of the differential pressure sensor

*

• Deletes all previously acquired values

!

corresponding lookup table (Customer Lookup

PF4/5 – Bedienungsanleitung



not possible

• The previously set reference temperature (see

temperature sensor

Only available for devices including HC2A or

Pt100 Probe

Before acquiring data, a reference value must be set (see Reference Value Settings)

temperature adjustment)

!

The device must be restarted to take over the new data (see Device Actions)

Seite 7

This action takes about 2 seconds to execute. During this time, communication with the device is

16 Adjust Temperature Data * !

*

It’s possible to acquire more than one reference value before executing the adjustment (not for

Reference Value Settings) will be sent to the



PF4/5 – Bedienungsanleitung

Coils

Name

Flags

Description

17

Reset Device

• Restart device

 The device will be restarted. Communication will get lost

• All device-relevant data will be stored in the

(factory) settings in the memory

• All device-relevant data will be restored from the

overwritten by the factory settings in memory

• All device-relevant data will be restored from the

be overwritten by the factory settings in memory

21 … 64

Reserved

• Undefined

• Gives back Modbus Exception Code 02

*

During these action, communication with the device is not possible

Attention!

Customer Lookup Table) are also deleted

Seite 8

2.2.3 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.

18 Store Device Settings *

19 Restore All Device Settings * !

20

65 …

9’999

!

Restore Device Settings without Communication Data

Reserved

All customer settings for the Differential Pressure (Zero Adjustment (Offset), Acquired Data,

memory

• Executing this command, will overwrite older

memory to the device

• All individual device settings by customer will be

memory to the device except communication

* !

parameter (Ethernet, RS485)

• All individual device settings by customer, except

communication parameter (Ethernet, RS485) will

PF4/5 – Bedienungsanleitung

Transmit

01 01 00 00 00 01 fd ca Receive

01 01 01 01 90 48

Transmit

MBAP 01 01 00 00 00 01 Receive

MBAP 01 01 01 01

By

MBAP

7

MBAP

MBAP header (see Modbus RTU / TCP)

Checksum

2

CRC

CRC Checksum (see Modbus RTU / TCP)

Modbus RTU Address (see Device Descriptions)

Function code

1

0x01

Read Single Coil

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

= 1

8 to 15 will give back 2 bytes (16 coils) etc.

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

n = N or N+1 = 8 bits

Bit

State

State of Relais 1 to 6

0

ON

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

Coil 2 = Valve (ON = 1, OFF = 0) (Valve exist only with PF5)

2

OFF

Not used

3

OFF

Not used

4

OFF

Not used

5

OFF

Not used

6

OFF

Not used

7

OFF

Not use

Seite 9

2.2.4 Example: Read Single Coil

2.2.4.1 Read Relay

Initial situation: The relays 1 is set, Valve (only PF5) doesn’t exist.

RTU Example:

TCP Example:

Field

tes Value Description

RTU number 1 0x01

Starting address 2 0x0000

Quantity of coils 2 0x0001

Byte count 1 0x01

Coil status

(see Relay and

n 0x01

Valve)

1 to 7 gives the same result 1 byte (8 coils)

1 OFF

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

).

PF4/5 – Bedienungsanleitung

Transmit

01 05 00 00 ff 00 8c 3a

Receive

01 05 00 00 ff 00 8c 3a

Transmit

MBAP 01 05 00 00 ff 00

Receive

MBAP 01 05 00 00 ff 00 Field

Bytes

Value

Description

MBAP

7

MBAP

MBAP header (see Modbus RTU / TCP)

Checksum

2

CRC

CRC Checksum (see Modbus RTU / TCP)

Modbus RTU Address (see Device Descriptions)

Function code

1

0x05

Write Single Coil

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

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

Transmit

01 05 00 10 ff 00 8d ff

Receive

01 05 00 10 ff 00 8d ff

Transmit

MBAP 01 05 00 10 ff 00

Receive

MBAP 01 05 00 10 ff 00 Field

Bytes

Value

Description

MBAP

7

MBAP

MBAP header (see Modbus RTU / TCP)

Checksum

2

CRC

CRC Checksum (see Modbus RTU / TCP)

Modbus RTU Address (see Device Descriptions)

Function code

1

0x05

Write Single Coil

Seite 10

2.2.5 Example: Write Single Coil

2.2.5.1 Set State of Relay

RTU Example:

TCP Example:

RTU number 1 0x01

Starting address 2 0x0000

Output value 2 0xff00

Test the change with Modbus commands in example Read Relay

.

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

).

2.2.6 Example: Reset Device

RTU Example:

TCP Example:

RTU number 1 0x01

PF4/5 – Bedienungsanleitung

= 16, means address of the 17. Coil (Reset

( Attention! coil number – 1 )

Output value

2

0xff00

0xff00 for setting the selected action

Seite 11

Starting address 2 0x0010

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

Device)

).

2.3 Device Specific Discrete Inputs (read only)

There are no active PF4/5 Discrete Inputs.

PF4/5 – Bedienungsanleitung

Register

Name

Flags

Description

30’001

i

• Serial number of the PF4/5 device (part 1)

30’002

i

• Serial number of the PF4/5 device (part 2)

30’003

Serial Number HC2A

Only if HC2A is used

i

• Serial number of the HC2A-probe (part 1)

30’005

“

• Device name (part 1 – character 1 & 2) e.g. “PF”

30’006

“

• Device name (part 2 – character 3 & 4) e.g. “5 “

30’007

“

• Device name (part 3 – character 5 & 6) e.g. “+ “

30’008

“

• Device name (part 4 – character 7 & 8) e.g. “HC“

30’009

“

• Device name (part 5 – character 9 & 10) e.g. “2 “

30’010

“

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

Shows differential pressure sensor

type

0

PF5: ± 10Pa (*)

1

PF5: ± 25Pa (*)

2

PF5: ± 50Pa (*)

3

PF5: ± 100Pa (*)

4

PF5: ± 250Pa (*)

5

PF5: ± 500Pa (*)

6

PF5: ± 1000Pa (* by order only)

7

PF5: ± 2500Pa (* by order only)

8

PF5: ± 5000Pa (* by order only)

7

PF5: ± 7500Pa (* by order only)

8

PF5: ± 15kPa (* by order only)

11..15

Not used

16

PF4: ± 10Pa (**)

17

PF4: ± 25Pa (**)

18

PF4: ± 50Pa (**)

19

PF4: ± 100Pa (**)

20

PF4: ± 250Pa (**)

21

PF4: ± 500Pa (**)

22…

Not used

30’012

Hardware Version

• Hardware version

30’013

i t

• Production date (part 1)

30’014

i t

• Production date (part 2)

Bit

Shows type of device

0

PFx solo

1

PFx + PT100 Probe

2

PFx + HC2A Probe

3

0

Seite 12

2.4 Device Specific Input Registers (read only)

With Modbus Input Registers you can read some device specific data of the PF4/5 device.

Assisted Modbus command is Read Input Registers (0x04).

2.4.1 Device Data

PF4/5-specific data.

Serial Number

30’004 i

30’011

Probe

Device Name

Differential Pressure Sensor Type

(*) Only for PF5

(**) Only for PF4

• Serial number of the HC2A-probe (part 2)

No.

Production Date

Device Type

30’015

For bit 0 to 2 only one selection is possible

PF4/5 – Bedienungsanleitung

4

PF4/5 (0 = PF4; 1 = PF5)

5

Flow ( 0 = Off; 1 = On)

6…15

0

0 = deactivated; 1 = activated

Shows included communication

interfaces

0

Ethernet

1

0 (Not used)

2

RS485

13…15 0 0 = deactivated; 1 = activated

Bit

Shows state of alarm bits

0

Alarm Differential Pressure Low

1

Alarm Differential Pressure High

2

Alarm Humidity Low (*)

3

Alarm Humidity High (*)

4

Alarm Temperature Low (*)

5

Alarm Temperature High (*)

6

Alarm Calculation Low (*)

7

Alarm Calculation High (*)

8

Alarm Analog Input Low

9

Alarm Analog Input High

10

Alarm Flow Low (**)

11

Alarm Flow High (**)

12

Alarm Volume Low (**)

13

Alarm Volume High (**)

14…15

0

0 = alarm OFF; 1 = alarm ON

Bit

Shows state of pre-alarm bits

0

Pre-Alarm Differential Pressure Low

1

Pre-Alarm Differential Pressure High

2

Pre-Alarm Humidity Low (*)

3

Pre-Alarm Humidity High (*)

4

Pre-Alarm Temperature Low (*)

5

Pre-Alarm Temperature High (*)

6

Pre-Alarm Calculation Low (*)

7

Pre-Alarm Calculation High (*)

8

Pre-Alarm Analog Input Low

9

Pre-Alarm Analog Input High

10

Pre-Alarm Flow Low (**)

11

Pre-Alarm Flow High (**)

12

Pre-Alarm Volume Low (**)

13

Pre-Alarm Volume High (**)

14…15

0

0 = alarm OFF; 1 = alarm ON

Bit

Shows state of other alarm bits

Maximal/minimal sensor limit exceeded

No communication with sensor possible

2

Missing Probe (*)

3

Fix Value(s) is(are) activated

Seite 13

Bit

Interface Type

30’016

30’017

More than one selection is possible

State of Alarms

(*) If HC2A or PT100 probe is connected

(**) If option Flow is selected

More than one active alarm is possible

30’018

30’019

State of Pre-Alarms

(*) If HC2A or PT100 probe is connected

(**) If option Flow is selected

More than one active alarm is possible

State of Other Alarms

(*) If HC2A or PT100 probe is connected. More than one active alarm is possible

0

1

PF4/5 – Bedienungsanleitung

14…15

0

0 = alarm OFF; 1 = alarm ON

Bit

Shows state of relay and valve bits

0

Relay

1…7 0 8

Valve (*)

9…15

0

0 = deactivated; 1 = activated

No.

Shows number of analog outputs

1

1 Analog Output

2

2 Analog Outputs

3

3 Analog Outputs

• Device address

 Device address is the same as RS485 address

Ethernet MAC address, e.g. C8-8E-D1-20-00-2F

• Ethernet MAC address (part 1) (e.g. 0xC88E)

30’024

• Ethernet MAC address (part 2) (e.g. 0xD120)

30’025

• Ethernet MAC address (part 3) (e.g. 0x002F)

Fixed IP Ethernet

used

i

Fixed IP Address, e.g. 192.168.100.101

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

i

DHCP State: On or Off

ON: IP Address will be received from DHCP Server

Off: Fixed IP Address will be used

DHCP IP Ethernet

Address = 0.0.0.0

i

DHCP IP Address, e.g. 192.168.100.151

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

i

• Undefined Gives back Modbus Exception Code 02

Seite 14

State of Relay and Valve

30’020

(*) Only if PF5 device is used

30’021

30’022 Device Address

30’023

Numbers of Analog Outputs

MAC-Address

Only if Ethernet is used

30’026

Address

Only if Ethernet is

30’027

DHCP State

30'028

Only if Ethernet is used

30’029

Address

Only if Ethernet is

30’030

30’031 …

31’000

used and DHCP is ON, otherwise DHCP IP

Reserved

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

 

• DHCP Ethernet IP address (part 2) (e.g. 0x6597)

•

PF4/5 – Bedienungsanleitung

Register

Name

Flags

Description

31’001

f *

• Current humidity value (part 1)

31’002

f *

• Current humidity value (part 2)

31’003

f *

• Current temperature value (part 1)

31’004

f *

• Current temperature value (part 2)

31’005

f *

• Current differential pressure value (part 1)

31’006

f *

• Current differential pressure value (part 2)

31’007

f *

• Current calculation value (part 1)

31’008

f *

• Current calculation value (part 2)

31’009

f *

• Current analog input value (part 1)

31’010

f *

• Current analog input value (part 2)

31’011

f *

• Current flow value (part 1)

31’012

f *

• Current flow value (part 2)

31’013

f *

• Current volume flow value (part 1)

31’014

f *

• Current volume flow value (part 2)

31’015

f *

• Current ambient pressure value (part 1)

31’016

f *

• Current ambient pressure value (part 2)

31’017

f *

• Current internal temperature value (part 1)

31’018

f *

• Current internal temperature value (part 2)

• Undefined

• Gives back Modbus Exception Code 02

Register

Name

Flags

Description

32’001

Humidity

*

• Current humidity value

32’002

Temperature

*

• Current temperature value

32’003

Differential Pressure

*

• Current differential pressure value

32’004

Calculation

*

• Current calculation value

32’005

Analog Input

*

• Current analog input value

32’006

Flow

*

• Current flow value

32’007

Internal Temperature

*

• Current volume flow value

32’008

Ambient Pressure

*

• Current ambient pressure value

Seite 15

2.4.2 Current Values: Float Values

Current values in 32-bit IEEE754 float format of all PF4/5 sensors.

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

registers in one Modbus command.

Humidity

Temperature

Differential Pressure

Calculation

Analog Input

Flow

Volume Flow

Ambient Pressure

Internal Temperature

31’019 …

31’999

Reserved

2.4.3 Current Values: Integer Values

Current values in 16-bit integer format of all PF4/5 sensors, updated every measurement cycle.

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

Value Scaling).

Integer

PF4/5 – Bedienungsanleitung

32’009

Internal Temperature

*

• Current internal temperature value

• 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

Device Specific Settings and Selectable Swap Modes for Rotronic Devices)

t

Represents the Unix Time (UTC) since 1.1.1970 in seconds

“

Character values separated in succeeding registers. 2 characters per register

These are float-values (32-bit IEEE754), separated in two succeeding registers (16-bits).

Devices)

The showed values depend also of the selected unit (see Value Unit)

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

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)

Modbus RTU Address (see Device Descriptions)

Function code

1

0x04

Read Discret Inputs

Starting address

2

0x7918

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

Quantity of input

registers

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

0x41f370a

3

0x41ba000

0

0x3d80e9a

2

Seite 16

32’010 …

39’999

Reserved

2.4.4 Explanation of Flags

i

f

*

and part 2 of the 32-bit value, depends on the Swap Mode of the Modbus communication (see

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 Specific Settings and

Selectable Swap Modes for Rotronic

2.4.5 Example: Read Input Register

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

RTU Example:

TCP Example:

(see Current Values:

RTU number 1 0x01

2 0x0006 = 6, means read 6 registers

Byte count 1 0x0c

Input registers

2 * N

Float Values)

= 30.43 %rh Humidity

= 23.25 °C Temperature

= 0.063 Pa Differential Pressure

PF4/5 – Bedienungsanleitung

Seite 17

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

).

PF4/5 – Bedienungsanleitung

Register

Name

Flags

Description

No.

Select Calculation

0

Dew Point

1

Frost Point

2

Wet Bulb Temperature

3

Enthalpy

4

Vapour Concentration

5

Specific Humidity

6

Mixing Ratio

Saturation Vapour Concentration

8

Vapour Partial Pressure

9

Vapour Saturation Pressure

No.

Shows the analog input type

0

Voltage (0 ... 10V)

1

Current (0 ... 24mA)

• Undefined Gives back Modbus Exception Code 02

Seite 18

2.5 Device Specific Holding Registers

Via the Modbus Holding Registers you can read and write device specific data to the PF4/5.

Assisted Modbus commands are Read Holding Registers (0x03), Write Single Register (0x06) and Write Multiple Registers (0x10).

Attention!

Changes to register content in the PF4/5 can change the functionality of the PF4/5. This may cause the PF4/5 to become inoperable.

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

Notes!

Most of the Specific Holding Registers cannot be validated, if Modbus command Write Multiple Register is used.

Changing values in the Holding Registers needs normally a restart of the device (see Device

Actions).

Changing values in the Holding Registers will always change the FDA settings of the internal device data except, changing the reference value registers of the Reference Value Settings.

2.5.1 Value Type

Selection of the possible calculation and analog input modes.

Calculation Type

40’001

40’002 Analog Input Type

40’003 …

40’099

Only if HC2A is used

Reserved

7

•

PF4/5 – Bedienungsanleitung

Register

Name

Flags

Description

Shows selectable

temperature units

0

°C 1 °F

Shows selectable

differential pressure units

0

Pa 1 inH2O

2

mpsi

3

mbar

4

mmHg

5

mmH2O

6

Torr 7 g/cm2

Shows selectable ambient

pressure units

0

hPa 1 inHg

2

psi

Shows selectable enthalpy

units

0

kJ/kg

1

BTI/lb

Shows selectable volume

units

0

g/m3

1

g/ft3

Shows selectable weight

units

0

g/kg

1

gr/lb

No.

Shows selectable flow units

0

m/s 1 km/h

2

ft/s 3 mph

Shows selectable volume

flow units

0

m3/h

1

m3/min

0

l/min

3

l/s 4 cfm 5 cfs

Seite 19

2.5.2 Value Unit

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

Temperature

41’001

For Calculation:

Dew Point, Frost Point, Wet Bulb Temperature

41’002 Differential Pressure

Ambient Pressure

41’003

For Calculation:

Vapour Partial Pressure Vapour Saturation Pressure

For Calculation only:

41’004

Enthalpy

Only if HC2A is used

No.

41’005

41’006

41’007

41’008

For Calculation only: Vapour Concentration Volume

Only if HC2A is used

For Calculation only: Vapour Concentration Weight

Only if HC2A is used

Flow

Only if Flow is activated

Volume Flow

Only if Flow is activated

No.

PF4/5 – Bedienungsanleitung

Shows selectable volume

flow units

0

cm2 1 m2 2 in2 3 ft2

• Characters 1 & 2 of the unit of

Humidity

• Characters 3 & 4 of the unit of

Humidity

41’012

“ !

• Characters 5 of the unit of Humidity

Customer selectable unit for Humidity (maximal 5 characters). If there are only

space characters in these registers, the unit for Humidity will be ʺ%rhʺ

• Characters 1 & 2 of the unit of the

analog input

• Characters 3 & 4 of the unit of the

analog input

 Customer selectable unit for Analog Input (maximal 4 characters). If there are

set (see Analog Input Settings).

• Undefined

02

Register

Name

Flags

Description

Humidity

Only if HC2A is used

Temperature

used

• Scaling factor for the differential

pressure value

Calculation

Only if HC2A is used

42’005

Analog Input

• Scaling factor for the analog input value

Flow

Only if Flow is activated

Volume Flow

Only if Flow is activated

• Scaling factor for the ambient pressure

value

• Scaling factor for the internal

temperature value

41’010 …

41’099

Seite 20

No.

Duct Area

41’009

Only if Flow is activated

41’010

Humidity Unit String

41’011 “ !

41’013

41’014 “ !

41’015 …

41’099

Only if HC2A is used



Analog Input Unit String

only space characters in these registers, the unit for Analog Input will be ʺVʺ, resp. ʺmAʺ, depending on the value of Analog Input Type (see

Analog Input Settings). be ʺVʺ, resp. ʺmAʺ will only be showed if Auto Unit bit is

Reserved

“ !

Value Type or

• Gives back Modbus Exception Code

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.

42’001

42’002

42’003 Differential Pressure

42’004

42’006

42’007

42’008 Ambient Pressure

42’009 Internal Temperature

Only if HC2A or Pt100 is

Reserved

• Scaling factor for the humidity value

• Scaling factor for the temperature value

• Scaling factor for the calculation value

• Scaling factor for the flow value

• Scaling factor for the volume flow value

• Undefined

PF4/5 – Bedienungsanleitung

• Gives back Modbus Exception Code 02

Register

Name

Flags

Description

44’001

? f !

• Reference value humidity (part 1)

44’002

? f !

• Reference value humidity (part 2)

44’003

Temperature

used

? f !

• Reference value temperature (part 1)

• Reference value differential pressure

(part 1)

• Reference value differential pressure

(part 2)

• Undefined

• Gives back Modbus Exception Code 02

Register

Name

Flags

Description

Bit

Shows device bits

0

Trend Enable (OFF/ON)

1…15

Reserved

Value

Shows the selected Filter Type

0…10

Moving Average Filter

100… 110

Shows value for device

protection

171

Device Write Protection ON

x

Device Write Protection OFF

 After writing this command with Device Write Protection ON (171), it’s not

writing to memory was not possible

Seite 21

2.5.4 Reference Value Settings

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

Actions).

Note!

Values in these registers are only valid until the next restart of the device.

Humidity

Only if HC2A is used

Sensor

44’004 ? f !

44’005

44’006 ? f !

44’007 …

44’099

Only if HC2A or Pt100 is

Differential Pressure

Reserved

2.5.5 Device Specific Settings

Device specific settings.

44’101 Device Bits

44’102

Differential Pressure Filter and Filter Type

• Reference value temperature (part 2)

? f !

Filter value for the Differential Pressure

Smoothing Exponential Filter

No.

44’103

Memory Write Protection

possible to overwrite the content of the memory until executing the same command with Device Write Protection OFF

 Be careful to use this command over Modbus! If writing Modbus

commands to a device with Device Write Protection ON, you don’t get an error back, because the Modbus writing process was successful - only

PF4/5 – Bedienungsanleitung

• Menu protection (On/Off)

 If On, the menu of the device can only

using the keys

44’105

Menu Code

• Menu Code (0…9999)

No.

Shows selectable calculation

0

Dew Point

1

Frost Point

2

Wet Bulb Temperature

3

Enthalpy

4

Vapour Concentration

5

Specific Humidity

6

Mixing Ratio

Saturation Vapour Concentration

8

Vapour Partial Pressure

9

Vapour Saturation Pressure

 The same value as in Value Type -> Calculation Type

• Device number (RS485 address) (0…63)

 The device number (RS485 address) is

changing this value

No.

Shows Modbus operation mode

0

Modbus Word Swap

1

Modbus Byte Swap

2

Modbus Byte Word Swap

3

Modbus No Change

 See Selectable Swap Modes for Rotronic Devices

i !

DHCP Server: On or Off

 ON: IP Address will be received from

DHCP Server

 Off: Fixed IP Address will be used

i !

Fixed IP Address, e.g. 192.168.100.101

• Ethernet IP address (part 1) (e.g.

0xC0A8)

i !

• Ethernet IP address (part 2) (e.g.

0x6465)

 Communication is normally lost, changing fixed IP address and DHCP is Off

44’112

Zero Adjust Repetition

Only if PF5 is active

i !

• Zero adjust repetition time (part 1)

i !

 Repeat time for the automatic zero point adjustment of differential

 Attention! If 0, the repetition time is infinite

• Undefined

• Gives back Modbus Exception Code 02

Seite 22

44’104 Menu Protection

44’106

44’107 Device Number

Calculation Select

be activated by entering a correct code,

7

used in conjunction with a RS485 network

 Each network address should be unique  Valid addresses are (0 Broadcast) 1…63

 Communication is normally lost,

44’108 Modbus Operation Mode

44’109

44’110

DHCP Server (On or Off)

Only if Ethernet is used

Fixed IP Ethernet Address

Only if Ethernet is used

44’111

44’113

44’114 …

44’199

Time

pressure (in minutes)

Reserved

• Zero adjust repetition time (part 2)

PF4/5 – Bedienungsanleitung

Register

Name

Flags

Description

44’201

“ !

• 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)

• Desc. diff. pressure sensor (part 1 – char.

1 & 2)

• Desc. diff. pressure sensor (part 2 – char.

3 & 4)

• Desc. diff. pressure sensor (part 3 – char.

5 & 6)

• Desc. diff. pressure sensor (part 4 – char.

7 & 8)

• Desc. diff. pressure sensor (part 5 – char.

9 & 10)

• Desc. diff. pressure sensor (part 6 – char.

11 & 12)

44’213

“ !

• 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)

• Description relay 1 (part 6 – char. 11 &

12)

• Description PF4/5 probe (part 1 – char. 1

& 2)

• Description PF4/5 probe (part 2 – char. 3

& 4)

• Description PF4/5 probe (part 3 – char. 5

& 6)

• Description PF4/5 probe (part 4 – char. 7

& 8)

• Description PF4/5 probe (part 5 – char. 9

& 10)

44’224

“ !

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

• Description analog input 1 (part 1 – char.

1 & 2)

• Description analog input 1 (part 2 – char.

3 & 4)

• Description analog input 1 (part 3 – char.

5 & 6)

• Description analog input 1 (part 4 – char.

7 & 8)

Seite 23

2.5.6 Device Descriptions

Name for the different parts of the device, which is clearly related with its function.

Device

44’207

44’208 “ !

44’209 “ !

Differential Pressure

44’210 “ !

44’211 “ !

44’212 “ !

Relay

44’218 “ !

44’219

44’220 “ !

“ !

44’221 “ !

44’222 “ !

44’223 “ !

44’225

44’226 “ !

44’227 “ !

44’228 “ !

HC2A Probe

Only if HC2A is used

Analog Input

“ !

PF4/5 – Bedienungsanleitung

• Description analog input 1 (part 5 – char.

9 & 10)

• Description analog input 1 (part 6 – char.

11 & 12)

• Description ambient pressure (part 1 –

char. 1 & 2)

• Description ambient pressure (part 2 –

char. 3 & 4)

• Description ambient pressure (part 3 –

char. 5 & 6)

• Description ambient pressure (part 4 –

char. 7 & 8)

• Description ambient pressure (part 5 –

char. 9 & 10)

Description ambient pressure (part 6 –

char. 11 & 12)

44’237

“ !

• Description flow (part 1 – char. 1 & 2)

44’238

“ !

• Description flow (part 2 – char. 3 & 4)

44’239

“ !

• Description flow (part 3 – char. 5 & 6)

44’240

“ !

• Description flow (part 4 – char. 7 & 8)

44’241

“ !

• Description flow (part 5 – char. 9 & 10)

44’242

“ !

• Description flow (part 6 – char. 11 & 12)

• Description volume flow (part 1 – char. 1

& 2)

• Description volume flow (part 2 – char. 3

& 4)

• Description volume flow (part 3 – char. 5

& 6)

• Description volume flow (part 4 – char. 7

& 8)

• Description volume flow (part 5 – char. 9

& 10)

• Description volume flow (part 6 – char. 11

& 12)

44’249

“ !

• Description Pt100 (part 1 – char. 1 & 2)

44’250

“ !

• Description Pt100 (part 2 – char. 3 & 4)

44’251

“ !

• Description Pt100 (part 3 – char. 5 & 6)

44’252

“ !

• Description Pt100 (part 4 – char. 7 & 8)

44’253

“ !

• Description Pt100 (part 5 – char. 9 & 10)

44’254

“ !

• Description Pt100 (part 6 – char. 11 & 12)

Undefined Gives back Modbus Exception Code 02

Seite 24

44’229 “ !

44’230 “ !

44’231

44’232 “ !

44’233 “ !

Ambient Pressure

44’234 “ !

44’235 “ !

44’236 “ !

Flow

Only if Flow is

activated

44’243

44’244 “ !

44’245 “ !

44’246 “ !

Volume Flow

Only if Flow is

activated

“ !

•

44’247 “ !

44’248 “ !

Pt100

Only if Pt100 is used

44’255 …

44’399

Reserved

•

PF4/5 – Bedienungsanleitung

Register

Name

Flags

Description

Bit

Shows the fix value bits

0

Differential Pressure

1

Humidity (Only if HC2A is used)

Temperature (Only if HC2A or

Pt100 is used)

3

Calculation (Only if HC2A is used)

4

Analog Input

5

Ambient Pressure

6

Flow (Only if Flow is activated)

Volume Flow (Only if Flow is

activated)

8…1

5

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

44’402

f !

• Fix value differential pressure (part 1)

44’403

f !

• Fix value differential pressure (part 2)

44’404

f !

• Fix value humidity (part 1)

44’405

f !

• Fix value humidity (part 2)

44’406

Temperature

used

f !

• Fix value temperature (part 1)

44’408

f !

• Fix value calculation (part 1)

44’409

f !

• Fix value calculation (part 2)

44’410

f !

• Fix value analog Input (part 1)

44’411

f !

• Fix value analog Input (part 2)

44’412

f !

• Fix value ambient pressure (part 1)

44’413

f !

• Fix value ambient pressure (part 2)

44’414

f !

• Fix value flow (part 1)

44’415

f !

• Fix value flow (part 2)

44’416

f !

• Fix value volume flow (part 1)

44’417

f !

• Fix value volume flow (part 2)

44’418 …

44’499

• Undefined

• Gives back Modbus Exception Code 02

Seite 25

2.5.7 Fix Value Settings

Fixed values are used to simulate a measuring value for testing purposes. To activate Fix Values, you have to set the corresponding Fix Value Bits to ON.

Note!

The selected fixed values should be in valid ranges. Valid ranges depends on selected measuring value and selected unit.

2

44’401 Fix Value Bits !

Differential Pressure

Humidity

Only if HC2A is used

44’407 f !

Only if HC2A or Pt100 is

Calculation

Only if HC2A is used

Analog Input

Ambient Pressure

Flow

Only if Flow is activated

Volume Flow

Only if Flow is activated

7

Reserved

• Fix value temperature (part 2)

Reserved

PF4/5 – Bedienungsanleitung

Register

Name

Flags

Description

Shows selected source for

PF4/5 solo

0

Unused

1

Differential Pressure

2

Not valid! Don't use!

3

Not valid! Don't use!

4

Not valid! Don't use!

5

Analog Input

6

Ambient Pressure

Flow (Use only if Flow is

activated)

Volume Flow (Use only if Flow is

activated)

Shows selected source for

PF4/5 + HC2A

0

Unused

1

Differential Pressure

2

HC2A Humidity

3

HC2A Temperature

4

HC2A Calculation

5

Analog Input

6

Ambient Pressure

Flow (Use only if Flow is

activated)

Volume Flow (Use only if Flow is

activated)

Shows selected source for

PF4/5 + Pt100

0

Unused

1

Differential Pressure

2

Not valid! Don't use!

3

Pt100 Temperature

4

Not valid! Don't use!

5

Analog Input

6

Ambient Pressure

Flow (Use only if Flow is

activated)

Volume Flow (Use only if Flow is

activated)

No.

Shows selected output range

0

Output Range 0…1V

1

Output Range 0…5V

Seite 26

2.5.8 Analog Output Settings

The PF4/5 can provide up to three analog output signals. The measured sensor values can be spent individually on every analog output.

No.

44’501

Source for Analog

Output 1

(Depends on device

type)

7

8

No.

7

8

No.

44’502

Output Range Analog

Output 1

7

8

PF4/5 – Bedienungsanleitung

2

Output Range 0…10V

3

Output Range 0…20mA

4

Output Range 4…20mA

44’503

f !

• Customer selectable scale low 1 (part 1)

44’504

f !

• Customer selectable scale low 1 (part 2)

• Customer selectable scale high 1 (part

1)

• Customer selectable scale high 1 (part

2)

 Example see below

Source for Analog

type)

No.

Shows selected source

-

Same as for Analog Output 1

No.

Shows selected output range

-

Same as for Analog Output 1

44’509

f !

• Customer selectable scale low 2 (part 1)

44’510

f !

• Customer selectable scale low 2 (part 2)

• Customer selectable scale high 2 (part

1)

• Customer selectable scale high 2 (part

2)

 Example see below

Source for Analog

type)

No.

Shows select source

-

Same as for Analog Output 1

No.

Shows selected output range

-

Same as for Analog Output 1

44’515

f !

• Customer selectable scale low 3 (part 1)

44’516

f !

• Customer selectable scale low 3 (part 2)

• Customer selectable scale high 3 (part

1)

• Customer selectable scale high 3 (part

2)

Example see below

Analog Output 1 Current

Load

Analog Output 2 Current

Load

Analog Output 3 Current

Load

 Load Resistor are only for Output Range 0…20mA / 4…20mA for

compensation

44’522 …

44’599

• Undefined

• Gives back Modbus Exception Code 02

Seite 27

Processing Scale Low 1

44’505

Processing Scale High 1

44’506 f !

44’507

44’508

44’511

44’512 f !

44’513

44’514

Output 2

(Depends on device

Output Range Analog

Output 2

Processing Scale Low 2

Processing Scale High 2

Output 3

(Depends on device

Output Range Analog

Output 3

f !

(!)

f !

Processing Scale Low 2

44’517

Processing Scale High 2

44’518 f !

f !



44’519

44’520

44’521

Reserved

• Load Resistor for DAC1 (0 … 500 Ω)

• Load Resistor for DAC2 (0 … 500 Ω)

• Load Resistor for DAC3 (0 … 500 Ω)

Description of the analog output

The output range of the measured sensor Source can be scaled to the processing area (Scale Low and Scale High).

The output range of the analog outputs depends of the selected Output Stage and cannot be changed.

PF4/5 – Bedienungsanleitung

Seite 28

The Scale Low value will be projected to Range Low value and the Scale High value to Range High value of the selected Output Range (0…1V, 0…5V, 0…10V, 0…20mA, 4…20mA).

It applies: Scale High must be greater than Scale Low

Scale Low and Scale High should not exceed the range of ±100'000'000.0

Example:

Calculation of the resulting value (Output Value):

(

  =

  −  )∗(   −  

(  −  )

)

+  

PF4/5 – Bedienungsanleitung

Register

Name

Flags

Description

44’601

Display Bits

• Not yet used, undefined

Shows selected source for

PF4/5 + solo

0

No value displayed

1

Differential Pressure

2

Not valid! Don't use!

3

Not valid! Don't use!

4

Not valid! Don't use!

5

Analog Input

6

Ambient Pressure

Flow (Use only if Flow is

activated)

Volume Flow (Use only if Flow is

activated)

Shows selected source for

PF4/5 + HC2A

0

No value displayed

1

Differential Pressure

2

HC2A Humidity

3

HC2A Temperature

4

HC2A Calculation

5

Analog Input

6

Ambient Pressure

Flow (Use only if Flow is

activated)

Volume Flow (Use only if Flow is

activated)

Shows selected source for

PF4/5 + Pt100

0

No value displayed

1

Differential Pressure

2

Not valid! Don't use!

3

Pt100 Temperature

4

Not valid! Don't use!

5

Analog Input

6

Ambient Pressure

Flow (Use only if Flow is

activated)

Volume Flow (Use only if Flow is

activated)

Display Row 2

type)

No.

Shows selected source

-

Same as for Display Row 1

Seite 29

2.5.9 Display Settings

Adjustments to the PF4/5 display concerning appearance and content can be configured.

No.

44’602

Display Row 1

(Depends on device type)

7

8

No.

7

8

No.

44’603

(Depends on device

7

8

PF4/5 – Bedienungsanleitung

Display Row 3

type)

No.

Shows selected source

-

Same as for Display Row 1

Shows selected source for

PF4/5 + solo

0

No value displayed

1

Differential Pressure

2

Not valid! Don't use!

3

Not valid! Don't use!

4

Not valid! Don't use!

5

Analog Input

6

Ambient Pressure

Flow (Use only if Flow is

activated)

Volume Flow (Use only if Flow is

activated)

Flow Duct Area (Use only if Flow

is activated)

Shows selected source for

PF4/5 + HC2A

0

No value displayed

1

Differential Pressure

2

HC2A Humidity

3

HC2A Temperature

4

HC2A Calculation

5

Analog Input

6

Ambient Pressure

7

Flow (Only if Flow is activated)

Volume Flow (Only if Flow is

activated)

Flow Duct Area (Only if Flow is

activated)

Shows selected source for

PF4/5 + Pt100

0

No value displayed

1

Differential Pressure

2

Not valid! Don't use!

3

Pt100 Temperature

4

Not valid! Don't use!

5

Analog Input

6

Ambient Pressure

7

Flow (Only if Flow is activated)

Volume Flow (Only if Flow is

activated)

Flow Duct Area (Only if Flow is activated)

44’606

Pixel Color

! E

• Color for pixel

44’607

Pixel Color Alarm

! E

• Color for alarm

44’608

Pixel Color Pre-Alarm

! E

• Color for pre-alarm

44’609

Pixel Color Background

! E

• Color for background

Seite 30

44’604

(Depends on device

No.

7

8

9

No.

44’605

Display Row 4

(Depends on device type)

8

9

No.

8

9

PF4/5 – Bedienungsanleitung

No.

Shows select display brightness

0

Display brightness 20%

1

Display brightness 30%

2

Display brightness 40%

3

Display brightness 50%

4

Display brightness 60%

5

Display brightness 70%

6

Display brightness 80%

7

Display brightness 90%

8

Display brightness 100%

44’611 …

44’699

• Undefined

• Gives back Modbus Exception Code 02

Register

Name

Flags

Description

Shows selected source for

PF4/5 + solo

0

Differential Pressure

1

Not valid! Don't use!

2

Not valid! Don't use!

3

Not valid! Don't use!

4

Analog Input

Flow (Use only if Flow is

activated)

Volume Flow (Use only if

Flow is activated)

Shows selected source for

PF4/5 + HC2A

0

Differential Pressure

1

HC2A Humidity

2

HC2A Temperature

3

HC2A Calculation

4

Analog Input

Flow (Use only if Flow is

activated)

Volume Flow (Use only if

Flow is activated)

Seite 31

44’610 Display Brightness

Reserved

2.5.10 Alarm Settings

For most sensors, it is possible to set alarm values for a Low and High level with Hysteresis and pre-alarms values to Low and High level.

Values of the selected sensor, which are located below the low alarm or above the high alarm (or pre-alarm), trigger an alarm (or pre-alarm). The value specified for the alarm function Hysteresis is used for both the Low and the High alarm. Hysteresis is not used for pre-alarm.

To activate the alarm, you have to set the corresponding Alarm Bit to ON.

Note!

Be sure to select alarm values inside the operating range of the sensors. Valid ranges depends on selected measuring value and selected unit.

No.

5

44’701

Alarm Bits

(Depends on device type)

f !

6

No.

5

6

PF4/5 – Bedienungsanleitung

Shows selected source for

PF4/5 + Pt100

0

Differential Pressure

1

Not valid! Don't use!

2

Pt100 Temperature

3

Not valid! Don't use!

4

Analog Input

Flow (Use only if Flow is

activated)

Volume Flow (Use only if

Flow is activated)

Value is ON

• Alarm value differential pressure

low (part 1)

• Alarm value differential pressure

low (part 2)

• Alarm value differential pressure

high (part 1)

• Alarm value differential pressure

high (part 2)

• Alarm value differential pressure

hysteresis (part 1)

• Alarm value differential pressure

hysteresis (part 2)

• Pre-alarm value differential

pressure low (part 1)

• Pre-alarm value differential

pressure low (part 2)

• Pre-alarm value differential

pressure high (part 1)

• Pre-alarm value differential

pressure high (part 2)

44’712

f !

• Alarm value humidity low (part 1)

44’713

f !

• Alarm value humidity low (part 2)

44’714

f !

• Alarm value humidity high (part 1)

44’715

f !

• Alarm value humidity high (part 2)

• Alarm value humidity hysteresis

(part 1)

• Alarm value humidity hysteresis

(part 2)

• Pre-alarm value humidity low

(part 1)

• Pre-alarm value humidity low

(part 2)

• Pre-alarm value humidity high

(part 1)

• Pre-alarm value humidity high

(part 2)

• Alarm value temperature low (part

1)

Seite 32

No.

5

6

0 = Alarm Value is OFF, 1 = Alarm

44’702

Differential Pressure Low

44’703 f !

44’704

Differential Pressure High

44’705 f !

44’706

44’707 f !

44’708

44’709 f !

44’710

44’711 f !

Differential Pressure Hysteresis

Differential Pressure PreAlarm Low

Differential Pressure PreAlarm High

Humidity Low

Use only if HC2A is used

Humidity High

Use only if HC2A is used

f !

44’716

44’717 f !

44’718

44’719 f !

44’720

44’721 f !

44’722 Temperature Low f !

Humidity Hysteresis

Use only if HC2A is used

Humidity Pre-Alarm Low

Use only if HC2A is used

Humidity Pre-Alarm High

Use only if HC2A is used

f !

PF4/5 – Bedienungsanleitung

Use only if HC2A or Pt100

• Alarm value temperature low

(part 2)

• Alarm value temperature high

(part 1)

• Alarm value temperature high

(part 2)

• Alarm value temperature

hysteresis (part 1)

• Alarm value temperature

hysteresis (part 2)

• Pre-alarm value temperature low

(part 1)

• Pre-alarm value temperature low

(part 2)

Pre-alarm value temperature high

(part 1)

• Pre-alarm value temperature high

(part 2)

• Alarm value calculation low

(part 1)

• Alarm value calculation low

(part 2)

• Alarm value calculation high

(part 1)

• Alarm value calculation high

(part 2)

• Alarm value calculation hysteresis

(part 1)

• Alarm value calculation hysteresis

(part 2)

• Pre-alarm value calculation low

(part 1)

Pre-alarm value calculation low

(part 2)

• Pre-alarm value calculation high

(part 1)

• Pre-alarm value calculation high

(part 2)

• Alarm value analog input low

(part 1)

• Alarm value analog input low

(part 2)

• Alarm value analog input high

(part 1)

• Alarm value analog input high

(part 2)

• Alarm value analog input

hysteresis (part 1)

• Alarm value analog input

hysteresis (part 2)

• Pre-alarm value analog input low

(part 1)

Seite 33

44’723

44’724

44’725 f !

44’726

44’727 f !

44’728

44’729 f !

44’730

44’731 f !

44’732

44’733 f !

44’734

44’735 f !

is used

Temperature High

Use only if HC2A or Pt100 is used

Temperature Hysteresis

Use only if HC2A or Pt100 is used

Temperature Pre-Alarm Low

Use only if HC2A or Pt100 is used

Temperature Pre-Alarm High

Use only if HC2A or Pt100 is used

Calculation Low

Use only if HC2A is used

Calculation High

Use only if HC2A is used

f !

•

44’736

44’737 f !

44’738

44’739 f !

44’740

44’741 f !

44’742

44’743 f !

44’744

44’745 f !

44’746

44’747 f !

Calculation Hysteresis

Use only if HC2A is used

Calculation Pre-Alarm Low

Use only if HC2A is used

Calculation Pre-Alarm High

Use only if HC2A is used

Analog Input Low

Analog Input High

Analog Input Hysteresis

f !

•

44’748 Analog Input Pre-Alarm Low f !

PF4/5 – Bedienungsanleitung

• Pre-alarm value analog input low

(part 2)

• Pre-alarm value analog input high

(part 1)

• Pre-alarm value analog input high

(part 2)

44’752

f !

• Alarm value flow low (part 1)

44’753

f !

• Alarm value flow low (part 2)

44’754

f !

• Alarm value flow high (part 1)

44’755

f !

• Alarm value flow high (part 2)

• Alarm value flow hysteresis

(part 1)

• Alarm value flow hysteresis

(part 2)

44’758

f !

• Pre-alarm value flow low (part 1)

44’759

f !

• Pre-alarm value flow low (part 2)

44’760

f !

• Pre-alarm value flow high (part 1)

44’761

f !

• Pre-alarm value flow high (part 2)

Alarm value volume flow low

(part 1)

• Alarm value volume flow low

(part 2)

• Alarm value volume flow high

(part 1)

• Alarm value volume flow high

(part 2)

• Alarm value volume flow

hysteresis (part 1)

• Alarm value volume flow

hysteresis (part 2)

• Pre-alarm value volume flow low

(part 1)

• Pre-alarm value volume flow low

(part 2)

• Pre-alarm value volume flow high

(part 1)

• Pre-alarm value volume flow high

(part 2)

44’772 …

44’799

• Undefined

Gives back Modbus Exception Code 02

Seite 34

44’749 f !

44’750

44’751 f !

44’756

44’757 f !

44’762

44’763 f !

44’764

44’765 f !

Analog Input Pre-Alarm High

Flow Low

Use only if Flow is activated

Flow High

Use only if Flow is activated

Flow Hysteresis

Use only if Flow is activated

Flow Pre-Alarm Low

Use only if Flow is activated

Flow Pre-Alarm High

Use only if Flow is activated

Volume Flow Low

Use only if Flow is activated

Volume Flow High

Use only if Flow is activated

f !

•

44’766

44’767 f !

44’768

44’769 f !

44’770

44’771 f !

Volume Flow Hysteresis

Use only if Flow is activated

Volume Flow Pre-Alarm Low

Use only if Flow is activated

Volume Flow Pre-Alarm High

Use only if Flow is activated

Reserved

f !

•

PF4/5 – Bedienungsanleitung

Register

Name

Flags

Description

No.

Shows selected alarm level

Off (No differential pressure alarm)

Low (Differential Pressure Low alarm)

High (Differential Pressure High alarm)

3

Low or High

No.

Shows selected alarm level

Same as for Alarm Level Differential Pressure

No.

Shows selected alarm level

Same as for Alarm Level Differential Pressure

No.

Shows selected alarm level

Same as for Alarm Level Differential Pressure

No.

Shows selected alarm level

Same as for Alarm Level Differential Pressure

No.

Shows selected alarm level

Same as for Alarm Level Differential Pressure

No.

Shows selected alarm level

Same as for Alarm Level Differential Pressure

Shows selected alarm Off

sequence

Alarm never ends!

The relay stays energized

manually

Off when alarm ends

The relay will be de-energized

condition ends

Off after Timeout

 The relay will remain

energized for the specified

Seite 35

2.5.11 Relay Settings

Setting of relays for all sensors.

Note!

In order to make use of the PF4/5 relay output, you must first enable the Alarm Bits and set the corresponding Alarm Levels (low and high) for each sensor that you want to monitor (see

Alarm Settings).

Be aware that more than one Alarm Source can activate the relay

0

44’801

44’802

44’803

44’804

44’805

44’806

44’807

Alarm Level Differential Pressure

Alarm Level Humidity

Use only if HC2A is used

Alarm Level Temperature

Use only if HC2A or Pt100 is used

Alarm Level Calculation

Use only if HC2A is used

Alarm Level Analog Input

Alarm Level Flow

Use only if Flow is activated

Alarm Level Volume Flow

Use only if Flow is activated

1

2

-

44’808

Alarm Off

No.



0

1

until it will be de-energized



as soon as the alarm

2

PF4/5 – Bedienungsanleitung

duration (Timeout) even if the alarm condition has ended

Off after alarm ends or after Timeout

44’809

On Delay

!

• On delay time for relay (0 … 65536 [s])

If alarm condition occurs, the relay will be energized after specified OnDelay

time

• Maximal alarm time for relay (0 …

65536 [s])

 Time in seconds between the occurrence of the trigger criterion and the de-

chosen

• If ON: It’s possible to mute the alarm

for Mute Time

44’812

Mute Time

!

• Mute time (0 … 65536 [s])

 Time in seconds the relay will be muted before the alarm went on again (if

alarm is still active)

44’813…

44’899

Undefined

• Gives back Modbus Exception Code 02

Seite 36

3



44’810 Alarm Time !

44’811 Mute On/Off

energizing of the relay. This timeout will be active when Off after Timeout is

Reserved

•

PF4/5 – Bedienungsanleitung

Flag

s

Bit

Description of the Analog Input bits

Auto Unit

 See below

1…1

5

No.

Select Analog Input Source

0

Voltage (0 … 10V)

1

Current (0 … 24mA)

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

• Customer selectable input range (low level)

(part 1)

• Customer selectable input range (low level)

(part 2)

• Customer selectable input range (high level)

(part 1)

• Customer selectable input range (high level)

(part 2)

• Customer selectable proc. range scale low

(part 1)

• Customer selectable proc. range scale low

(part 2)

• Customer selectable proc. range scale high

(part 1)

• Customer selectable proc. range scale high

(part 2)

 Example see below

44’911 …

44’999

• Undefined

• Gives back Modbus Exception Code 02

Analog Input

ect

Voltage

Current

Auto Unit

“V”

“mA”

Seite 37

2.5.12 Analog Input Settings

The input range of the analog input covers 0 to 10.0 [V] resp. 0 to 24.0 [mA], depending on Analog Input Type.

Register Name

44’901 Analog Input Bits

44’902

44’903

44’904 f !

44’905

44’906 f !

44’907

44’908 f !

Analog Input Type

Input Range Low

Input Range High

Processing Range Scale Low

Description

0

Reserved

f !

44’909

44’910 f !

Processing Range Scale High

Reserved

f !

Auto Unit: Off the text in the field Unit: Analog Input String in the section Value Unit

will be showed.

Auto Unit: On if the field Unit: Analog Input String in the section Value Unit is empty, the following

automatic unit string will be used:

Sel

If the field Unit: Analog Input String in the section Value Unit

is not empty, e.g. set to “ppm”, the

unit in the field Unit: Analog Input String will be used, in this case “ppm”.

Description of the analog input

PF4/5 – Bedienungsanleitung

Seite 38

The input range of the analog input covers 0.0 [V] to 10.0 [V] resp. 0.0 [mA] to 24.0 [mA], depending on

Analog

Input Type.

The input range (Range Low / High) of the analog input can be scaled to a processing area (Scale Low /

High).

Note!

Range High must be greater than Range Low and Scale High must be greater or equal

Scale Low.

Don’t exceed the selected maximal and minimal limits of the input range.

PF4/5 – Bedienungsanleitung

Seite 39

Examples:

Calculation of the resulting value (Displayed Value):

(

  =

  −  )∗(   −  

(  −  )

)

+  

PF4/5 – Bedienungsanleitung

Register

Name

Flags

Description

Bit

Description of the Flow bits

OFF – Flow measurement is OFF

ON – Flow measurement is ON

1…1

5

45’002

f !

• Customer selectable flow area (part 1)

45'003

f !

• Customer selectable flow area (part 2)

45’004

f !

• Customer selectable flow KL factor (part 1)

45’005

f !

• Customer selectable flow KL factor (part 2)

45’006 …

45’099

• Undefined

Gives back Modbus Exception Code 02

Seite 40

2.5.13 Flow Settings

Setting of flow specific values.

45’001 Flow Bits

0

Reserved

Duct Area

Only if Flow is activated

KL Factor

Only if Flow is activated

Reserved

•

Duct Area: Channel area for the calculation of the volume flow. Unit is defined in Value Unit

KL Factor: Actual KL factor for the calculation of the volume flow

PF4/5 – Bedienungsanleitung

“

Character values separated in succeeding registers. 2 characters per register

?

After restart 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).

Devices)

Attention!

Register is used

These are 32-bit values, separated in two succeeding registers (16-bits). How to bring together part 1

Selectable Swap Modes for Rotronic Devices)

e.g. Red

Transmit

01 03 ae 39 00 04 b4 ec

Receive

01 03 08 00 01 00 02 00 03 00 06 8c d5

Transmit

MBAP 01 03 ae 39 00 04

Receive

MBAP 01 03 08 00 01 00 02 00 03 00 06

Field

Bytes

Value

Description

MBAP

7

MBAP

MBAP header (see Modbus RTU / TCP)

Checksum

2

CRC

CRC Checksum (see Modbus RTU / TCP)

Modbus RTU Address (see Device Specific

Settings)

Function code

1

0x03

Read Holding Register

Starting address

2

0xae39

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

Quantity of registers

2

0x0004

= 4, means read 4 registers

= 8 ≙ 2 * N, means numbers of returned bytes

0x0001

Display Row 1: Differential Pressure

0x0002

Display Row 2: Humidity

0x0003

Display Row 3: Temperature

0x0006

Display Row 4: Ambient Pressure

Seite 41

2.5.14 Explanation of Flags

f

!

i

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 Specific Settings and

It is not possible to verify the value, written to this register. Most of the Specific Holding Registers cannot be validated, if Modbus command Write Multiple

and part 2 of the 32-bit value, depends on the Swap Mode of the Modbus communication (see

Selectable Swap Modes for Rotronic

Color Bits:

E

Red Green Blue

2.5.15 Example: Read Holding Register

2.5.15.1 Read Display Settings (Registers 44'602 to 44'605)

RTU Example:

TCP Example:

RTU number 1 0x01

Byte count 1 0x08

Register value

(see Display

2 * N

Settings)

PF4/5 – Bedienungsanleitung

Seite 42

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

).

PF4/5 – Bedienungsanleitung

Transmit

01 10 ae 39 00 04 08 00 03 00 02 00 01 00 00 67 09

Receive

01 10 ae 39 00 04 31 2f

Transmit

MBAP 01 10 ae 39 00 04 08 00 03 00 02 00 01 00 00

Receive

MBAP 01 10 ae 39 00 04

Field

Bytes

Value

Description

MBAP

7

MBAP

MBAP header (see Modbus RTU / TCP)

Checksum

2

CRC

CRC Checksum (see Modbus RTU / TCP)

Modbus RTU Address (see Device Specific

Settings)

Function code

1

0x10

Write Multiple Register

Starting address

2

0xae39

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

Quantity of registers

2

0x0004

= 4, means read 6 registers

= 8 ≙ 2 * N, means numbers of returned bytes

0x0003

Display Row 1: Temperature

0x0002

Display Row 2: Humidity

0x0001

Display Row 3: Differential Pressure

0x0000

Display Row 4: No value displayed

Seite 43

2.5.16 Example: Write Holding Register

2.5.16.1 Write Display Settings (Registers 44'602 to 44'605)

RTU Example:

TCP Example:

RTU number 1 0x01

Byte count 1 0x08

Register value

(see Display

2 * N

Settings)

Note!

After writing a Write Multiple Register command, it needs a restart of the device to activate the selected changes (see Device Actions or Reset Device).

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

).

PF4/5 – Bedienungsanleitung

Doc. Release

Datum

Bemerkung

E-M-PF4_PF5-Modbus

20.03.2019

Release Document

E-M-PF4_PF5-Modbus V1.2

12.04.2021

Version 2.1

E-M-PF4_PF5-Modbus V1.3

24.03.2023

Modbus RTU Address is the RS485-Adress

Seite 44

Rotronic PF4, PF5 Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1 Modbus protocol

1.1. Structure of the Modbus protocol

1.1.1 Modbus RTU / TCP

1.1.1.1 Modbus RTU

1.1.1.2 Modbus TCP

1.1.1.3 Difference between Modbus RTU and TCP

1.2 Modbus Data Format

1.2.1 16-bit Integer Value

1.2.2 32-bit Float corresponding to IEEE 754

1.2.3 32-bit Integer Value

1.2.4 Selectable Swap Modes for Rotronic Devices

PF4/5 Modbus Fields and Mapping

2.1 PF4/5 Modbus Fields

2.2 Device Specific Coils

2.2.1 Relay and Valve

2.2.2 Sensor Actions

2.2.3 Device Actions

2.2.4 Example: Read Single Coil

2.2.4.1 Read Relay

2.2.5 Example: Write Single Coil

2.2.5.1 Set State of Relay

2.2.6 Example: Reset Device

2.3 Device Specific Discrete Inputs (read only)

2.4 Device Specific Input Registers (read only)

2.4.1 Device Data

2.4.2 Current Values: Float Values

2.4.3 Current Values: Integer Values

2.4.4 Explanation of Flags

2.4.5 Example: Read Input Register

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

2.5 Device Specific Holding Registers

2.5.1 Value Type

2.5.2 Value Unit

2.5.3 Integer Value Scaling

2.5.4 Reference Value Settings

2.5.5 Device Specific Settings

2.5.6 Device Descriptions

2.5.7 Fix Value Settings

2.5.8 Analog Output Settings

2.5.9 Display Settings

2.5.10 Alarm Settings

2.5.11 Relay Settings

2.5.12 Analog Input Settings

2.5.13 Flow Settings

2.5.14 Explanation of Flags

2.5.15 Example: Read Holding Register

2.5.15.1 Read Display Settings (Registers 44'602 to 44'605)

2.5.16 Example: Write Holding Register

2.5.16.1 Write Display Settings (Registers 44'602 to 44'605)

3 Document Releases