VIM RESS - RESD - RESF VAV CAV regulated register Installation instructions

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Modbus
Interface
Description
VAV-Compact
Volumetric flow compact control device
Edition 2023-12 / V3.08
NT00000923-RESS-RESD-MODBUS-REGISTER-VAV-V3-08-AN-231201
Contents
Modbus general notes
General information
Modbus RTU
Parametrisation
Register implementation
4
Supported commands
Command “Read Discrete Inputs”
Interpret values in the registers
32-bit values in two registers
5
Operation, Service
6
Modbus register overview
Modbus register description
7–9
4
Interface description / VAV-Compact / General notes
Modbus general notes
General information
Date
01.12.2023
Product Name
VAV-Compact
Actuator Type
..MV-D3-MOD, ..HV24A-MOD
Protocol
Modbus RTU over RS-485
Transmission Formats
Address
1-8-N-2, 1-8-N-1, 1-8-E-1, 1-8-O-1
(Default: 1-8-N-2)
9'600, 19'200, 38'400, 76'800, 115'200 Bd
(Default: 38'400 Bd)
1...247 (Default: 1)
Number of Nodes
Max. 32 (without repeater)
Terminating Resistor
120 Ω
Parametrisation
Tool
ZTH EU
Quick addressing
Actuators support quick addressing via the “Address” and “Adaption” buttons.
For detailed information, please see product datasheet (chapter Service).
Register implementation
All data is arranged in a table and addressed by 1..n (Register No.) or 0..n-1
(Address). No distinction is made between data types (Discrete Inputs, Coils,
Input Registers and Holding Registers). As a consequence, all data can be
accessed with the two commands for Holding Register. The commands for
Discrete Inputs and Input Registers can be used as an alternative.
Supported commands
Standard commands:
Read Holding Registers [3]
Write Single Register [6]
Command
“Read Discrete Inputs”
The command reads one or more bits and can alternatively be used for
Register No. 105 (Malfunction and Service Information).
Modbus RTU
Baud Rates
Optional commands:
Read Discrete Inputs [2]
Read Input Registers [4]
Write Multiple Registers [16]
Example:
The start address to be used is 1664 -&gt; 104 (Register Address) * 16 (Bit) = 1664
Interpret values in the registers
All values in the register are unsigned integer data types.
Example:
Read (Function 03, 1 Register)
Value Register No. x
= 0001 1010 1100 10002
= 6,85610
Actual value
= value * scaling factor * unit
= 6,856 * 0.01 * unit
= 68.56 unit
Subject to technical modifications
Interface description / VAV-Compact / General notes
32-bit values in two registers
Values that exceed 65,535 are stored in two consecutive Registers and have to
be interpreted as “little endian” / LSW (Least Significant Word) first.
Example:
Register No. x (Value LowWord)
= 14,55110
= 0011 1000 1101 01112
Value LowWord
= 14,551
= 0011 1000 1101 01112
Register No. x + 1 (Value HighWord)
= 1910
= 0000 0000 0001 00112
Value HighWord
= 19
= 0000 0000 0001 00112
32-bit value
= 0000 0000 0001 0011 0011 1000 1101 01112
= 1,259,73510
= 1,259.735 unit
Math formula:
32-bit value = (Value HighWord * 65,536) + Value LowWord
32-bit value = (19 * 65,536) + 14,551
= 1,259,735
= 1,259.735 unit
Deactivated registers
Subject to technical modifications
If a register is not supported by a device or by a device setting, this is indicated
by 65,535 (1111 1111 1111 11112).
5
6
Interface description / VAV-Compact / Modbus
Modbus register overview
Operation
Service
!
Subject to technical modifications
No.
Address Register
Access
1
0
Setpoint [%]
R/W
2
1
Override Control
R/W
3
2
Command
R/W
4
3
Actuator Type
R
5
4
Relative Position [%]
R
6
5
Absolute Position [&deg;] [mm]
R
7
6
Relative Volumetric Flow [%]
8
7
Absolute Volumetric Flow [m /h]
R
9
8
Sensor Value 1 [mV] [–]
R
10
9
–
11
10
12
11
13
12
No.
Address Register
Access
100
99
Bus Termination
R
101
100
Series Number 1st part
102
101
Series Number 2nd part
103
102
Series Number 4th part
104
103
Firmware Version
R
105
104
Malfunction and Service Information
R
106
105
Min [%]
R
107
106
Max [%]
R/W
108
107
Sensor Type 1
R/W
109
108
Bus Fail Position
R/W
110
109
Communication Watchdog
111
110
Nominal Volumetric Flow [m /h]
–
112
111
–
–
113
112
114
113
115
114
–
–
116
115
–
–
117
116
Control Mode
R/W
118
117
Unit Selection Flow
R/W
119
118
Setpoint Source
R/W
R
3
–
Absolute Flow in unit selected
LowWord
HighWord
Analog Setpoint [%]
R
R
R
R/W
3
Nominal Volumetric Flow in unit selected
LowWord
HighWord
R
All writeable registers &gt;100 are persistent and are not supposed to be written
on a regular basis.
Interface description / VAV-Compact / Modbus
Modbus register description
No.
Address
Description
Comment
Range,
enumeration
Unit
Scaling
Access
1
0
Setpoint
Setpoint for actuator between 0 and Max (No. 107)
0...10'000
Default: 0
%
0.01
R/W
2
1
Override control
Overrides setpoint with defined values.
Use of Fast open / Fast close:
Fast open and Fast close cycles lead to increased
mechanical load. Usage should be limited to certain
time-critical events (e.g. frost protection).
0: None
1: Open
2: Close
3: Min
4: Mid
5: Max
6: Fast open
7: Fast close
Default: None(0)
–
–
R/W
3
2
Command
Initiation of actuator functions for service and test.
After command is sent, register returns to None(0).
With Reset(4), all alfunction and service information
(Register No. 105) can be reset.
0: None
1: Adaption
2: Test
3: Sync
4: Reset
Default: None(0)
–
–
R/W
4
3
Actuator type
0: Actuator not connected –
1: Air / water
2: VAV / EPIV
3: Fire
4: Energy Valve
5: 6way EPIV
–
R
5
4
Relative position
0...10'000
%
0.01
R
6
5
Absolute position
The unit depends on the device:
[&deg;] for actuators with rotary movement
[mm] for actuators with linear movement
0...max angle / stroke
&deg;
mm
1
1
R
7
6
Relative volumetric flow
Relative volumetric flow of Vn'om
0...10'000
%
0.01
R
8
7
Absolute volumetric flow
0...V'nom
m3/h
Pa
1
R
9
8
Sensor 1 value
Current value of sensor 1, depending on the setting
of the Sensor 1 type (Register No. 108)
[mV] if Sensor 1 type (Register No. 108) is Active(1)
[0 / 1] if Sensor 1 type (Register No. 108) is Switch(4)
0...65'535
mV
–
0/1
R
10
9
–
–
–
–
–
11
10
Absolute volumetric flow
Absolute flow in unit selected (Register No. 118) LowWord
Lower 16 bit of 32-bit value
12
11
Absolute volumetric flow
Absolute flow in unit selected (Register No. 118) HighWord
Upper 16 bit of 32-bit value
–
UnitSel 0.001
R
13
12
Analog setpoint
Shows the setpoint in % if actuator is controlled by
analog signal.
0...10'000
%
R
Subject to technical modifications
0.01
7
8
Interface description / VAV-Compact / Modbus
No.
Address
Description
Comment
Range,
enumeration
Unit
Scaling Access
100
99
Bus termination
Indicates if bus termination (120 Ω) is enabled.
Bus termination can be set with the configuration tools.
0: Inactive
1: Active
Default: Inactive(0)
–
–
R
101
100
Series number 1st part
Each device has an unambiguous series number,
which is either impressed on or glued to the housing.
The series number consists of 4 segments, although
only parts 1, 2 and 4 are displayed on Modbus.
–
–
–
R
Example: 00839-31324-064-008
1st part: 00839
2nd part: 31324
4th part: 008
102
101
Series number 2 nd part
–
–
–
R
103
102
Series number 4 part
–
–
–
R
104
103
Firmware version
Firmware version of communication module
–
–
–
R
Bitmask =
–
–
R
th
Example: 302, Version 3.02
105
104
Malfunction and service information
Value is bit-coded. More than one bit can be set to 1.
Not all bits mentioned in the enumeration are used for
this actuator range.
1: M
echanical travel increased: The actuator has
been moved outside the adapted working range.
2: A
ctuator cannot move: Mechanical overload, e.g.
blocked actuator, etc.
8: Internal activity: Actuator performs a test run,
adaptation, etc.
9: Gear train disengaged: The manual override
button is pressed.
10: Bus Watchdog triggered: Timeout for the
Bus Watchdog expired.
Bit0: –
Bit1: Mechanical travel increased
Bit2: Actuator cannot move
Bit3: –
Bit4: –
Bit5: –
Bit6: –
Bit7: –
Bit8: Internal activity
Bit9: Gear train disengaged
Bit10: Bus Watchdog triggered
Bit11: –
Bit12: –
Bit13: –
Bit14: –
Bit15: –
106
105
Vmin
Min has to be ≤ Max
0...Vmax
Default: 0
%
0.01
R/W
107
106
Vmax
Max has to be ≥ Min and &gt;20%
Vmin...10'000
Default: 10'000
%
0.01
R/W
108
107
Sensor 1 type
If Setpoint Source (Register No. 119) is Analog (hybrid
mode), the sensor type 1 can be set to Active(1) in
order to see the Analog Setpoint in mV.
Note: After changing the sensor type, it might be
necessary to restart the actuator in order for
correct sensor values to be read out.
For setting “4: Switch” it is mandatory that the
control signal is parametrised to 2...10 V.
0: None
1: Active / hybrid
2: –
3: –
4: Switch
Default: None(0)
–
–
R/W
Subject to technical modifications
Interface description / VAV-Compact / Modbus
No.
Address
Description
Comment
Unit
Scaling Access
109
108
Bus fail position
0: None / last setpoint
Modbus communication is not monitored by default.
1: Fast close
In the event of a breakdown in communication, the
2: Fast open
actuator retains the current setpoint.
3: Mid position (parametrised)
The bus implementation tracks the Modbus
Default: None(0)
communication.
If neither the Setpoint (Register No. 1) nor the Override
Control (Register No. 2) is renewed before the timout for
Bus Watchdog (Register No. 110) expires, the actuator
moves to the Bus Fail Position.
Triggered bus watchdog is indicated in the Malfunction
and Service Information (Register No. 105).
In hybrid mode (SpSource (Register No. 119) = Analog),
bus monitoring is not activated.
–
–
R/W
110
109
Timeout for bus watchdog in s
Time until Bus Fail will be detected.
If Bus Watchdog = 0 then deactivated
If Bus Fail Position (Register No. 109) different from 0,
the Bus Fail Position becomes active after the Timeout
for Bus Watchdog has expired.
0...3'600
s
Default: 0
If Bus Fail Position (Register No. 109)
not None(0), then
Default: 120
1
R/W
111
110
Nominal volumetric flow
–
m3/h
1
R
112
111
–
–
–
–
–
113
112
Nominal volumetric flow
Vnom in unit selected (Register No. 118) LowWord
Lower 16 bit of 32-bit value
–
UnitSel 0.001
R
114
113
Nominal volumetric flow
Vnom in unit selected (Register No. 118) HighWord
Upper 16 bit of 32-bit value
115
114
–
–
–
–
–
116
115
–
–
–
–
–
117
116
Control mode
0: Position control
1: Flow control
–
–
R/W
118
117
Unit selection flow
0: m3/s
1: m3/h
2: l/s
3: l/min
–
–
R/W
119
118
Setpoint source
Analog: Setpoint from analog signal 0...10 V on wire 3.
Bus: Setpoint from Modbus (Register No. 1).
0: Analog
1: Bus
Default: Bus(1)
–
–
R/W
Description Access: R = Read, W = Write
Subject to technical modifications
Range,
enumeration
4: l/h
5: gpm
6: cfm
Default: m3/h(1)
9
All inclusive.
Belimo as a global market leader develops innovative solutions for
the controlling of heating, ventilation and air-conditioning systems.
Damper actuators, control valves, sensors and meters represent our
core business.
Always focusing on customer value, we deliver more than only products. We offer you the complete product range for the regulation and
control of HVAC systems from a single source. At the same time, we
rely on tested Swiss quality with a five-year warranty. Our worldwide
representatives in over 80 countries guarantee short delivery times
and comprehensive support through the entire product life. Belimo
does indeed include everything.
The “small” Belimo devices have a big impact on comfort, energy efficiency, safety, installation and maintenance.
5-year warranty
On site around the globe
Complete product range
Tested quality
Short delivery times
In short: Small devices, big impact.
EN – 2023-12/A – Subject to technical modifications
Comprehensive support
BELIMO Automation AG
Brunnenbachstrasse 1, 8340 Hinwil, Switzerland
+41 43 843 61 11, [email protected], www.belimo.com
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