ABB Arc Guard System TVOC-2-COM Instruction sheet

— Arc Guard System™ – TVOC-2-COM Modbus Configuration manual
—
1SFC170017M0201 EN, REV C
Arc Guard System™ – TVOC-2-COM
Modbus configuration manual
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Thank you for selecting this ABB TVOC-2 Arc Guard
System™. Carefully read and make sure that you
understand all instructions before you mount, connect,
configure the Arc Guard System.
This manual is intended for configuration of the TVOC-2-
COM Modbus interface.
The manual is available on:
http://new.abb.com/low-voltage/products/arc-guard
• Only authorized and appropriately trained personnel
are allowed to install and make the electrical
connection of the Arc Guard System in accordance with
existing laws and regulations.
• Only authorized personnel are allowed to do service
and repair on the Arc Guard System.
• Unauthorized repair will effect the warranty.
• This manual is a part of the TVOC-2 Arc Guard System.
Always keep this manual available when working with
the TVOC-2 Arc Guard System.
• Examine the Arc Guard System and the package when
you unpack your new product. If there are damages,
please contact the transportation company or the ABB
reseller/office immediately.
Safety notes
In this user manual, these symbols are used:
WARNING
General warning symbol indicates the presence
of a hazard which could result in personal injury
and damage to equipment or property.
WARNING
Warning symbol indicates the presence of
hazardous voltage which could result in personal
injury.
INFORMATION
Information sign alerts the reader to relevant
facts and conditions.
Modications to data in this manual can be applied without
notice.
General safety information
WARNING
Only authorized and appropriately trained
personnel are allowed to install and make the
electrical connection of the Arc Guard System in
accordance with existing laws and regulations.
WARNING
Examine the Arc Guard System and the package
when you unpack your new product. If there are
damages, please contact the transportation
company or the ABB reseller/office immediately.
WARNING
Only authorized and appropriately trained
service personnel are allowed to do service
and repair on the Arc Guard System. Note:
unauthorized repair will effect the warranty.
Personal
Service and repair should be performed
by authorized personnel only. Note that
unauthorized repair affects safety and warranty.
—
Read this first
Warning and safety
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—
Arc Guard System™
TVOC-2-COM Modbus
Configuration manual
GENERAL
INFORMATION
P. 7
TROUBLESHOOTING
P. 33
MODBUS
INSTALLATION
P. 11
CHANGING MODBUS ID
AND COMMUNICATION
PARAMETERS
P. 15
FUNCTIONAL
DESCRIPTION
P. 19
01010203040506
INDEX
P. 36
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ABB ARC GUARD SYSTEM™ – TVOC-2-COM MODBUS CONFIGURATION MANUAL 7
01
8 1.1 Introduction
8 1.2 references
8 1.3 Quick start-up
—
1 General information
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8ABB ARC GUARD SYSTEM™ – TVOC-2-COM MODBUS CONFIGURATION MANUAL
1.1 Introduction
This manual covers the Modbus interface, which offers
a direct connection to Modbus-RTU for the Arc Guard
System™ TVOC-2.
TVOC-2-COM will behave as a slave. This means all
communication will be performed by a master device on
the same Modbus system. Mostly this will be a PLC. This
manual explains how to install the Arc Guard System™
TVOC-2-COM to your Modbus system.
1.2 References
[1] http://www.modbus.org/docs/Modbus_Application_
Protocol_V1_1b3.pdf (2012)
[2] http://www.modbus.org/docs/Modbus_over_serial_
line_V1_02.pdf (2006)
[3] https://www.modbusdriver.com/modpoll.html
1.3 Quick start-up
1Make sure your Modbus master has been installed to
the system.
2The TVOC-2-COM will be delivered with the following
configuration:
• baud rate 19200
• parity even
• stop bits 1
• Modbus ID 248*
*Modbus ID 248 is not a valid id for a Modbus system but is used to indicate that the
communication is disabled.
3Physically connect the system to the Modbus network.
4Test communication between your master and
the TVOC-2 system. For example see chapter 5
Troubleshooting.
Figure 1
Quick start-up
Master
present
START
Set Modbus
id of TVOC-2
Connect
TVOC-2
System
Test
Ready
1
2
3
4
01
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ABB ARC GUARD SYSTEM™ – TVOC-2-COM MODBUS CONFIGURATION MANUAL 9
01
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ABB ARC GUARD SYSTEM™ – TVOC-2-COM MODBUS CONFIGURATION MANUAL 11
02
12 2.1 General
12 2.2 Modbus connector
12 2.3 Modbus cables
13 2.4 Termination
—
2 Modbus installation
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12 ABB ARC GUARD SYSTEM™ – TVOC-2-COM MODBUS CONFIGURATION MANUAL
2.1 General
Modbus/RTU is a 2-wire, RS485-based field bus
communication system for parameter value exchange.
INFORMATION
The implementation of the Modbus interface is
based on standards [1] and [2].
2.2 Modbus connector
The supplied Modbus connector has the following pin
configuration:
Table 1 Modbus Connector
Terminal EIA/TIA-485 name ITr/IDv Description
+(B) B/B’ D1 Transceiver terminal 1
Terminator 1 input*
-(A) A/A’ D0 Transceiver terminal 0
Terminator 2 input*
DGND C/C’ Common Signal common
* If the device is connected as first or last device in a multi-drop system, a 120Ω terminator resistor should be installed between terminator inputs (A) and (B).
2.3 Modbus cables
Recommended cable: Belden 3105A (AWG22).
Figure 2
Modbus connector
+(B) -(A) DGND
02
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ABB ARC GUARD SYSTEM™ – TVOC-2-COM MODBUS CONFIGURATION MANUAL 13
2.4 Termination
For best quality of data transfer, Modbus should be
terminated correctly.
The following figure shows Modbus installation according
to [3].
2.4.1 Termination resistors
A 120Ω resistor is added in parallel with TVOC-2 System
connection if it is installed as first or last device on the
network. For this purpose there are double terminals for
+(B) and -(A) connections.
2.4.2 Pull-up / pull-down resistors
When the Modbus network is not being actively driven
by a device, the bus line is in an undefined state. Bias
resistors should then be used to obtain a defined voltage
potential on the data lines. The bias resistors act for data
line B (D1) as pull-up resistors against 5V and for data
line A (D0) as pull-down resistors against GND. This is
illustrated in Figure 20 in [2].
The following devices usually have built-in bias resistors:
• Modbus masters
• Gateways
• Repeaters
Figure 3
General 2-Wire Topology
02
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ABB ARC GUARD SYSTEM™ – TVOC-2-COM MODBUS CONFIGURATION MANUAL 15
03
16 3.1 Changing Modbus ID and communication parameters
16 3.2 Configuration via HMI
—
3 Changing Modbus ID and
communication parameters
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16 ABB ARC GUARD SYSTEM™ – TVOC-2-COM MODBUS CONFIGURATION MANUAL
3.1 Changing Modbus ID and
communication parameters
On delivery the default parameters are:
• Modbus ID 248
• Baud rate 19200
• Parity even
• Data bits 8
• Stop bits 1
The parameters should be changed to fit the existing
network.
3.2 Configuration via HMI
Use the HMI to navigate to menu 3.4 Modbus
Select appropriate submenu to change configuration.
Note: The Modbus ID must be changed to enable
communication. The default ID of 248 only indicates that
the Modbus communication is disabled. It is not a valid ID
in a Modbus network. Valid ID range is 1-247.
Figure 4
Menu 3.4 Modbus
03
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ABB ARC GUARD SYSTEM™ – TVOC-2-COM MODBUS CONFIGURATION MANUAL 19
04
20 4.1 Functional description
20 4.2 Implementation class
20 4.3 Supported Modbus functions
4.4 Register data format
25 4.4.1 Trip information
26 4.4.2 Diagnostics information
26 4.4.3 Error information
27 4.4.4 Custom name registers
27 4.4.5 Installed modules
28 4.4.6 Dip switches
28 4.4.7 Version information
30 4.4.8 Reset
30 4.4.9 System date
30 4.4.10 System time HHMM
30 4.4.11 Modbus failure register
31 4.4.12 System state
31 4.4.13 Diagnostic Trouble Code, number x
—
4 Functional description
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20 ABB ARC GUARD SYSTEM™ – TVOC-2-COM MODBUS CONFIGURATION MANUAL
4.1 Functional description
The information found here is the basic information
needed for the installation of a Modbus system.
4.2 Implementation class
The physical and data link layer are implemented
conforming to the “basic slave” implementation class
as described in document [2] “MODBUS over Serial Line
specification and implementation guide V1.02”.
The following options have been implemented:
Table 2 Modbus Parameters
General settings
Parameter Options Remarks
Addressing address configurable 1-248 (default 248) When set to 248, the communication is
disabled.
Baud rate 9600
19200 (default)
38400
57600
Parity none
even (default)
odd
Data bits 8 Not configurable.
Stop bits 1 (default)
1.5
2
The use of no parity requires 2 stop bits.
Electrical interface RS485 2W cabling
4.3 Supported Modbus functions
This section describes the supported Modbus function
codes.
4.3.1 Read Registers (03, 04)
Both function 03, Read Holding Registers and function 04,
Read Input Registers, can be used. The addresses are the
same.
Table 3 Read Exceptions
Possible exception responses
Code Name Meaning
02 ILLEGAL_DATA_ADDRESS Address refers to a register that is not available
or not readable.
04
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