ProSoft Technology PLX51-HART-4I User manual

PLX51-HART-4I / PLX51-HART-4O
HART Input/Output
Multidrop Field Devices
July 6, 2022
USER MANUAL

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PLX51-HART-4I/4O User Manual
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July 6, 2022
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PLX51-HART-4I / PLX51-HART-4O ♦HART Input/Output Contents
Multidrop Field Devices User Manual
Contents
Your Feedback Please ..........................................................................................................2
Content Disclaimer ................................................................................................................2
1Preface 5
1.1 Introduction to the PLX51-HART-4x ............................................................5
1.2 Features.......................................................................................................6
1.3 Architecture..................................................................................................7
1.4 Additional Information ..................................................................................9
1.5 References.................................................................................................10
1.6 Support ......................................................................................................10
2Installation 11
2.1 Module Layout ...........................................................................................11
2.2 Module Mounting .......................................................................................12
2.3 Power.........................................................................................................13
2.4 Analog (HART) – Single Device ................................................................13
2.5 Analog (HART) – Multidrop........................................................................16
2.5.1 Series Configuration ..................................................................................16
2.5.2 Parallel Configuration ................................................................................17
2.6 Ethernet Port..............................................................................................18
3Setup 19
3.1 Install Configuration Software....................................................................19
3.2 Network Parameters ..................................................................................19
3.3 Creating a New Project..............................................................................24
3.4 Module Parameters ...................................................................................26
3.5 Advanced Mapping ....................................................................................30
3.5.1 Diagnostics ................................................................................................31
3.5.2 Multidrop ....................................................................................................33
3.5.3 Custom.......................................................................................................34
3.6 DNP3 Security ...........................................................................................37
3.7 MultiDrop....................................................................................................39
3.8 Module Download ......................................................................................41
3.9 Logix Integration ........................................................................................43
3.9.1 Add Module to I/O Configuration ...............................................................43
3.9.2 Importing UDTs and Mapping Routines ....................................................46
4Operation 48
4.1 Logix 5000 .................................................................................................48
4.1.1 Input Assembly ..........................................................................................48
4.1.2 Output Assembly .......................................................................................51
4.1.3 HART Relay Message ...............................................................................51
4.1.4 Multidrop ....................................................................................................57
4.1.5 HART Channel Command .........................................................................61
4.1.6 HART Process Variable CIP Parameters ..................................................63
4.1.7 HART Custom Command ..........................................................................64
4.2........................................................................................................................................65
4.3 DNP3 Operation.........................................................................................66
4.3.1 DNP3 Security ...........................................................................................68
4.4 Modbus TCP/IP Operation.........................................................................69

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4.4.1 Multidrop ....................................................................................................73
4.4.2 HART Custom Command ..........................................................................80
4.5 PCCC Operation........................................................................................82
4.5.1 Multidrop ....................................................................................................83
4.6 FTView Operation......................................................................................87
4.6.1 Register EDS File ......................................................................................87
4.6.2 Configure FTView Communication............................................................88
4.6.3 Displaying Process Variables ....................................................................90
5Diagnostics 93
5.1 LEDs ..........................................................................................................93
5.2 Module Status Monitoring in the PLX50 Configuration Utility....................94
5.2.1 EtherNet/IP Status .....................................................................................96
5.2.2 Logix Statistics ...........................................................................................97
5.2.3 DNP3 Statistics ..........................................................................................99
5.2.4 Security Statistics ....................................................................................101
5.2.5 Modbus ....................................................................................................102
5.2.6 PCCC.......................................................................................................103
5.3 Channel Status ........................................................................................105
5.4 Device List ...............................................................................................113
5.5 MultiDrop..................................................................................................114
5.6 Calibration................................................................................................114
5.6.1 PLX51-HART-4I Calibration:....................................................................115
5.6.2 PLX51-HART-4O Calibration:..................................................................116
5.7 Module Event Log....................................................................................117
5.8 Web Server..............................................................................................118
5.9 HART Packet Capture .............................................................................119
6Asset Management FDT – DTM Technology 121
7What is HART? 122
7.1 Introduction to HART ...............................................................................122
7.2 HART Response Status...........................................................................123
8Technical Specifications 124
8.1 Dimensions ..............................................................................................124
8.2 Electrical ..................................................................................................125
8.3 Ethernet ...................................................................................................125
8.4 Analog Input Channel (PLX51-HART-4I).................................................125
8.5 Analog Output Channel (PLX51-HART-4O) ............................................126
8.6 Certifications ............................................................................................126
9Support, Service & Warranty 127
9.1 Contacting Technical Support..................................................................127
9.2 Warranty Information ...............................................................................127

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1 Preface
1.1 Introduction to the PLX51-HART-4x
The PLX51-HART-4I and PLX51-HART-4O allows the user to interface up to four
analog HART channels with either EtherNet/IP, Modbus TCP/IP, DNP3 TCP/UDP, or
PCCC (AB-ETH) protocols. This includes 4 to 20 mA input and output devices with or
without HART communications, as well as 0 to 20 mA devices without HART.
The PLX51-HART-4x is available in Input or Output variations:
1) PLX51-HART-4I for HART input devices (e.g. temperature sensor).
2) PLX51-HART-4O for HART output devices (e.g. valve positioners).
The PLX51-HART-4x supports multiple HART devices per channel (multidrop).
Figure 1.1 – PLX51-HART-4O multidrop typical architecture

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1.2 Features
The PLX51-HART-4x can interface analog HART devices to either EtherNet/IP,
Modbus TCP/IP, DNP3 TCP/UDP, PCCC (AB-ETH), or FTView systems.
The conversion to EtherNet/IP enables a HART device to be added directly into the
IO tree of a Controller/PLC (e.g. Allen-Bradley Logix Controller).
The Modbus TCP/IP option enables a HART field device to be viewed as a Modbus
Server, while the DNP3 option converts a HART field device into a DNP3 Outstation.
The DNP3 option supports Secure Authentication, ensuring secure communications
across the Ethernet network.
The PLX51-HART-4x supports PCCC (Allen Bradley legacy protocol – AB-ETH),
which allows an SLC / MicroLogix / PLC5 to read data from HART field device and
write data to HART field devices.
The PLX51-HART-4I or PLX51-HART-4O modules support direct access from a
FTView SCADA or PanelView to read and display data without the need for an
intermediate PLC or controller.
The PLX51-HART-4I or PLX51-HART-4O module also has automatic extraction and
updating of multidrop HART devices which can be accessed via Modbus TCP/IP,
FTView (using CIP parameter objects), or PCCC. When using an EtherNet/IP source,
the user can select either the new or legacy tag format for updating Logix tags using
direct-to-tag technology, where no PLC programming is required.
In addition, a rich collection of process and diagnostic information is provided directly
into Logix, without the use of any explicit messaging. HART commands can also be
relayed to the device using an EtherNet/IP message relay object.
The PLX51-HART-4x modules also allows the sending of custom HART messages
using EtherNet/IP or Modbus TCP. This will allow the user to read or write specific
configured HART commands with custom data from the interface protocol (e.g.
EtherNet/IP).
A DTM (Device Type Manager) is available for simplifying device configuration and
management using an FDT frame.
A built-in webserver provides detailed diagnostics of system configuration and
operation as well as field device specific diagnostics.
The PLX51-HART-4I or PLX51-HART-4O module is configured using the PLX50
Configuration Utility. This software can be downloaded from https://www.prosoft-
technology.com free of charge.
Hereafter the PLX51-HART-4I or PLX51-HART-4O module will be referred to as the
module.

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1.3 Architecture
The figure below provides an example of the typical architecture for a PLX51-HART-
4I interfacing to an EtherNet/IP device (e.g. Allen-Bradley Logix Controller).
Figure 1.2 – PLX51-HART-4I EtherNet/IP typical architecture
The figure below provides an example of the typical architecture for a PLX51-HART-
4x interfacing to a Modbus TCP/IP Client.
Figure 1.3 – PLX51-HART-4I Modbus TCP/IP typical architecture

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The figure below provides an example of the typical architecture for a PLX51-HART-
4I interfacing to a DNP3 Master SCADA.
Figure 1.4 – PLX51-HART-4I DNP3 typical architecture
The figure below provides an example of the typical architecture for a PLX51-HART-
4I interfacing to a SLC using PCCC.
Figure 1.5 – PLX51-HART-4I PCCC interface architecture

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The figure below provides an example of the typical architecture for a PLX51-HART-
4I with multidrop HART devices.
Figure 1.6 – PLX51-HART-4I multidrop architecture
1.4 Additional Information
The following documents contain additional information that can assist the user with
the module installation and operation.

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Table 1.1 - Additional Information
Resource
Link
PLX50 Configuration Utility
Installation https://www.prosoft-technology.com/
User Manual,
Datasheet
Example Code & UDTs
https://www.prosoft-technology.com/
Ethernet wiring standard www.cisco.com/c/en/us/td/docs/video/cds/cde/cde205_220_420/installati
on/guide/cde205_220_420_hig/Connectors.html
1.5 References
Table 1.2 – References
Resource
Link
HART Communication
Foundation http://en.hartcomm.org/
DNP3 http://www.dnp.org
CIP Routing The CIP Networks Library, Volume 1, Appendix C:Data Management
Modbus http://www.modbus.org
1.6 Support
Technical support is provided via the Web (in the form of user manuals, FAQ,
datasheets etc.) to assist with installation, operation, and diagnostics.
For additional support the user can use either of the following:
Table 1.3 – Support Details
Resource
Link
Contact Us link https://www.prosoft-technology.com/
Support email [e-mail]

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2 Installation
2.1 Module Layout
The module has six ports at the bottom of the enclosure as shown in the figure
below. The ports are used for Ethernet, analog HART channels (4), and power. The
power port uses a three-way connector for the DC power supply and the earth
connection.
The Ethernet cable must be wired according to industry standards. See the additional
information section of this document.
Figure 2.1 –Module side view
The module provides six diagnostic LEDs as shown in the front view figure below.
These LEDs are used to provide status of the module system operation, the Ethernet
interface, and the status of each of the four analog HART channels.
Figure 2.2 – PLX51-HART-4I front and top view

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The module provides four DIP switches at the top of the enclosure as shown in the
top view figure above.
Table 2.1 - DIP Switch Settings
DIP Switch
Description
DIP Switch 1 Used to force the module into “Safe Mode”. When in “Safe Mode” the module
will not load the application firmware and will wait for new firmware to be
downloaded. This should only be used in the rare occasion when a firmware
update was interrupted at a critical stage.
DIP Switch 2 This will force the module into DHCP mode which is useful when the user has
forgotten the IP address of the module.
DIP Switch 3 This DIP Switch is used to lock the configuration from being overwritten by the
PLX50 Configuration Utility. When set the PLX50 Configuration Utility will not
be able to download to the module.
DIP Switch 4 When this DIP Switch is set at bootup it will force the module Ethernet IP
address to 192.168.1.100 and network mask 255.255.255.0. The user can then
switch the DIP switch off and assign the module a static IP address if needed.
2.2 Module Mounting
The module provides a DIN rail clip to mount onto a 35mm DIN rail.
Figure 2.3 - DIN rail specification
The DIN rail clip is mounted on the bottom of the module at the back as shown in the
figure below. Use a flat screwdriver to pull the clip downward. This will enable the
user to mount the module onto the DIN rail. Once the module is mounted onto the
DIN rail the clip must be pushed upwards to lock the module onto the DIN rail.

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Figure 2.4 - DIN rail mouting
2.3 Power
A three-way power connector is used to connect Power+, Power– (ground), and
earth. The module requires an input voltage of 10 – 28Vdc. Refer to the technical
specifications section in this document.
Figure 2.5 - Power connector
2.4 Analog (HART) – Single Device
The Analog HART channels are connected using a two-way connector. The input
channels (PLX51-HART-4I) are internally loop powered and therefore can be
connected directly to the field device signal terminals.
Figure 2.6 – PLX51-HART-4I Connection to Field Device (2-wire)

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The output channels (PLX51-HART-4O) source the current directly and therefore can
also be connected directly to the field device signal terminals. The input and output
channels provide internal current limiting and electronic fuse protection.
Figure 2.7 – PLX51-HART-4O Connection
The equivalent Analog Input and Output circuits are shown below.
Figure 2.8 – Analog Input Equivalent Circuit
Figure 2.9 – Analog Output Equivalent Circuit

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The PLX51-HART-4I module supports 2-wire (loop-powered) and 4-wire devices in
various configurations as illustrated below.
Figure 2.10 – Channel Connection - 2-wire – Module Powered
Figure 2.11 – Channel Connection - 4-wire – Device Powered
Figure 2.12 – Channel Connection - 2-wire – Externally Powered

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Figure 2.13 – Channel Connection - 2-wire – Externally Powered with External Resistor
2.5 Analog (HART) – Multidrop
In a multidrop setup the field devices can be connected in either a series or parallel
configuration. The maximum number of devices that can be connected per channel is
as follows:
Table 2.2 - Maximum Device Count
Connection Method
PLX51-HART-4I
PLX51-HART-4O
Series 2 2
Parallel 7 5*
Note: Output devices must be limited to 4 mA.
The above table should be considered as a maximum count, lower counts may be
applicable for some field devices.
2.5.1 Series Configuration
The series connection method has the advantage of the (4-20 mA) current still being
controlled by one of the devices, which may be required in some applications. The
disadvantage is that the supply voltage is divide by the devices, so the maximum
would typically be 2. (Assuming a typical minimum of 10V, and a supply of 24V).
This would apply to each channel of both the PLX51-HART-4O and the PLX51-
HART-4I.
As indicated in the diagrams below, the PLX51-HART-4I can support multidrop
devices in series with either module-powered or externally-powered configurations.
Figure 2.14 – PLX51-HART-4I - Multidrop Wiring – Series – Module Powered

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Figure 2.15 – PLX51-HART-4I - Multidrop Wiring – Series – Externally Powered
Figure 2.16 – PLX51-HART-4O - Multidrop Wiring – Series
Note: It is not recommended to multidrop 4-wire devices unless all devices make use of isolated power
supplies.
2.5.2 Parallel Configuration
Connecting the field devices in parallel is more common although it has the
disadvantage that the 4-20 mA cannot be controlled by any device. Here all of the
field devices remain at 4 mA and all share a common supply voltage.
The PLX51-HART-4O controls the current to a maximum of 20 mA, so using the
same 4 mA per field device, the maximum number of devices is 5. It should be noted
that this only applies to output devices (positioners etc.) that draw only 4 mA when
placed in a non-current modulating mode.
In the case where output field devices attempt to draw more than 4 mA in this mode,
the number of allowable multidrop devices reduces.

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As indicated in the diagrams below, the PLX51-HART-4I can support multidrop
devices in parallel with either module-powered or externally-powered configurations.
Figure 2.17 – PLX51-HART-4I - Multidrop Wiring – Parallel – Module Powered
Figure 2.18 – PLX51-HART-4I - Multidrop Wiring – Parallel – Externally Powered
Figure 2.19 – PLX51-HART-4O - Multidrop Wiring – Parallel
Note: It is not recommended to multidrop 4-wire devices unless all devices make use of isolated power
supplies.
2.6 Ethernet Port
The Ethernet connector should be wired according to industry standards. Refer to the
additional information section in this document for further details.

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3 Setup
3.1 Install Configuration Software
The network setup and configuration of the module is achieved by means of the
PLX50 Configuration Utility. This software can be downloaded from:
https://www.prosoft-technology.com/.
Figure 3.1 - PLX50 Configuration Utility
3.2 Network Parameters
The module will have DHCP (Dynamic Host Configuration Protocol) enabled as
factory default. Thus, a DHCP server must be used to provide the module with the
required network parameters (IP address, subnet mask, etc.). There are a number of
DHCP utilities available, however it is recommended that the DHCP server in the
PLX50 Configuration Utility be used.
Note: When this DIP Switch is set at bootup, it will force the module’s IP address to 192.168.1.100 and
network mask 255.255.255.0. The user can then switch the DIP switch ‘off’ and assign the module a
static IP address.

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Within the PLX50 Configuration Utility, the DHCP server can be found under the
Tools menu.
Figure 3.2 - Selecting DHCP Server
Once opened, the DHCP server will listen on all available network adapters for
DHCP requests and display their corresponding MAC addresses.
Figure 3.3 - DHCP Server
NOTE: If the DHCP requests are not displayed in the DHCP Server, it may be due to the local PC’s
firewall. During installation, the necessary firewall rules are automatically created for the Windows
firewall. Another possibility is that another DHCP Server is operational on the network and it has
assigned the IP address.