Product Introduction and System Integration

The ProSoft ILX56-PBM provides a flexible communication solution for integrating PROFIBUS equipment into ControlLogix automation systems. Installed in a compatible ControlLogix chassis, it exchanges process data with the controller through the backplane while maintaining a separate PROFIBUS interface for field-level communication.

When configured as a Master, the module manages cyclic communication with connected PROFIBUS slave devices. It can also access acyclic data and diagnostic information through DPV1 services. This is useful in installations where operators need both process values and detailed device status information.

In Multi-Slave mode, the module can emulate up to 10 PROFIBUS slave nodes. This allows an external PROFIBUS master to exchange data with the ControlLogix system, making the module useful for connecting separate control platforms or integrating legacy equipment.

The ILX56-PBM also provides tools for network configuration and troubleshooting, including GSD-based device integration, an Add-On Profile, Add-On Instructions, and packet capture capabilities. During commissioning, engineers should verify the network baud rate, station addresses, device configuration, I/O mapping, and bus termination.

For facilities maintaining mixed-vendor automation equipment, the ILX56-PBM offers a practical way to preserve PROFIBUS connectivity while using the ControlLogix platform for centralized control.

Technical Specifications

Parameter	Description
Brand	ProSoft Technology
Model	ILX56-PBM
Product Type	PROFIBUS DP Master/Slave Communication Module
Platform	Rockwell Automation ControlLogix
Communication Protocol	PROFIBUS DPV0 / DPV1
Operating Modes	DP Master / Multi-Slave
Maximum Master Devices	125 PROFIBUS slaves
Maximum Slave Emulation	10 PROFIBUS nodes
Master Input Data	Up to 5,000 bytes
Master Output Data	Up to 5,000 bytes
Slave Input Data	Up to 2,440 bytes
Slave Output Data	Up to 2,440 bytes
Communication Interface	Isolated RS-485
Connector	Female DB9
Baud Rate	9.6 kbps to 12 Mbps
DPV1 Services	Class 1 and Class 2 messaging, alarm handling
Backplane Current Load	450 mA at 5 VDC; 2 mA at 24 VDC
Enclosure Rating	IP20, NEMA/UL Open Type
Operating Temperature	-20°C to 70°C
Dimensions	54.61 x 35.05 x 179.07 mm
Weight	0.454 kg / 1.00 lb

Recommended Related Models

Model	Product Description
ILX56-PBS	ProSoft PROFIBUS DP Slave Communication Module for ControlLogix
MVI56-PDPMV1	ProSoft PROFIBUS DPV1 Master Communication Module for ControlLogix
MVI56-PDPS	ProSoft PROFIBUS DP Slave Communication Module for ControlLogix
MVI56-PBM	ProSoft PROFIBUS DP Master Communication Module for ControlLogix

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Applications

The ILX56-PBM is suitable for industrial facilities that need communication between ControlLogix controllers and PROFIBUS-based equipment.

PLC Network Integration: Connects ControlLogix processors with third-party PLCs and automation systems using PROFIBUS DP.
Distributed I/O Communication: Exchanges cyclic input and output data with PROFIBUS remote I/O stations.
Drive Control: Supports communication with compatible PROFIBUS frequency converters, motor drives, and other field devices.
Legacy System Integration: Connects newer ControlLogix platforms to existing PROFIBUS automation networks.
Multi-Master Architectures: Supports DPV1 Class 2 messaging for applications requiring communication between multiple PROFIBUS masters and devices.
Network Gateway Applications: Operates as a PROFIBUS master or emulates multiple slave nodes to support different system integration requirements.

Advantages and Key Features

Dual Master and Multi-Slave Operation

The module can operate as a PROFIBUS DP Master or emulate up to 10 individual slave nodes. This flexibility supports both device-level network management and controller-to-controller data exchange.

Large Cyclic Data Capacity

In Master mode, the ILX56-PBM supports up to 5,000 bytes of input data and 5,000 bytes of output data. This provides substantial capacity for applications involving multiple PROFIBUS devices.

DPV0 and DPV1 Protocol Support

The module supports cyclic DPV0 data exchange and advanced DPV1 services, including Class 1 and Class 2 messaging in Master mode. DPV1 alarm handling also provides access to device diagnostic information.

Wide Baud Rate Selection

Supported communication speeds range from 9.6 kbps to 12 Mbps, allowing the module to integrate with PROFIBUS networks operating at different transmission rates.

Electrical Isolation

The PROFIBUS interface is electrically isolated, helping reduce the effects of ground-potential differences and electrical interference between network equipment and the ControlLogix system.

ControlLogix Integration Tools

A custom Add-On Profile, project-specific Add-On Instructions, and PROFIBUS DP packet capture utility help simplify configuration, diagnostics, and data exchange within the Rockwell Automation environment.

Technical FAQs

Q1: What is the main function of the ProSoft ILX56-PBM?

It provides PROFIBUS DPV1 communication for ControlLogix processors. It allows a ControlLogix system to exchange data with PROFIBUS-compatible PLCs, drives, remote I/O stations, and other industrial devices.

Q2: Can the ILX56-PBM operate as both a PROFIBUS Master and Slave?

Yes. It supports Master operation and Multi-Slave emulation. In Master mode, it controls communication with PROFIBUS slave devices. In Slave mode, it can represent up to 10 individual PROFIBUS nodes to another master.

Q3: How many PROFIBUS devices can the module manage in Master mode?

It supports up to 125 PROFIBUS slave devices. The actual network capacity depends on the configured data sizes, device capabilities, and overall bus design.

Q4: What is the maximum cyclic I/O data capacity?

In Master mode, the module supports up to 5,000 bytes of input data and 5,000 bytes of output data. In Multi-Slave mode, the aggregate input and output data capacity is up to 2,440 bytes each.

Q5: Which PROFIBUS communication speeds are supported?

The module supports 9.6 kbps, 19.2 kbps, 45.45 kbps, 93.75 kbps, 187.5 kbps, 500 kbps, 1.5 Mbps, 3 Mbps, 6 Mbps, and 12 Mbps.

Q6: What is the difference between DPV0 and DPV1?

DPV0 primarily provides cyclic data exchange between the master and slave devices. DPV1 extends this functionality with acyclic read/write services and alarm handling, allowing more detailed device communication and diagnostics.

Q7: What physical interface does the ILX56-PBM use?

It uses an isolated RS-485 PROFIBUS interface with a female DB9 connector. Correct cable termination, shielding, grounding, and network topology are important for stable communication.

Q8: Which software tools are used to configure the module?

The module uses ProSoft configuration tools and a ControlLogix Add-On Profile for integration. Project-specific Add-On Instructions are also available to simplify communication data handling.

Q9: What should be checked if PROFIBUS communication fails?

Check the station addresses, baud rate, bus termination, cable shielding, connector wiring, and device configuration. Also verify the GSD files, slave diagnostics, and module status information.

Q10: Can the ILX56-PBM support communication with two PROFIBUS masters?

The module supports DPV1 Class 2 messaging and includes firmware enhancements for Master redundancy applications. The exact network arrangement must follow the supported redundancy configuration and the capabilities of the connected devices.

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