Siemens S7 PLC EtherNet/IPTM 
Function Blocks

IO Scanner - Roadmap
Migrate Rockwell CPU's to Siemens
& retain the existing EtherNet/IP RIO
1794 Flex IO Coming Soon - 1st Quarter 2022

EtherNet/IP converter

Siemens S7-1500 & S7-1200 PLC EtherNet/IPTM Implicit Message Class 1
Function Blocks for EtherNet/IP IO Adapter communication utilising "Modular Adapter" and "Assembly" connection methods.

Sigma is currently developing Function Blocks for the current Siemens S7 PLC S7-1500 & S7-1200 controllers to allow a S7 CPU to natively communicate with Rockwell EtherNet/IP IO systems. The Function Blocks will utilise the S7 PLC compatible CPU’s integrated Ethernet port or Ethernet Communications Processor with a programmed connection. The Produce/Consume model will be employed by the Sigma Function Block.

Rockwell to Siemens Controller Migration - The barrier to “change” will be “changing”

This will be the most integrated and powerful solution to connect directly from EtherNet/IP Adapter IO to a Siemens S7-1500 or S7-1200 PLC. These solutions when released will allow any Rockwell PLC user to migrate with absolute ease to a Siemens S7 PLC state-of-the-art system and retain the existing installed EtherNet/IP networked IO systems. The solution makes it very easy to partially migrate IO across to your new Siemens CPU as production free windows become available.

The beauty of this solution is the old Rockwell system can be restored by just plugging in the old CPU and disconnecting the S7 CPU. This methodology allows for a staged commissioning approach with a solid commissioning contingency path. By retaining the existing IO initially, the commissioning effort is significantly reduced and is largely centred around the software changes. Comprehensive Software Factory Acceptance Testing with simulation can reduce this even further.

 

The migration strategy supports automation system obsolescence capital planning and cost distribution over a number of financial periods. This approach allows the absolute gains of a new advanced CPU and superior software platforms in the initial phase of the project.

Currently a major automation Vendor provides Rockwell program translation services to Siemens S7 PLC’s. The translation services coupled with the Sigma EtherNet/IP Function Blocks can provide incredibly fast migration opportunities when the existing Ethernet/IP IO systems are retained with their existing IP addresses.

Once the Rockwell controller is migrated to the Siemens S7 CPU, the EtherNet/IP IO systems can be retained until they are ready to be migrated to Siemens PROFINET IO at some time in the future. Both PROFINET and EtherNet/IP RIO can co-exist on the same CPU or Communications Processor Ethernet port. If you are an OEM, this solution allows you to migrate the existing EtherNet/IP installed based to Siemens S7-1500 or S7-1200 based controllers.

Contact us to register your interest and be updated as the Rockwell EtherNet/IP IO family Function Blocks are released.

Rockwell IO systems currently in our development RoadMap include,

  • 1794 Flex I/O

  • 1734 POINT I/O

  • 1738 ArmorPOINT I/O

  • 1756 ControlLogix I/O

  • 1769 Compact I/O

  • 5094 Flex 5000 I/O Modules

S7 EtherNet/IPTM IO Scanner - 1794 Flex IO

In addition to the previously released EtherNet/IP Generic Module Adapter Function Block for the S7-1500 and S7-1200 PLC’s, Sigma is developing Function Blocks to communicate to the entire Rockwell EtherNet/IP Flex IO range. The Rockwell EtherNet/IP Flex IO family utilises a Modular Adapter method (Direct Connection) to collect Adapter IO and this method will also be employed by the Sigma Function Block.

Sigma’s Flex IO Function Block will support a maximum 8 slot Adapter with any combination of simple or complex modules in the entire Flex IO family. Full Configuration of each module will be supported from the S7-1500 & S7-1200 PLC program.

Coming Soon - 1st Quarter 2022

Rockwell to Siemens S7 Migration
Rockwell to Siemens S7 Migration
Rockwell to Siemens S7 Migration

S7 EtherNet/IPTM IO Scanner - 1734 POINT IO

Sigma is developing a Function Block to communicate to the entire Rockwell EtherNet/IP POINT IO range. The Rockwell EtherNet/IP POINT IO family utilises the Assembly Connections method to collect all Adapter IO and this method will also be employed by the Sigma Function Block.

Sigma’s POINT IO Function Block will support a maximum chassis size of 63 modules with any combination of simple or complex modules in the POINT IO family. Configuration of each module is supported from the S7-1500 & S7-1200 PLC program. The construction of the module Configuration is catered for in the Function Block supplied TIA Portal UDT.

 

As for the Rockwell systems, the Sigma POINT IO Function Block configuration assembly size is limited to the maximum packet size of 510 bytes. Configuring modules through a separate tool such as RSNetWorx will allow the configuration to be sent to modules individually and eliminate the packet size limitation.

Rockwell to Siemens S7 Migration