PROFINET Overview

PROFINET IO is an Ethernet-based standard for connecting distributed I/O with controllers for fast data exchange, parameterization, and diagnostics. The bus cycle times for data exchange are down in the millisecond range. Configuring a PROFINET IO system has the same look and feel as in PROFIBUS.

The RMC75E, RMC150E, and RMC200 controllers support PROFINET IO as an IO-Device. Therefore, an IO-Controller must be configured to establish cyclic I/O data connections with the RMC and to initiate acyclic data record transactions:

Cyclic I/O data is automatically exchanged between the PLC and RMC at the specified update time. For example, status information from the RMC, and variables to be written to the RMC would typically be part of the cyclic data. Cyclic I/O data is defined by the Incoming and Outgoing Cyclic I/O Data as described in Setting up a PROFINET I/O Connection.
The RMC75E supports up to 128 registers in each direction, and the RMC150 and RMC200 support up to 256 registers in each direction. Notice that some PLCs may be limited to fewer than the full sized supported by the RMC controllers.

Acyclic datatransactions are performed only when needed and typically for infrequent or large data transfers. For example, if the PLC creates a curve and sends it to the RMC, that data would typically be sent via the acyclic data. Or, if the PLC needs to read a captured plot from the RMC, that is also best done via the acyclic data. Acyclic I/O data is defined by the Record Data. The RMC75E and RMC150E support acyclic transfer of up to 2048 32-bit registers (8192 bytes) in each direction. The RMC200 supports acyclic transfer of up to 4096 32-bit registers (16,384 bytes) in each direction.

The RMC supports only one type of controlling IO connection at a time. Therefore, PROFINET cannot be used simultaneously with an EtherNet/IP IO connection. Other protocols can be used simultaneously with PROFINET.

Further Information

For further information on setting up and using PROFINET IO with RMC controllers, refer to the following topics:

RMC PROFINET IO Specifications

The following chart summarizes the PROFINET IO specifications for the RMC products:

Vendor ID	0x0192
Item	RMC75E	RMC150E	RMC200 CPU20L	RMC200 CPU40
Supported Update Times	2, 4, 8, 16, 32, 64, 128, 256, 512ms	2, 4, 8, 16, 32, 64, 128, 256, 512ms	1, 2, 4, 8, 16, 32, 64, 128, 256, 512 ms	1, 2, 4, 8, 16, 32, 64, 128, 256, 512 ms
Minimum Input Data	32 bytes (8 registers)
Maximum Input Data	512 bytes (128 registers)	1024 bytes (256 registers)	1024 bytes (256 registers)	1024 bytes (256 registers)
Minimum Output Data	32 bytes (8 registers)
Maximum Output Data	512 bytes (128 registers)	1024 bytes (256 registers)	1024 bytes (256 registers)	1024 bytes (256 registers)
Data Consistency	All items
Vendor Name	Delta Computer Systems, Inc.
Device ID	0x0002	0x0003	0x0004	0x0004
Device Name	RMC75E	RMC150E	RMC200 CPU20L	RMC200 CPU40
Certificate No.	Z10245	Z10244	Z12911	Z12353
Node Type	IO-Device
Device Family	I/O, Delta Motion Controllers
PNIO Version	V2.2	V2.2	V2.4	V2.34
Conformance Class	A	A	B	B
Netload Class	III*	III*	III	III
Media Class (Type)	Wired (100BaseTX, Full Duplex)
Redundancy Class	--		MRP Client	MRP Client
Communication Class	RT_CLASS_1
Application Relations	one IO AR, one Device Access AR, implicit AR
Communication Relations	2 IO CR: one input, one output 1 Alarm CR 1 Record Data CR

*Not tested as part of the certificate