Maximum Configuration

Overview

The maximum configuration is determined by:

BMECXM limits
M580 limits

BMECXM Limits

If one of these limits is reached, the maximum capacity of the configuration is reached. In that case, you can add another BMECXM module in the architecture.

This table shows the maximum configuration of the BMECXM module:

Parameter	Maximum value
Number of devices supported	63
Number of PDO	256 IN 256 OUT NOTE: For more information, refer to device PDO Allocation.
Process image size	4 Kb IN and 4 Kb OUT
BMECXM configuration file (prm file on FDR server)	64 Kb

M580 Limits

This table shows how the maximum configuration can depend on other limits:

Parameter	Depends on
Number of Ethernet slots	Rack type
Number of racks	CPU
Scanner capacity	CPU type for: Number of RIO and DIO equipment supported IN and OUT memory capacity NOTE: All the resources are shared with all the other equipment that is configured on Ethernet I/O.

If these limits are reached, you can distribute the equipment between the RIO or DIO scanner of the CPU or add DIO scanners to the architecture.

PDO

(process data object) An unconfirmed broadcast message sent from a producer device to a consumer device in a CAN-based network. The transmit PDO from the producer device has a specific identifier that corresponds to the receive PDO of the consumer devices.

CPU

(central processing unit) Brain of an industrial manufacturing process, also known as the processor or controller. It automates a process as opposed to relay control systems. CPUs are computers suited to survive the harsh conditions of the industrial environment.

RIO network

An Ethernet-based network that contains three types of RIO de vices: a local rack, an RIO drop, and a ConneXium extended dual-ring switch (DRS). Distributed equipment may also participate in a RIO network via connection to DRSs.

DIO network

A network containing distributed equipment, in which I/O scanning is performed by a CPU with DIO scanner service on the local rack. DIO network traffic is delivered after RIO traffic, which takes priority in an RIO network.