
2-6
General Description
Date Code 980420
SEL-2711 Instruction Manual
defines their specific function. The SEL-2711 can also issue control commands to other nodes
based on control indications from the host system.
In
Section 3: Operation and Network Configuration
, there is a complete description of data
access methods and SEL-2711 operation. In
Section 4: Operation Within SEL-2030
, there is a
description of the register addresses applicable to this data.
Figure 2.3: SEL-2711 Block Diagram
Figure 2.3 shows a block diagram of the SEL-2711. To communicate with the host system, the
SEL-2711 talks to a block of shared memory that is resident on the host system. The SEL-2711
can then operate on the data using its local CPU and memory. The Modbus Plus Peer Processor
controls the Modbus Plus network operations. It interacts with the local CPU using a small dual-
port RAM.