Reference MVI56-DH485R
♦
ControlLogix Platform
User Manual
DH485 Interface Module for Remote Chassis
ProSoft Technology, Inc.
Page 55 of 97
August 27, 2009
5 Reference
In This Chapter
Product Specifications ........................................................................... 55
Functional Overview..............................................................................57
DH485 Communication Ports ................................................................ 75
MVI56-DH485R Status Data .................................................................81
Maximum Element Counts For Read/Write Commands ........................ 84
Command Definition Form.....................................................................86
File Override Map Definition Form.........................................................87
5.1 Product
Specifications
The MVI56 DH-485 Communication Module allows ControlLogix compatible
processors to interface easily with other DH-485 protocol compatible devices.
Compatible devices include not only Rockwell Automation PLCs (which support
the DH-485 protocol) but also a wide assortment of end devices.
The MVI56-DH485 module actively issues DH-485 commands to other nodes on
the DH-485 network. One hundred user-defined commands are supported by the
module on each port. The ControlLogix processor can be programmed to control
the activity on the port by actively enabling or disabling each command directly
from the ladder logic.
The module also accepts DH-485 commands from an attached DH-485 master
unit (for example, ControlLogix processor ladder logic MSG instruction). The
module permits a remote master to interact with all data contained in the module.
This data can be derived from other DH-485 slave devices on the network
through a master port or from the ControlLogix processor.
5.1.1 General Specifications
Single Slot - ControlLogix backplane compatible
Designed especially for remote rack implementations
The module is recognized as an Input/Output module and has access to
processor memory for data transfer
Ladder Logic is used for data transfer between module and processor.
Sample Ladder File included
Configuration data obtained from configuration file downloaded to module.
Sample configuration file included
