The MVI56-HART Master Communication Module allows Rockwell Automation ControlLogix I/O compatible processors to easily communicate with HART slave devices. The MVI56-HART module interfaces up to 15 devices on each HART channel with the Rockwell Automation ControlLogix processor. Four channels on the module support master protocol commands to interface with slave devices on their own networks. Each port is individually configurable. Data is exchanged between the HART network and the Rockwell Automation ControlLogix processor backplane using the internal database contained in the module and direct control by the controller's ladder logic and pre-defined data objects (5000 registers maximum).
The MVI56-HART module is the perfect solution for industrial applications in chemical and refining operations, to gas and liquid distribution systems, and remote offshore monitoring stations are addressing virtually all aspects of control, data acquisition, and maintenance.
The HART protocol is supported by major instrument suppliers and the HART Communication Foundation (HCF).
Today, HART is the most widely used digital communications protocol for instruments in the process control industry. More than 105 manufacturers support HART with a choice of more than 170 different field instruments.
Single Slot - 1756 backplane compatible
The module is recognized as an Input/Output module and has access to processor memory for data transfer between processor and module
Ladder Logic is used for data transfer between module and processor. Sample ladder file included.
Configuration data obtained from configuration text file downloaded to module. Sample configuration file included
Local or remote rack
The MVI56-HART module supports the HART Multi-drop implementation of the protocol. Following are some general specifications for the module:
Built in accordance to the HART Bell 202 Frequency Shift Keying (FSK) standard to superimpose digital signals at a low level on top of the 4 to 20mA
Four independent HART master ports that are completely user-configurable
Supports up to 15 devices per port
Point-to-point (slave address 0) or Multi-drop (slave address 1 to 15) modes supported
Supports 99 universal and common practice commands per port to control and monitor devices with integer, IEEE754 floating-point and packed ASCII character string data blocks
Burst mode can be used for faster update of data from a single slave
Supports an auto polling feature that will automatically collect data from each HART instrument on the channel and store the data in the module database
Communication ports can be configured as a secondary master (that is, handheld configuration device)
Protocol Supported: HART protocol uses the Bell 202 standard frequency shift-keying (FSK) digital signal to communicate at 1200 baud, superimposed at a low level on the 4 to 20mA analog measurement signal.
Supported Function Codes: HART Universal Commands Set supported are 00 to 03, 06 to 09, and 11 to 22. HART Common Practice Commands Set supported are 33 to 83 and 105 to 110.
HART Network Communications: Supports four master channels. Each channel on the module is configured independently to emulate a HART master. Burst mode can be used for faster update of data from a slave device.
Command polling is also user-configurable, including disabled, continuous, on change of data (write only), and dynamically user or automatic enabled.
Status: Error codes returned by the HART protocol available on an individual command basis. In addition, a slave status list is maintained per active channel.