MVI56-S3964R PROSOFT TECHNOLOGY

Features and Benefits
The 3964R protocol was designed by Siemens for bi-directional data communication through a point-to-point connection. It is a peer to peer protocol with read and write access. A BCC checksum ensures the safety of the transfer.
Applications
The module is ideal in control configurations where there is a need for the ControlLogix processor to exchange data with other non-Rockwell Automation control devices in low speed applications.
The MVI56-S3964R can communicate with devices using two RS-232, RS-422 communication lines (ports). The ports operate independently from each other.
Specifications
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
Single-slot, ControlLogix backplane compatible
Multiple modules can be placed in a rack up to the chassis power supply limit
While in 3964R with RK512 mode on PRT1 and PRT2, DB-SEND and DB-FETCH instructions can be initiated from the ControlLogix processor or received by the communications partner
While in 3964R without RK512 mode on PRT1 and PRT2, data can be sent from the ControlLogix processor or be received from the communications partner
The maximum transfer size is 512 bytes in any mode
Data byte swapping can be configured to adjust to a different word format
While in 3964R with RK512 mode on PRT1 and PRT2, evaluation of the header information DB (data block), DW (data word) and coordination bytes 9 and 10 is possible
Communication activity and diagnostics are available through LEDs and acknowledgment telegrams
Ladder Logic
Ladder logic programming in the ControlLogix processor is required in order to enable and support the Siemens 3964R protocol functionality. The ladder program handles the encoding/decoding of data transferred from the module as well as the initiation of protocol-specific functionality in the module. Example ladder programs are provided with the module to simplify the implementation of the module in the user application.