Siemens 3964R Protocol

MVI46-S3964R

The MVI46 S3964R module from ProSoft Technology allows point-to-point communication between an SLC controller and a partner with 3964R (with or without RK512) communication capability.

Features

The 3964R protocol (with or without RK512) 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.

General Specifications

• Single Slot - 1746 backplane compatible (Local or extended I/O rack only. Remote rack not supported
• The module is recognized as an Input/Output module and has access to processor memory for data transfer between processor and module using M0/M1 files
• 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

Applications

The module is ideal in control configurations where there is a need for the SLC controller to exchange data with other non-Rockwell Automation control devices in low speed applications. The MVI46-3964R can communicate with or without RK512 devices using two RS-232, RS-422 communication lines (ports). The ports operate independently from each other

Functional Specifications

• The MVI46-S3964R and the SLC processor communicate via M0 and M1 files
• Single-slot, SLC 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 SLC processor or received by the communications partner
• While in 3964R without RK512 mode on PRT1 and PRT2, data can be sent from the SLC processor or be received from the communications partner
• The maximum user data transfer size is 512 bytes per message in either 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 SLC 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 ease the implementation of the module in the user application.

Hardware Specifications

Ordering Information

Distributors:
Place your order by email to orders@prosoft-technology.com:, fax to +1 661-716-5101.

Sales and Support: