Siemens 3964R Protocol

MVI56-3964R

Important! Please Read!

Product Discontinuation Notice

MVI56-3964R will be discontinued effective 06/15/2007. ProSoft offers an improved implementation of the Siemens 3964R protocol in the new MVI56-S3964R module, which is available now.

Please review the Product End of Life Notification for important information on ordering, replacement and support for MVI56-3964R.

The MVI56 3964R Protocol module from ProSoft Technology allows point-to-point communication between a ControlLogix controller (1756-L1, -L1Mx, L55, L63) and a partner with 3964R (with or without RK512) communication capability.

Features and Benefits

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 master-slave protocol with read and write access. A BCC checksum ensures the safety of the transfer.

General Specifications

• Single Slot - 1756 backplane compatible
• Local or remote rack
• 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.
• Configuration data obtained through user-defined ladder. Sample ladder file included.

Applications

The module is ideal in control configurations where there is a need for the ControlLogix controller to exchange data with other non-Rockwell Automation control devices in low speed applications.

The MVI56-3964R 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

• 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 rate 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
• Example programs are provided for using the 3964R protocol with a Siemens ASM 420 / ASM 424 MOBY-I/E communication interface

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 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: