Prosoft MVI69-S3964R Siemens 3964R Protocol Communication Module

The module is ideal in control configurations where there

is a need for the CompactLogix processor to exchange

data with other non-Rockwell Automation control devices

in low speed applications.

The MVI69-S3964R can communicate with devices

using two RS-232. RS-422 communication lines (ports).

The ports operate independently from each other.

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The MVI69-S3964R module from ProSoft Technology

allows point-to-point communication between a

CompactLogix processor and a partner with 3964R (with

or without RK512) communication capability.

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 integrity of

the transfer.

General Specifications

• Single Slot - 1769 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.

• Supports CompactLogix and MicroLogix 1500

LRP Controllers except 1769-L23E-QBFC1B,

1769-L16x, and 1769-L18x

Functional Specifications

• Single-slot, CompactLogix I/O 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 CompactLogix processor or

received by the communications partner

• While in 3964R without RK512 mode on PRT1 and

PRT2. data can be sent from the CompactLogix

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 CompactLogix

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.