ABB 3BHB017655R0001 Switching value card

The 3964R protocol defined by Siemens is used for bi-directional data exchange between two peers through a bit-serial point-to-point connection. This protocol may be additionally embedded in the RK512 telegram level. If 3964R is used with RK512, each participant can send jobs to his partner and has read (DB-FETCH) and write access (DB-SEND) to the partner's data. The data exchange is realized in the form of messages and response messages. The maximum user data volume is 512 byte per job and 128 byte per message. 3964R without RK512 allows only block wise sending and receiving of data. The detailed handshake procedure through messages and response messages is not applicable in this case

If both partners want to send a job 

(3964R with RK512) or data (3964R without RK512) at the same time, the resulting initialization conflict will be solved through the high/low priority setup. In such a case one partner will be allocated high priority and the other one low priority. Thus, in case of an initialization conflict the device with low priority will defer its job whereas the device with the high priority will be able to send a job. The safety of data transmission on the line is guaranteed by a BCC checksum. You should have sufficient knowledge about the 3964R protocol in order to understand the operation of the driver for the MVI46-3964R and to make efficient use of the example programs.

MVI46-3964R Operation 

The protocol realized on the MVI46-3964R has the following special features: ƒ Immediately after power-up and completion of the internal/external initialization procedures the MVI46-3964R with installed 3964R protocol is ready to serve as an interface between a SLC processor and one or two communication partners using 3964R protocol. The parameterization of the module is realized through a configuration file. This is where a differentiation between the communication modes 3964R with RK512 and 3964R without RK512 takes place. The tables in Chapter 4 show possible entries and configuration examples. ƒ The communication mode 3964R without RK512 supports processing of up to 512 bytes. ƒ The serial transmission parameters are optional and can be allocated independently to each interface. Possible baud rates are 300 to 115200. The following parity setups are possible: Even, Odd and None.

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 ABB、GE/FUANC、FOXBORO、TRICONEX 、BENTLY、A-B、EMERSON 、MOTOROLA、XYVOM、HONEYWELL 、REXROTH、KUKA、NI、DEIF、Yokogawa、WOODWARD、Reliance Electric、SCHNEIDER 、MOOG、PROSOFT、KOLLMORGEN、ICS TRIPLEX、HIMA。