ABB DSAO 110 DSAO110  Pulse accumulator module

The instructions must be programmed in the SLC processor according to this specification and transferred into the MVI46-3964R. The MVI46-3964R subsequently communicates with the ASM 420 via 3964R without RK512 to manipulate the MDS according to your requirements. It is possible to use either the "normal mode" or the "ECC special driver" to interface to the MDS. The SLC processor example program will be explained in Ladder Logic.Implementation in the SLC processor example program: This instruction uses the "normal mode" of the MDS. If you want to use the "ECC special driver", you have to change the instruction command as explained in the technical description. In our example we read 20 bytes from the MDS.

MOBY Instruction Set ASM 420 

This section provides a short overview about the MOBY instruction set and its realization in the SLC processor example program. The ASM 420 makes no difference between MOBY-I and MOBY-E, therefore all instructions are valid for both systems. The MOBY instruction set is described in detail in the Technical Description Identsystem MOBY-I, Interface Module ASM 420, Publication No. 6GT2097- 3AF00-0DA2. Please refer to that manual for additional information.

The switches 8–10 are the only ones used for this application.

 Switch 8 sets the serial port to RS-422. The ASM 424 brings the baud rate automatically into line with the MVI46-3964R (9600 Baud in our example).These parameters have to be fixed for the MVI46-3964R to operate with the ASM 424. The switches 9 and 10 select 3964R as the standard communication procedure. There is no other choice in our case, because 3964R is the only procedure offered by the MVI46-3964R. Additional parameters for the ASM 424 can be set through a RESET command. Please refer to: Programming Reference: MOBY C-Library MOBY API on the CD "Software Moby" Publication No. 6GT2 080-2AA10.

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