Rockwell-automation 1771-IJ_IK IK ENCODER/COUNTER MODULES Instrukcja Użytkownika Pobierz pdf (Strona 54)

6–10 Block Transfer Programming

Publication 1771ĆUM006B-EN-P - June 2002

Figure 6.8

Example Ladder Logic for PLCĆ5 Block Transfer

BTW

BLOCK TRNSFR WRITE

Rack

Group

Module

Control Block

N10:10

Data File

Length

Continuous

N10:15

N10:10

N11:10

BTR

BLOCK TRNSFR READ

Rack

Group

Module

Control Block

N11:10

Data File

Length

Continuous

N11:15

File 2, Rung 0

File 2, Rung 1

15965

N10:10

N11:10

Rung Descriptions

Rungs 0 and 1 - Rungs 0 and 1 execute BTW and BTR instructions

alternately. When the processor completes the BTW instruction, it

enables the BTR instruction immediately in the same scan. Enabling

a block transfer instruction places the block transfer request in

queue. There is one queue for each I/O chassis. Waiting time

depends on the number of queued requests ahead of it.

1 2 ... 49 50 51 52 53 54 55 56 57 58 59 ... 67 68

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Rockwell-automation 1771-IJ_IK IK ENCODER/COUNTER MODULES Instrukcja Użytkownika Strona 54