Rockwell-automation 1771-IJ_IK IK ENCODER/COUNTER MODULES Manual de usuario descargar pdf (Pagina 42)

5–12 Single Transfer Programming

Publication 1771ĆUM006B-EN-P - June 2002

Note: In some applications, it may be feasible to designate an input

location for the purpose of scan counter control. In this instance, an

on-delay timer (TON) instruction can be used to multiplex output

data to the encoder/counter module. A timer with 0.1-second

resolution is acceptable for this purpose. Each step of Table 5.A can

be programmed to be executed at a 0.1-second interval from the

previous step.

Figure 5.8 is an example program for single-transfer multiplexing of

output words to the encoder/counter module. This example uses the

type of scan counter recommended for PLC-2 processors. However,

the general format of these rungs would be the same for a PLC

processor, with addressing differences, substitution of the type of

scan counter shown in Figure 5.7, and other minor changes.

Figure 5.8

Example Program Ć Single Transfer

030

CTU

PR003

AC000

030

CTU

PR003

AC000

Branch End Instruction

012

PUT

030 201 051

001

012

PUT

030 202

052

002

012

PUT

030 203

053

003

03003015

Scan

Counter

Output

Control

Word

Output

Preset

Word #1

Output

Reset

Preset

Word #2

Scan

Counter

For the PLC processor, values of constants would be 003 in rung 4, 005 in rung 5.

Rung

No.

15959

CTR

Example Program Ć Single

Transfer

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 67 68

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