Rockwell-automation 20-COMM-R Remote I/O Adapter Manual do Utilizador descarregar pdf (Página 54)

4-18 Using Discrete and Block Transfer I/O

20-COMM-R Remote I/O Adapter User Manual

Publication 20COMM-UM004D-EN-P

Block Transfer Write Example

The following data is used for this example.

• Rack 1

• Group 4 (upper half rack)

• Slot 0 (always 0)

• Control Block N10:0 (user defined)

• Data File N22:0 (user defined)

• Buffer File M0:x.200 (Block Transfer Writes always start with M0,

where x is the slot in which the 1747-SN scanner card is in. In this

example, the 1747-SN card is in slot 2.)

• Requested Word Count is 18 or less (see See Figure 4.1 on page 4-2

See Figure 4.2 on page 4-3

)

• Transmitter Word Count (always 0)

• Control Block Length (always 3)

Important: Each Block Transfer needs to be offset by 100 (M0:x.200) and

the default is 3300 words, so you can perform up to 33 Block

Transfers. See the advanced configuration for your 1747-SN

scanner card under channel configuration.

Figure 4.12 SLC 500 Series C, FRN 3.xx and Higher, Example Ladder Logic for

Block Transfer Write

1 2 ... 49 50 51 52 53 54 55 56 57 58 59 ... 127 128

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