Specify Block Transfer Messages

The block-transfer message types are used to communicate with block-transfer modules over a Universal Remote I/O network.
To:
Select this command:
Read data from a block-transfer module
This message type replaces the BTR instruction
Block-Transfer Read
Write data to a block-transfer module
This message type replaces the BTW instruction
Block-Transfer Write
To configure a block-transfer message, follow these guidelines:
  • The source (for BTW ) and destination (for BTR) tags must be large enough to accept the requested data, except for MESSAGE, AXIS, and MODULE structures.
  • Specify how many 16-bit integers (INT) to send or receive. You can specify from 0 to 64 integers.
    TIP:
    To have the block-transfer module determine how many 16-bit integers to send (BTR), or to have the controller send 64 integers (BTW), type
    0
     for the number of elements.
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