Logix5000 Controllers General Instructions - SLAC Confluence

Input/Output Instructions (MSG, GSV, SSV, IOT) 161Specify SLC messagesUse the SLC message types to communicate with SLC and MicroLogixcontrollers. The following table shows which data types that theinstruction lets you access. The table also shows the correspondingLogix5000 data type.For this SLC or MicroLogix Data TypeFL (MicroLogix 1200 and 1500 controllers)NUse This Logix5000 Data TypeREALDINTINTSpecify block-transfer messagesThe block-transfer message types are used to communicate withblock-transfer modules over a Universal Remote I/O network.If You Want Toread data from a block-transfer module.Select This CommandBlock-Transfer ReadThis message type replaces the BTR instruction.write data to a block-transfer module.Block-Transfer WriteThis message type replaces the BTW instruction.To configure a block-transfer message, follow these guidelines:• The source (for BTW) and destination (for BTR) tags must belarge enough to accept the requested data, except for MESSAGE,AXIS, and MODULE structures.• Specify how many 16-bit integers (INT) to send or receive. Youcan specify from 0 to 64 integers.If You Want TheBlock-transfer module to determine how many16-bit integers to send (BTR).Controller to send 64 integers (BTW).Then Specify0 for the number of elementsPublication 1756-RM003I-EN-P - January 2007