Rockwell Automation GMLC Reference Manual - Manual (Page 402)

Publication GMLC-5.2 - November 1999
Chapter
16
RIO Blocks
Use RIO blocks, together with an Allen-Bradley PLC, to check RIO
status, control block transfers, and automatically update formatted data
groups via RIO.
The following table presents the icons for each block in this category
along with a brief description. More detailed descriptions of the blocks
are contained on the pages following this table.
Before you use RIO, be sure to first enable the RIO Interface in the
General and RIO pages of the Configure Control Options dialog box.
Use this block: To:
Check the RIO interface and send the resulting status value to the
operator interface serial port.
• Pause the current task until the selected RIO status condition is
true.
• Evaluate the status of RIO communications.
• Pause the current task until the motion controller detects either a
block transfer read (BTR) or write (BTW) from the RIO scanner.
• Evaluate whether motion controller detects a block transfer read
or block transfer write from the RIO scanner
• Initiate automatic updating to selected RIO data fields.
• Cancel automatic updating to selected RIO data fields.
• Reset the RIO option after a communications failure.