Rockwell Automation AutoMax R-Net Processor Module - Manual (Page 24)

4Ć8
4.1.3 Command Buffer Area
The command buffers in the dual port memory are used to store the
commands for the AutoMax RĆNet Processor module that are
generated by the GATEWAY_CMD_OK@ function. The buffers are
controlled by the GATEWAY_CMD_OK@ function and are not used
by the user.
4.2 Command Codes
The AutoMax RĆNet Processor module communicates over RĆNet
using the AutoMate communications protocol. A subset of the
AutoMate command codes is supported to specify what action is to
be taken by the AutoMax RĆNet Processor module. These codes are
used in the BASIC program and are initiated by executing a
GATEWAY_CMD_OK@ function. The AutoMax RĆNet Processor
module can initiate only commands 1 through 4. However, it can
respond to all of the commands listed below when initiated by an
AutoMate.
OCTAL
AutoMate
CODE COMMAND NAME INSTRUCTION
001 Read Point
002 Write Point
003 Read Register GETRNT
004 Write Register SNDRNT
013 Read Register List
014 Write Multiple Points
050 Who Are You
4.2.1 Read Point
The Read Point command (001) is used to read the value of any
single bit within a register. When initiated by the
GATEWAY_CMD_OK@ function, this command will transfer up to 640
sequential bits from an AutoMate register, starting at any bit position,
to any bit position in the AutoMax RĆNet Processor module's
AutoMate image registers. Because of the processing time required
to align the bits, it is more efficient to transfer multiples of 16 bits with
the Read Register command (003).
4.2.2 Write Point
The Write Point command (002) is used to write a 1" or 0" into any
bit location within a register without affecting any other bits in that
register. When initiated by the GATEWAY_CMD_OK@ function, this
command will transfer up to 640 sequential bits from the AutoMax
RĆNet Processor module's AutoMate image registers, starting at any
bit position, to any bit position in an AutoMate register. Because of
the processing time required to align the bits, it is more efficient to
transfer multiples of 16 bits with the Write Register command (004).