AMCI SD17060E2, Руководство пользователя

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C
ONFIGURATION
M
ODE
D
ATA
F
ORMAT
Networked Indexer/Driver User Manual
ADVANCED MICRO CONTROLS INC.
60
Configuration Mode Data Format (continued)
Multi-Word Data Format
Sixteen bit integers support a range of values from -32,768 to 32,767 or 0 to 65,535. The Starting Speed
parameter, which is programmed as part of the configuration data, can exceed this range. In applications that
do not use an EDS file, this parameter is transmitted in two separate words. The table below shows how val-
ues are split. Note that negative values are written as negative numbers in both words.
Table R6.1 Multi-Word Format Examples
EtherNet/IP applications that use a non-generic EDS file specify the Starting Speed in the con-
figuration registers that are created when the Networked Driver was added to the project. The
EDS file creates a double precision integer for the Starting Speed parameter and it is pro-
grammed as a thirty-two bit integer. The multi-word format shown above is not used.
Command Mode Data Formats
When issuing commands to the Networked Driver, there are several parameters that are larger than sixteen
bits. These parameters are:

Target Position

Programmed Speed

Stopping Distance

Minimum Registration Move Distance

Position Preset Value

Encoder Preset Value
Likewise, when reading data back from a Networked Driver while it is in Command Mode, there are values
that are larger than sixteen bits. These data values are:

Motor Position

Encoder Position

Captured Encoder Position
By default, these thirty-two bit parameters and data values are written to and read from the Networked Driver
using the multi-word format described above. When configuring the Networked Driver, it is possible to pro-
gram it to use a 32-bit double integer format instead of the custom format shown above.
There are two separate programming bits. The Binary_Output_Format Bit, controls the format of the pro-
grammable parameters written to the Networked Driver when issuing commands. The Binary_Input_Format
Bit, controls the format of the data values written to the host controller by the Networked Driver.
EtherNet/IP applications that use a non-generic EDS file have the parameters and data values
listed above defined as double integers. In these applications, the
Binary_Output_Format Bit,
and the
Binary_Input_Format Bit
must both be set to “1” so that the data is transferred as
thirty-two bit integers.
When using the signed thirty-two bit format, there is an additional parameter named Data Endian. Host

controllers that use the EtherNet/IP protocol typically use little endian format, while controllers that use
PROFINET or the Modbus protocol typically use the big endian format.
Value First Word Second Word
12 0 12
12,345 12 345