Rockwell Automation Allen-Bradley DriveLogix 5730, User Manual

Page: 118 / 209

6-20 Communicating with Devices on an EtherNet/IP Link
For MSG instructions originating from a DriveLogix5730 controller to a
PLC or SLC controller:
The DriveLogix5730 controller can send typed or word-range commands to
PLC-5 controllers. These commands read and write data differently. The
following diagrams show how the typed and word-range commands differ.
Type of MSG
Instruction:
Supported Source File Types: Supported Destination File Types:
DriveLogix5730
writes to PLC-5 or
SLC In the DriveLogix5730 controller, specify the source data type
based on the destination device:
PLC-5: SINT, INT, DINT, or REAL
SLC: INT, REAL
Example source element: array_1
Specify the destination file type based on the
destination device:
PLC-5 typed write: S, B, N, or F
PLC-5 word-range write: S, B, N, F, I, O, A, or D
SLC: B, N or F
Example destination tag: N7:10
DriveLogix5730
writes to PLC-2 In the DriveLogix5730 controller, select one of these data
types:
SINT, INT, DINT, or REAL
Example source element: array_1
Use the PLC-2 compatibility file.
Example destination tag: 010
DriveLogix5730
reads from PLC-5
or SLC Specify the destination file type based on the destination
device:
PLC-5 typed read: S, B, N, or F
PLC-5 word-range read: S, B, N, F, I, O, A, or D
SLC: B, N or F
Example source element: N7:10
In the DriveLogix5730 controller, specify the destination data
type based on the destination device:
PLC-5: SINT, INT, DINT, or REAL
SLC: INT, REAL
Example destination tag: array_1
DriveLogix5730
reads from PLC-2 Use the PLC-2 compatibility file.
Example source element: 010
In the DriveLogix5730 controller, select one of these data
types:
SINT, INT, DINT, or REAL
Example destination tag: array_1
16-bit words in
PLC-5 controller
32-bit words in
DriveLogix5730 controller
The typed commands maintain data structure and value.
1
2
3
4
Typed read command
16-bit words in
PLC-5 controller
32-bit words in
DriveLogix5730 controller
The word-range commands fill the destination tag contiguously. Data
structure and value change depending on the destination data type.
Word-range read command
1
2
3
4
1
2
3
4
1
2
3
4