Rockwell Automation 1756-DMF30 ControlLogix Drive Module - Manual (Page 47)

Publication 1756-UM522B-EN-P - February 2003
Configuring the Drive Module 5-3
•
If a Drive module does not receive data (e.g. the first module in
a non-loop topology), you must choose the
No Receive Data
Receive Port communication format.
•
If a Drive module does not transmit data (e.g. an end node in
the daisy chain configuration or star), you must choose the
No
Transmit Data Transmit Port communications format.
•
The receive communication format for any SynchLink node that
receives data must match the transmit communications format of
the previous node in the system.
Receive Port Communications Formats
The following communications formats are available for the receive
port of your Drive module:
•
2 Direct Words, 18 Buffered - Data updated every 500
µ
S
•
4 Direct Words, 18 Buffered - Data updated every 500
µ
S
•
4 Direct Words, 8 Buffered - Data updated every 500
µ
S
•
No Receive Data - Data updated every 500
µ
S
Transmit Port Communications Formats
The following communications formats are available for the transmit
port of your Drive module:
•
2 Direct Words, 18 Buffered - Data updated every 500
µ
S
•
4 Direct Words, 18 Buffered - Data updated every 500
µ
S
•
4 Direct Words, 8 Buffered - Data updated every 500
µ
S
•
No Transmit Data - Data updated every 500
µ
S
IMPORTANT
The update times referenced above are for data
updates across the SynchLink fiber optic cable only
and do not represent full processing time. Refer to
3-5 for more information regarding data updates and
processing times.