Rockwell Automation 1336T ControlNet Frn1.02 Rev 1.5 User Manual

Page 130

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5–3

Understanding the Resources of Your Drive

Publication 1336 FORCE–5.18 ––March, 1999

The channel is accessed through parameter 367 (ChA Logic Cmd
In). This parameter has the same bit definitions as the Logic
Command.

Important: In the PLC controller, internal bit numbering is 0

through 15 decimal and I/O bit numbering is 0 through
17 octal. However, bit numbering in the drive
parameters, including ChA Logic Cmd In, is 0 through
15 decimal. You should keep this in mind when
working with the Logic Command.

For example, if you want to set the Ramp Disable bit in the Logic
Command (bit 9 decimal), you would need to set bit 11 (octal) in
your PLC program.

If you select the external speed reference, the PLC controller must
send a 16-bit word to parameter 101, Velocity Reference 1 HI, in the
drive. Because the speed reference is a complete 16-bit word, the
PLC controller must send the data as a complete word rather than as
individual bits as was the case for logic command bits.

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