Rockwell Automation 1769-SM2 Compact I/O DSI/Modbus Communication Module User Manual
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ControlLogix w/1769-ADN DeviceNet Example Ladder Program
8-17
Figure 8.20 Example ControlLogix Ladder Logic CH2 Subroutine
1769-SM2 Channel 2 Subroutine
The following rungs display some of the Logic Status bits from the drive. Refer to Appendix D in the 1769-SM2 user manual
for additional information about the Logic Status word.
0
SM2_Input_Data[5].0
CH2_Ready
1
SM2_Input_Data[5].1
CH2_Active
2
SM2_Input_Data[5].3
CH2_Forward
3
SM2_Input_Data[5].7
CH2_Fault
4
SM2_Input_Data[5].8
CH2_At_Speed
This rung displays the Feedback from the drive. An integer represents the xxx.x Hz format (decimal is implied) used by the
drive, so a displayed value of "300" equates to 30.0 Hz.
5
Move
Source SM2_Input_Data[6]
200
Dest
CH2_Feedback
200
MOV
The following rungs display some of the Logic Command bits sent to the drive. Refer to Appendix D in the 1769-SM2 user
manual for additional information about the Logic Command word.
6
CH2_Stop
SM2_Output_Data[3].0
i
This rung unlatches the contact that turns on the Start command when the drive is not communicating with the 1769-SM2.
This prevents the drive from immediately starting when communications are restored. If an immediate start is desired for an
application, this rung could be deleted.
7
/
CH2_Valid_Data
U
CH2_Start
i
8
CH2_Start
SM2_Output_Data[3].1
9
CH2_Jog
SM2_Output_Data[3].2
10
CH2_Clear_Fault
SM2_Output_Data[3].3