Rockwell Automation 1769-SM2 Compact I/O DSI/Modbus Communication Module - Manual (Page 120)

7-18 CompactLogix Example Ladder Programs
Figure 7.6 Example CompactLogix Multi-Drive Ladder Logic CH1 Drive 0 Subroutine (Continued)
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 /
CH1_Drv0_Valid_Data
U
CH1_Drv0_Start
i
8
CH1_Drv0_Start
CH1 Drv0
Logic Command
Bit 01
Local:1:O.Data[1].1
9
CH1_Drv0_Jog
CH1 Drv0
Logic Command
Bit 02
Local:1:O.Data[1].2
10
CH1_Drv0_Clear_Fault
CH1 Drv0
Logic Command
Bit 03
Local:1:O.Data[1].3
11
CH1_Drv0_Forward_Cmd
CH1 Drv0
Logic Command
Bit 04
Local:1:O.Data[1].4
12 /
CH1_Drv0_Forward_Cmd
CH1 Drv0
Logic Command
Bit 05
Local:1:O.Data[1].5
This rung displays the Reference being sent to 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.
13 Move
Source CH1_Drv0_Reference
100
Dest Local:1:O.Data[2]
100
MOV
CH1 Drv0
Reference Word
These rungs send an explicit message to the 1769-SM2 to read/write Parameter 78 [Jog Frequency].
14
CH1_Drv0_Read_Param
EN
DN
ER
Type - CIP Generic
Message Control CH1_Drv0_Read_Msg ...
MSG