Rockwell Automation 20-COMM-H RS485 HVAC Adapter FRN 2.xxx - Manual (Page 38)

4-6 Using Modbus RTU
20-COMM-H RS-485 HVAC Adapter User Manual
Publication 20COMM-UM009D-EN-P
Table 4.E shows that there are 16 discrete points to represent the command
word bit by bit. These points can be used only for writing single-bit
commands.
Table 4.E Logic Command: Discrete Outputs (to Drive from Controller)
Modbus
Address Logic Command
Bit PowerFlex 70/700 Example
Description
Values
0x0001 0 Stop 0 = Not Stop
1 = Stop
0x0002 1 Start (1) (2)
(1) A 0 = Not Stop condition (logic 0) must first be present before a 1 = Start condition will start the drive.
(2) To perform this command, the value must change from “0” to “1.”
0 = Not Start
1 = Start
0x0003 2 Jog 0 = Not Jog
1 = Jog
0x0004 3 Clear Faults
(2)
0 = Not Clear Faults
1 = Clear Faults
0x0005 4 Direction Modbus Address
0x0006 5 06 05
0 0 = No Command
0 1 = Forward Command
1 0 = Reverse Command
1 1 = Hold Direction Control
0x0007 6 Local Control 0 = No Local Control
1 = Local Control
0x0008 7 MOP Increment 0 = Not Increment
1 = Increment
0x0009 8 Accel Rate Modbus Address
0x0010 9 10 09
0 0 = No Command
0 1 = Accel Rate 1 Command
1 0 = Accel Rate 2 Command
1 1 = Hold Accel Rate
0x0011 10 Decel Rate Modbus Address
0x0012 11 12 11
0 0 = No Command
0 1 = Decel Rate 1 Command
1 0 = Decel Rate 2 Command
1 1 = Hold Decel Rate
0x0013 12 Reference Select Modbus Address
0x0014 13 15 14 13
0x0015 14 0 0 0 = No Command
0 0 1 = Ref 1 (Ref A Select)
0 1 0 = Ref 2 (Ref B Select)
0 1 1 = Ref 3 (Preset 3)
1 0 0 = Ref 4 (Preset 4)
1 0 1 = Ref 5 (Preset 5)
1 1 0 = Ref 6 (Preset 6)
1 1 1 = Ref 7 (Preset 7)
0x0016 15 MOP Decrement 0 = Not Decrement
1 = Decrement