Modbus RTU Protocol E-3
Writing (06) Logic Command Data
The PowerFlex 400 drive can be controlled via the network by sending
Function Code 06 writes to register address 8192 (Logic Command).
P036 [Start Source] must be set to 5 “RS485 (DSI) Port” in order to
accept the commands.
Writing (06) Reference
The Speed Reference to a PowerFlex 400 drive can be controlled via the
network by sending Function Code 06 writes to register address 8193
(Reference). P038 [Speed Reference] must be set to 5 “RS485 (DSI)
Port” in order to accept the Speed Reference.
Logic Command
Address (Decimal) Bit(s) Description
8192
0 1 = Stop, 0 = Not Stop
1 1 = Start, 0 = Not Start
2 1 = Jog, 0 = No Jog
3 1 = Clear Faults, 0 = Not Clear Faults
5,4
00 = No Command
01 = Forward Command
10 = Reverse Command
11 = No Command
6 1 = Local Control
(1)
, 0 = Comm Control
(1)
Local Control causes the drive to use C108 [Start Source 2] and C109 [Speed Ref 2] for start and
speed reference control.
7 1 = MOP Increment, 0 = Not Increment
9,8
00 = No Command
01 = Accel Rate 1 Enable
10 = Accel Rate 2 Enable
11 = Hold Accel Rate Selected
11,10
00 = No Command
01 = Decel Rate 1 Enable
10 = Decel Rate 2 Enable
11 = Hold Decel Rate Selected
14,13,12
000 = No Command
001 = Freq. Source = P038 [Speed Reference]
010 = Freq. Source = A142 [Internal Freq]
011 = Freq. Source = Comms (Addr 8193)
100 = A143 [Preset Freq 0]
101 = A144 [Preset Freq 1]
110 = A145 [Preset Freq 2]
111 = A146 [Preset Freq 3]
15 1 = MOP Decrement, 0 = Not Decrement
Reference
Address (Decimal) Description
8193
A decimal value entered as xxx.xx where the decimal point is fixed. For
example, a decimal “1000” equals 10.00 Hz and “543” equals 5.43 Hz.
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