172 Rockwell Automation Publication 22C-UM001J-EN-E - January 2017
Appendix E Modbus RTU Protocol
Reading (03) Logic Status
Data
The PowerFlex 400 Logic Status data can be read via the network by sending
Function Code 03 reads to register address 8448 (Logic Status).
Reading (03) Feedback
The Feedback (Output Frequency) from the PowerFlex 400 drive can be read
via the network by sending Function Code 03 reads to register address 8451
(Feedback).
Reading (03) Drive Error
Codes
The PowerFlex 400 Error Code data can be read via the network by sending
Function Code 03 reads to register address 8449 (Drive Error Codes).
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.
Logic Status
Address (Decimal) Bit(s) Description
8448 0 1 = Ready, 0 = Not Ready
1 1 = Active (Running), 0 = Not Active
2 1 = Cmd Forward, 0 = Cmd Reverse
3 1 = Rotating Forward, 0 = Rotating Reverse
4 1 = Accelerating, 0 = Not Accelerating
5 1 = Decelerating, 0 = Not Decelerating
6 1 = Alarm, 0 = No Alarm
7 1 = Faulted, 0 = Not Faulted
8 1 = At Reference, 0 = Not At Reference
9 1 = Reference Controlled by Comm
10 1 = Operation Cmd Controlled by Comm
11 1 = Parameters have been locked
12 Digital Input 1 Status
13 Digital Input 2 Status
14 Digital Input 3 Status
15 Digital Input 4 Status
Feedback
(1)
(1) Returns the same data as Reading (03) Parameter b001 [Output Freq].
Address (Decimal) Description
8451 A xxx.xx decimal value where the decimal point is fixed.
For example, a decimal “1234” equals 12.34 Hz and “300” equals 3.00 Hz.
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