Rockwell Automation 22B PowerFlex 4/40 Custom FW, DB-Modbus Enhancement - Manual (Page 2)

A.1 PLC Read Registers - Output from Drive
Register (ID) Name Type Range
2048 Logic Status Word Binary Binary defined (A.2)
2049 Reserved Integer 16 bit
2050 Reserved Integer 16 bit
2051 Output Frequency (Feedback) Integer 16 bit 0..240.00 Hz
2052 Output Speed (Feedback) Integer 16 bit 0..10000 RPM
2053 Output Current Integer 16 bit 0..99.9 A
2054 Heat Sink Temperature Integer 16 bit 0..120°C
2055 Motor Power Integer 16 bit 0..99.99kW
2056 Output Voltage Integer 16 bit 0..999.9 V
2057 Energy Integer 16 bit 0..65535kWh
2058 Drive Error (same as D007) Integer 16 bit 0..122
Note: All values are without sign. The Modbus values have there decimal point adjusted as
defined in the table and not as defined in the standard instruction manual.
A.2 Definition for the Logic Status Word
Bit 15 – 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Not used Running at
Zero Speed
At Freq Alarm Faulted Running +
Backward
Running Ready
Detailed bit description:
Running at Zero Speed
Bit = 1 when speed is below 2% of max frequency
At Freq Bit = 1 when output frequency reached frequency command.
Alarm Bit = 1 when alarm is active
Faulted Bit = 1 when drive has tripped on fault.
Running + Backward Bit = 1 when running backwards
Running Bit = 1 when running
Ready Bit = 1 when ready and accepting frequency commands.
A.3 PLC Write Registers - Input to Drive
Register (ID) Name Type Range
2000 Logic Control Word Binary 16 bit Binary defined (A.4)
2001 Reserved Binary 16 bit
2002 Frequency Command relative to P035 Integer 16 bit 0..100.00% Fmax
2003 Reserved for customer, not used in the drive Integer 16 bit
2004 Reserved for customer, not used in the drive Integer 16 bit
2005 Reserved for customer, not used in the drive Integer 16 bit
2006 Reserved for customer, not used in the drive Integer 16 bit
The first register 2000 is used for the “Logic Control Word” and the register 2002 for the
“Frequency (Speed) Command”. The following up 4 registers from 2003 to 2006 are especially
reserved for the customer and are not used in the drives but external.
PowerFlex 4/40 Custom Firmware 2