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Siemens plc 1993
7.4.3 Message Structure – Inverter to Control Device
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Data Byte 2 Data Byte 1
Parameter Number
0 = Absolute Frequency
1 = Percentage Frequency
Toggle Bit
Unused
0 0 0 Parameter in bytes 7 & 8
1 0 1 Parameter limited
1 1 0 Parameter cannot be written
1 1 1 Invalid parameter
0 0 1 Current in bytes 7 & 8
0 1 0 Fault code in bytes 7 & 8
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Data Byte 4 Data Byte 3
Actual Frequency
Absolute 0.0 to 400.0 Hz
Percentage 0.0 to 100.0% of maximum frequency