Host computer control
word 1 enable
Selection bit of host computer control word 1
Host computer control
word 1 disable
Selection bit of main reference
Selection bit of fault reset
Notes：
1. The host computer control word(control word1 and control word 2) is enable when set “Methods of inputting
operating commands” to “communication control”.The control word 1 is enable when the bit7 of control word 1
is enable.And bit5~bit0 are enable when the bit6 of control word 1 is enable.
2. Processing of fault and alarm in host computer：when VFD is failure,all the command of control word 1 and
control word 2,except fault reset command,are disable,it need to reset fault firstly before sending other
commands.When the alarm happens,the control words is still enabled.
The bits definitions of control word 2 are shown as follows：
Selection bit for VFD operation
enable/disable
Running(The direction refer to function code)
Other operation status(Refer to control word 1)
Auxiliary reference enable
The selection bit for auxiliary
reference frequency.
Auxiliary reference disable
The control word 2 enable
The selection bit for control
word 2.
The control word 2 disable
Notes：
control word 2 is enabling when the bit3 of control word 2 is enable.
2). Status parameters
VFD operation status word 1
Current main reference value
Current operating frequency
Current operating frequency
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