Lenze 931M Series, Communications Manual

Page: 103 / 158

Device control
State diagram
Controller state
8

103
KHB 13.0003-EN 2.0
8.1.6 Controller state
Just as different status transitions can be activated by combining several bits of the control
word , it is possible to read the current controller status by combining different bits of the
status word .
The following table lists the possible states of the status diagram and the bit combinations
which are used to display the states in the status word .
Status Bit 6 Bit 5 Bit 3 Bit 2 Bit 1 Bit 0 Mask Value
0040
h
0020
h
0008
h
0004
h
0002
h
0001
h
Not_Ready_To_Switch_On 0 X 0 0 0 0 004F
h
0000
h
Switch_On_Disabled 1 X 0 0 0 0 004F
h
0040
h
Ready_to_Switch_On 0 1 0 0 0 1 006F
h
0021
h
Switched_On 0 1 0 0 1 1 006F
h
0023
h
Operation_Enable 0 1 0 1 1 1 006F
h
0027
h
Fault 0 X 1 1 1 1 004F
h
000F
h
Fault_Reaction_Active 0 X 1 1 1 1 004F
h
000F
h
Quick_Stop_Active 0 0 0 1 1 1 006F
h
0007
h
Tab. 14 Controller status
X not relevant
Example:
The above example shows which bits must be set in the control word to enable the
controller. Now, the new status is to be read from the status word :
Transition from Switch_On_Disabled to Operation_Enable :
1. Write status transition 2 to control word .
2. Wait until the status Ready_To_Switch_On is displayed in the status word .
Transition 2: Control word = 8006
h
, wait until (status word + 006F
h
) = 0021
h
is
displayed
1)
3. Status transitions 3 and 4 can be combined and written to the control word .
4. Wait until the status Operation_Enable is displayed in the status word .
Transition 3 and 4: Control word = 800F
h
, wait until (status word + 006F
h
) = 0027
h
is
displayed
1)
The example is based on the assumption that no other bits are set in the control word (only
bits 0 ... 3 are required for the status transitions).
1) Bits which are not set also must be evaluated for the status identification (see table). Therefore, the status word
must be masked accordingly.