Manual – MOVIDRIVE® MDX60B/61B Communication and Fieldbus Unit Profile
89
7
Sequence control
SEW Unit Profile
For safety reasons, the basic control block is defined in such a way that the inverter with
the control word setting 0000
hex
will assume the state
No enable
because all
commercially available fieldbus master systems will reset the ouputs to 0000
hex
in the
event of an error. In this case, the inverter will execute a rapid stop and then activate the
mechanical brake.
7.4.3
Control commands
Controlling the
inverter with bits
0 - 3
If the inverter was enabled at the terminals, it can be controlled with bits 0 - 2, or bits 0 -
3 for applications with speed feedback of the basic control block.
Control command
"Controller inhibit"
You can disable the power output stages of the inverter and set them to high impedance
using the control command
Controller inhibit
. At the same time, the inverter activates the
mechanical motor brake so that the drive will immediately come to a standstill through
mechanical braking. Motors without mechanical brake will coast to standstill when using
this control command.
You activate the control command
Controller inhibit
by setting
bit 0: Controller
inhibit/enable
in the control word because all other bits are not important. This setting
will assign the highest priority to this control bit in the control word.
Control command
"Rapid stop"
Using the
rapid stop
control command lets you have the inverter brake the motor at the
currently applicable rapid stop ramp. The following rapid stop ramps set via parameters
basically take effect:
• P136
T13 stop ramp (with active parameter set 1)
• P146
T23 stop ramp (with active parameter set 2)
The process ramp that may have been set via fieldbus does not affect the rapid stop.
The control command is activated by resetting
bit 1: Enable/rapid stop
.
Bit 3: Hold control / enable
Bit 2: Enable/stop
Bit 1: Enable/rapid stop
Bit 0: Controller inhibit/Enable
Priority
Control
command:
Bit 3
Bit 2
Bit 1
Bit 0
High
.
Controller
inhibit:
X
X
X
1
e.g. B. 01
hex
, 03
hex
,
05
hex
, 07
hex
,
.
.
Rapid stop:
X
X
0
0
e. g. 00
hex
, 04
hex
.
.
Halt:
X
0
1
0
e.g. 02
hex
.
.
Hold control:
1
1
1
0
Only with n-
control/CFC/servo
0E
hex
.
Low
.
Enable:
0
1
1
0
06
hex
X = irrelevant
Summary of Contents for MOVIDRIVE MDX60B
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