Modbus Instruction manual 7505/08
05/08
Modbus Instruction manual 75
10.2.2 Behavior in transition 5
The behavior in transition 5 from "Operation enabled" to "Switched on" can be param-
eterized. The behavior is set via parameter
State transition 5 392.
Parameter Setting
No. Description Min. Max. Fact. sett.
392 State transition 5 0 2 2
Operation mode Function
0 - Coast to stop
immediate transition from "Operation enabled“ to
"Switched on“, free stoppage of the drive
1 - DC brake
activation of DC brake, with the end of DC braking, there
is the change from "Operation enabled“ to "Switched on“
2 - Ramp
transmission with normal stop ramp, after reaching stand-
still, there is a change from "Operation enabled“ to
"Switched on“
Note: Setting operation mode "1 - DC brake“ is only possible in applications with
v/f characteristic (e.g. configuration 110), as other applications do not
know such an operation mode.
If the frequency inverter is operated with a confi
guration which does not
know the DC braking operation mode (e.g. configuration 210, field-
orientation speed controlled), value "1" cannot be set. It is also not of-
fered in the selection menus of the KP500 control unit or the VPlus pro-
gram.
Note: The default value for the parameter State transition 5 392 is operation
mode "2 – Ramp". For configurations with torque control, the default
value is operation mode "0 - Coast to stop". In a switch-over of the con-
figuration, the setting value for
State transition 5 392 is also altered if
necessary.
Note: The “behavior in transition 5” is only relevant for non motion control con-
figurations (
Configuration 30 ≠ x40).
If transition 5 has been triggered with State transition 5 392 = "1 - DC brake“, a new
control word is only accepted after the completion of the transition process. The
change of state from "Operation enabled“ to "Ready“ is done after the expiry of the
time
Braking time 632 parameterized for the DC brake.
If the parameter State transition 5 392 = "2 - Ramp“ has been set, the
controlword
can be set back to “Enable operation” during the stoppage of the drive. In this way,
the drive runs back up to its set reference value and remains in the state "Operation
enabled“.
The change of state from "Operation enabled“ to "Switched on“ is done after the set
switch-off threshold has been reached and expiry of the set holding time (equivalent
to the behavior in a quick stop). In this, the parameters
Switch-off threshold
637
(percent of fmax) and
Holding time 638 (holding time after switch-off threshold
reached) are relevant.
To Next Page
