Danfoss MCO 305 Design Manual page 212

MCO 305 Design Guide
32-68 Reverse Behavior for Slave
REVERS
Option
Reversing allowed
Reversing only allowed when master
is reversed
Reversing blocked
Function
REVERS determines the behavior while moving in
reverse (moving in a negative direction): whether
reverse is allowed, only allowed when the master is
reversed or not allowed in general.
The corresponding restriction is always valid, i.e.
for the drive synchronization (SYNCP, SYNCV,
SYNCM, SYNCC, etc.), for positioning commands
(POSA, POSR), the speed command (CVEL), and
also for a test run with the Oscilloscope.
In order to prevent automatic reversing during the
Testrun adjust the value to 1 or 2.
32-69 Sampling Time for PID control
TIMER
Range [unit]
1 – 1000 [ms]
Function
The TIMER parameter determines the sampling
time of the position control algorithm. For example,
increase the value of the factory settings
– for very low pulse frequency, such as from 1 to
2 qc per sampling time. You need at least 10 to
20 qc per sampling time.
– Or for very slow systems with a long dead time.
If 1 ms is used here for control, large motors will
vibrate.
Accordingly, the value should not be set higher
than 1000 (= 1 s). This would be a very slow
control.
NB!:
Note that is has a direct effect on the PID
loop e.g. if you double the TIMER the par.
32-60 Proportional Factor has twice the
effect.
default setting
212
__ Parameter Reference __
[0]
[1]
[2]
1
[ ] value for use in communication via serial communication port
®
MG.33.L5.02 – VLT is a registered Danfoss trademark
32-70 Scan Time for Profile Generator
PROFTIME
Option
1 ms
2 ms
3 ms
4 ms
5 ms
Function
The Parameter gives the possibility to set the
sample time for the profile generator, which is
independent of the sample time for the PID
controller.
For demanding control tasks in the background
(SYNCP, SYNCM, SYNCC), the execution time of the
APOSS program may rise drastically. In such cases,
the scan time of the profile generator can be in-
creased to [2] in order to have more time available
for the APOSS program. Values higher than 2 ms
provide hardly any benefits.
NB!:
The VEL, ACC, and DEC has to be set
after a SET PROFTIME command.
32-71 Size of the Control Window (Activation)
REGWMAX
Range
0 – MLONG [qc]
Function
The parameters REGWMAX and REGWMIN are used
to turn the position control within defined areas
(control windows) on and off: REGWMAX indicates
the size of the window outside of which the control
should begin again.
[1]
[2]
[3]
[4]
[5]
0