Danfoss MCO 305 Design Manual page 230

MCO 305 Design Guide
It is possible to clear a software limit error and
then drive in the opposite direction. If you try
again to move in the wrong direction, then the
error 198 occurs. In this case, it is necessary to
move the drive by hand back to the admissible
area and to erase the error, or in the menu
Controller → Parameters → Axis to temporarily turn
off the corresponding Software End Limit and then
delete the error.
The behavior in case of limit switches is improved
starting with MCO 5.00.
33-44 Positive Software End Limit Active
SWPOSLIMACT
Option
Inactive
Active
Function
By setting this parameter to [1] the FC300 is infor-
med that the Positive Software End Limit is to be
monitored. In this case it is checked whether the
target position is located outside of the permissible
movement range during every movement. If neces-
sary an error message is issued and the drive con-
trol is switched off.
In the positioning mode this means that the corres-
ponding positioning process is not started and the
error can be cleared with the ERRCLR command.
In the synchronizing and speed mode an error can
only be recognized after the limit has been excee-
ded, thus when the error message is issued the
drive is already outside of the permissible area of
movement. In this case, it is necessary to move
the drive, by hand, back to the admissible area,
and to erase the error to temporarily turn off the
corresponding Software End Limit and then delete
the error.
It is possible to clear a software limit error and
then drive in the opposite direction. If you try
again to move in the wrong direction, then the
error 198 occurs. In this case, it is necessary to
move the drive by hand back to the admissible
area and to erase the error, or in the menu
Controller → Parameters → Axis to temporarily turn
off the corresponding Software End Limit and then
delete the error.
Improved behavior in case of limit switches is
available starting with MCO 5.00.
default setting
230
__ Parameter Reference __
[0]
[1]
[ ] value for use in communication via serial communication port
®
MG.33.L5.02 – VLT is a registered Danfoss trademark
33-45 Time in Target Window
TESTTIM
Range [Unit]
0 – 10 [ms]
Function
Once the target window has been reached the posi-
tion is read twice and compared with the par. 33-
46 TESTVAL. If the result is less than TESTVAL,
then the position has been reached, otherwise a
new reading is taken. TESTTIM indicates the time
interval between the measurements.
NB!:
The reason for the limitation to 10 ms is
to be seen, that the function diffval waits
really and in this time the monitoring of
the limit switch and the position error is not active.
For this reason the value should be not too long.
33-46 Target Window Limit Value
TESTVAL
Range [Unit]
1 – 10000 [qc]
Function
Once the target window has been reached the posi-
tion is read twice with an interval of par. 33-45
TESTTIM and the interval is compared with the
Target Window Limit Value.
The result determines whether the position is
viewed as having been reached or not.
NB!:
For longer time intervals it must be taken
into consideration that reaching this
target position will be delayed by this
amount of time in any case.
0
1