Danfoss MCO 351, Operating Instructions Manual, Page: 44 / 58

6 Application Examples
6.1 Homing
Function Digital control
mode Fieldbus
mode Quick bus
(Fieldbus mode)
Homing IN 9 PCD[1].3 PCD[1].3
Clear home
status IN 6 PCD[1].6 PCD[1].6
Table 6.1 Homing Signals
NOTICE
Connect the homing switch to IN 4 and select the
sequence in parameter
33-04 Behaviour during Home
Motion .
6.2 Touch Probe Positioning
The target position is calculated relative to the actual
position, after the touch probe input is activated.
Similar configuration like relative/absolute positioning, but:
Parameter
19-28 Index Trajectory Type must be either
positive (2) or negative (3)
By using quick bus: PCD[1].13 (positive) / PCD[1].14
(negative)
Parameter 19-03 Touch Probe Delay in ms.
Operating mode
Function Digital
control mode Fieldbus
mode Quick bus
(Fieldbus
mode)
Start positioning IN 5 PCD[1].5 PCD[1].1
Position reached OUT 2 PCD[1].2 PCD[1].2
Reset touch
probe IN 7 PCD[1].7 PCD[1].7
Table 6.2 Operating Mode
6.3 Brake Control
Important parameters:
•
19-09 Automatic Break Control
•
19-10 Coast Delay
•
19-11 Brake Delay
•
19-12 Hold Delay
•
19-13 Brake Wear Limit
If the application is not equipped with an electrome-
chanical brake, these parameters are not relevant.
However, it is important to set parameter
19-09 Automatic
Brake Control to [0] Disabled to enable the motor also at
standstill.
Start procedure:
After start positioning is activated, the mechanical brake is
opened after the time selected in 19-11 Brake Delay . This
time delay is to ensure that the motor is fully magnetised
when the brake is released, preventing the load from
dropping after start.
130BB996.10
Time
Time defined in P 19-11
Start magnetizing the
motor [MOTOR ON]
Brake closed
Start
Start positioning
Brake opened
Illustration 6.1 Brake Delay
Stop procedure:
At position reached the delay selected in 19-10 Coast Delay
ensures that the brake is closed when the controller coasts
the motor.
130BB997.10
Time
Time defined in P 19-11
Position reached
Motor stop - Brake closed
Stop
Motor
demagnetized
Illustration 6.2 Coast Delay
Application Examples Operating Instructions
42 Danfoss A/S © 04/2014 All rights reserved. MG33R302
6 6