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Application Examples
6 Application Examples
6.1 Homing
Function
Homing
Clear home
status
Table 6.1 Homing Signals
NOTICE
6
6
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
Start positioning IN 5
Position reached OUT 2
Reset touch
probe
Table 6.2 Operating Mode
42
Digital control
Fieldbus
mode
mode
IN 9
PCD[1].3
IN 6
PCD[1].6
Digital
Fieldbus
control mode
mode
PCD[1].5
PCD[1].2
IN 7
PCD[1].7
Danfoss A/S © 04/2014 All rights reserved.
Operating Instructions
6.3 Brake Control
Important parameters:
Quick bus
(Fieldbus mode)
•
PCD[1].3
PCD[1].6
•
•
•
•
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.
Time
Quick bus
(Fieldbus
mode)
PCD[1].1
Illustration 6.1 Brake Delay
PCD[1].2
PCD[1].7
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.
Time
Illustration 6.2 Coast Delay
19-09 Automatic Break Control
19-10 Coast Delay
19-11 Brake Delay
19-12 Hold Delay
19-13 Brake Wear Limit
Start
Time defined in P 19-11
Start magnetizing the
Start positioning
motor [MOTOR ON]
Brake opened
Brake closed
Stop
Time defined in P 19-11
Position reached
Motor
Motor stop - Brake closed
demagnetized
MG33R302
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