5.2.4 Setting Up the Encoder
Context:
NOTICE
If the selected encoder resolution is below 150 PPR for HTL/TTL encoder, set a feedback filter value in parameter 42-15 Feedback
Filter. The system then calculates an allowed value. This is also the case when using a proximity switch feedback where the
encoder resolution is below 600 PPR.
NOTICE
Depending on the system, a movement can imply different directions for the motor encoder.
NOTICE
Depending on the application, the motor encoder may be connected via a gearbox.
Procedure
1. Select the type of feedback device, either [1] Safe Option or [0] None in parameter 42-10 Measured Speed Source. For SS1 time delay
functionality, no feedback source is necessary.
2. Set the feedback parameters for the safety option.
In closed-loop applications, or if VLT® Sensorless Safety MCB 159 option is used, set parameter 7-00 Speed PID Feedback Source to
[11] MCB 150/151.
3. Set mounting type to Motor shaft mounted or Application mounted.
Select a gear ratio within 0.0001–32.0000 (default 1) in parameter 42-13 Gear Ratio. If the MCB 159 option is used, set the gear ratio
to 1.
4. Set the correct encoder value (1–4096 PPR) in parameter 42-11 Encoder Resolution.
If the MCB 159 option is used, set the correct encoder value to half of the amount of motor pole pairs.
5. Set parameter 42-12 Encoder Direction to [0] Clockwise (default) or [1] Counter clockwise.
If the MCB 159 option is used, select Clockwise.
6. Set parameter 42-14 Feedback Type to [0] With direction info or [1] Without direction info.
Select [1] Without direction info if a VLT® Sensorless Safety MCB 159 option or a proximity switch sensor is used for speed
detection.
5.2.5 Commissioning Test
The MCT 10 Safe Plug-in creates a commissioning report based on the commissioning test result. It generates the drive safety
signature. This function provides a final report when the safety option has been configured. This report is considered as a help tool for
safety commissioning and validates that all the safety functions are operational. The commissioning report can either be printed or
converted into a PDF file.
The test objective is to verify proper implementation (forced dormant error detection measures) and to examine the response of
specific monitoring functions to the explicit input of values outside tolerance limits.
Commissioning
Installation Guide | VLT® Safety Option MCB 150/151
AQ279747441421en-000101 / 130R0292 | 55
Danfoss A/S © 2018.09
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