6.5 Channel 1: Interface X7
Image 6.2: Encoder configuration Channel Ch1 (Interface X7) screen
This screen is used to select the encoder for channel Ch1. This channel uses the
encoder’s “main interface” to measure position changes periodically and add them
up cyclically – this is referred to as “cyclical evaluation”.
Encoders with a main interface that only makes it possible to measure the cyclical
position incrementally often feature an additional absolute value interface referred to
as an “auxiliary interface”. For this interface, the absolute position is measured once
during the initialization phase and is then used for absolute value initialization
purposes.
MOOG
ID No.: CB40859-001 Date: 11/2020
MSD Servo Drive - Device Help
59
6 Encoder
Select from database
Clicking on this button will open a menu that can be used to select encoders. The
data sets for Moog encoders will already be available there by default.
Encoder name
You can use this field to enter your own information for describing the encoder
(maximum 31 characters) (P 555[0] - ENC_CH1_Info).
Cyclic position via
This drop-down menu is used to select the “main interface” (P 505[0] - ENC_CH1_
Sel).
Pulses per revolution
Once SINCOS(1), TTL(3) or HALL(5) is selected as the “main interface,” this field will
appear so that you can enter the number of analog Sin/Cos lines per revolution (TTL
lines as well).
Absolute interface
This drop-down menu is used to select the “auxiliary interface” (P 540[0] - ENC_
CH1_Abs).
NOTE
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Selecting an “auxiliary interface” is redundant if, for example, SSI
(2) is selected as the “main interface” (corresponds to cyclical
evaluation via SSI). In this case, the absolute value initialization
will also be carried out via the SSI interface, regardless of the
selected “auxiliary interface”.
Gear ratio
These fields can be used to define a gear ratio for the encoder (in the output side).
For details see Section "Encoder gearing" on page 89.
