Festo CMMO-ST-C5-1-LKP, Оригинальное руководство пользователя

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A Technical appendix
Festo – GDCP-CMMO-ST-LK-C-HP-EN – 2017-05b – English 81
A Technical appendix
A.1 Increments
A.1.1 Encoder increments [EINC]
The motor controller works with encoder increments [EINC] in the drive control area (e.g. in the path
generator).
A.1.2 Interface increments [SINC]
In contrast, so-called interface increments [SINC] are used at all user interfaces and in the area of in­
ternal data management. This avoids rounding errors when writing and reading values.
Size of a SINC
Interface increments are at first dimensionless, i.e, they have no defined unit or size. The unit, that is,
the size of the interface increment (SINC), is established in the factor group object (powers of ten expo­
nent PNU 600 and unit of measurement PNU 601):
Factor group objects (Factor Group)
Name PNU Object Type Access
Position powers of ten exponent
(Position Notation Index)
600 Var int8 rw2
Position unit of measurement
(Position Dimension Index)
601 Var uint8 rw2
Tab. A.1 Factor group overview
During parameterisation in FCT, you can use commonly used units for length specifica­
tions, such as millimetres or inches. You do not need any interface increments here.
Parameterise the drive completely in FCT and then read the objects of the factor group
(powers of ten exponent PNU 600 and unit of measurement PNU 601).
Example:
Powers of ten exponent PNU 600 = -7
Unit of measurement PNU 601 = metre (0x01)
Calculation:
– 1 SINC: 1 * 10
-7
m = 0.1 μm
– 10,000 SINC: 10,000 * 10
-7
m = 1 mm