Festo EMCA-EC-67 CO Series, Description

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9 Measuring reference system
146 Festo – EMCA-EC-C-HP-EN – 2017-11e – English
FHPP parameter: exponents
The following objects are available for the exponents:
PNU Name Class Type Access Page
600 Position powers of ten exponent
(Position notation index)
Var int8 rw2 303
601 Position unit of measurement
(Position dimension index)
Var uint8 rw2 303
Tab. 9.4 FHPP parameter: exponents
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).
Changes in the objects of the factor group influence the interface units “Speed” [SINC/s],
“Acceleration (Deceleration)” [SINC/s
2
] and “Jerk” [SINC/s
3
].
Example:
Power of 10 exponent (PNU 600) = -7
Basic unit (PNU 601, value = 0x01) = metre
Calculation:
– 1 SINC: 1 * 10
-7
m = 0.1 μm
– 10,000 SINC: 10,000 * 10
-7
m = 1 mm