PROFINET IO – Communication profiles 315
Actual values
Actual values are 16-bit or 32-bit words containing information on
the operation of the drive. The functions to be monitored are
selected with a drive parameter.
Actual values in speed control mode
The scaling of 16-bit actual speed values (ACT or NIST_A) in
hexadecimal (0…4000h) corresponds to 0…100% of the maximum
reference (as defined with a drive parameter, for example, speed
scaling in ACSM1, ACS850, ACQ810, ACS880 and ACS580, and
external reference in ACS355).
The scaling of 32-bit actual speed values (NIST_B) in hexadecimal
(0…4000 0000h) corresponds to 0…100% of the maximum
reference (as defined with a drive parameter, for example, speed
scaling in ACSM1, ACS850, ACQ810, ACS880 and ACS580, and
external reference in ACS355).
Actual values in positioning mode (ACSM1 only)
For a 32-bit actual position value (XIST_A), the unit and scaling
are defined with drive parameters (for example, POS UNIT,
POS2INT SCALE and FEED CONST).
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