3.39
IDN45 Velocity Data Scaling Factor
The scaling factor for all velocity data in the amplifier. The exponent is defined with
IDN46, so that the LSB weight of all rotational velocity data is derived from the following
equation:
LSB Weight
factor IDN
unit revo
onent IDN
=
·
(
)
(
exp
(
)
45
10
46
lutions
time unit
utes
)
(min
)
ì
í
î
ü
ý
þ
The scaling may be defined within the following range: 1x10
-5
to 1x100. IDN45 and
IDN46 must be integers. If the preferred rotational scaling is selected in IDN44, the veloc-
ity scaling factor (IDN45) and the velocity data scaling exponent (IDN46) will be fixed at
their default values (refer to IDN44). With velocity scaling it is possible to get a rounding
error in the LSBits.
Data Length: 2 bytes
Non-Volatile:
No
Data Type:
Unsigned decimal
Write Access:
CP2, CP3
Minimum:
1
Run-Up Check:
Maximum:
10
-(IDN46)
Cyclic Transfer:
Default:
1
ASCII Param.:
3.40
IDN46 Velocity Data Scaling Exponent
The scaling exponent for all velocity data in the amplifier. Refer to IDN45.
IDN46 = -6 reduces the max. permitted speed to approx. +/-2300rpm (counter over-
flow)
.
Data Length: 2 bytes
Non-Volatile:
No
Data Type:
Signed decimal
Write Access:
CP2, CP3
Minimum:
-6
Run-Up Check:
Maximum:
0
Cyclic Transfer:
Default:
-4
ASCII Param.:
3.41
IDN47 Position Setpoint Value
The master issues position setpoints to the amplifier as cyclic data through IDN47. Posi-
tion setpoints written via the service channel do not have any affect. The “Position
Setpoint Value” has a defined scaling type (IDN76) and a defined resolution (IDN76, 77,
78, 79, 123).
Data Length: 4 bytes
Non-Volatile:
No
Data Type:
Signed decimal
Write Access:
CP4
Minimum:
Run-Up Check:
Maximum:
Cyclic Transfer:
MDT
Default:
ASCII Param.:
Units:
IDN76, 77, 78, 79, 123
Version:
38
sercos
®
for S300/S700
sercos
®
IDN Set
04/2016
Kollmorgen
