BEI Sensors MHK5 Absolute Hollow Shaft Encoder - Manual (Page 7)

DEVICE NET USER MANUAL
BEI IDEACOD SAS
Espace Européen de l’Entreprise
9, rue de Copenhague
B.P. 70044 Schiltigheim
F 67013 Strasbourg Cedex
Tél : +33 (0)3 88 20 80 80
Fax : +33 (0)3 88 20 87 87
Mail : [email protected]
Web : www.bei-ideacod.com
3.1.3. Total resolution
This value is used to program the desired num-
ber of measuring steps over the total measur-
ing range. This value must not exceed the total
resolution of the encoder with 24 bit =
16,777,216 steps (25 bit = 33,554,432 steps). Please note the
value written on the type shield.
Attribute ID Default value Value range Data Type
72 hex (*) 0h - 2,000,000h Unsigned Integer 32
(*) see type shield
Maximum total resolution
24 Bit Encoder: 1,000,000 hex
25 Bit Encoder: 2,000,000 hex
Attention:
The following formula letters will be used:
-
PGA Physical total resolution of the en-
coder (see type shield)
-
PAU Physical resolution per revolution
(see type shield)
-
GA Total resolution (customer parame-
ter)
-
AU Resolution per revolution (customer
parameter)
If the desired resolution per revolution is less
than the physical resolution per revolution of
the encoder, then the total resolution must be
entered as follows:
Total resolution
GA = PGA * AU / PAU, if AU < PAU
Example: Customer requirement: AU = 2048,
Encoder type shield: PGA=24 bit, PAU=12 bit
GA = 16777216 * 2048 / 4096
GA = 8388608
If the total resolution of the encoder is less than
the physical total resolution, the parameter
total resolution must be a multiple of the
physical total resolution:
-
k = PGA / GA
-
k = integer
3.1.4. Preset value
The preset value is the desired position value,
which should be reached at a certain physical
position of the axis. The position value of the
encoder is set to the desired process value by
the parameter preset. The preset value must
not exceed the parameter total measuring
units
Attribute ID
Default
value
Value range Data Type
73 hex 0 hex
0hex - total measuring
range
Unsigned Integer 32
Version 05/04 UME-OCD-D2 Page 7