Lika SMAX-AI1-PRG-L2, Руководство пользователя

Страница: 63 / 84

SMAX MODBUS®
equal to the maximum number of information for the default resolution - 1
(2
13
-1 = 8,191).

If the
Scaling function
is enabled (bit 0 in the register
Operating
parameters [0003 hex]
= 1),
Preset value [0001 hex]
must be lower than
or equal to the maximum number of information for the custom resolution
- 1 (for instance -see the example on page 60: 2,000 information, number of
bits = 11, the max. value you are allowed to enter for the Preset is: 2
11
-1 =
2,047).
WARNING
After having entered a new value in the
Resolution [0000 hex]
register it is
compulsory to check the
Preset value [0001 hex]
and then perform a homing
operation (bit 11
Perform counting preset
in
Control Word [000A hex]
= 1).
Offset value [0002 hex]
[Register 3, Unsigned16, ro]
As soon as you send the
Perform counting preset
command (see bit 11 in
Control Word [000A hex]
), the current position of the encoder is saved in this
register. The offset value is then used in the preset function in order to calculate
the encoder position value to be transmitted. To zero set the value in this
register you must upload the factory default values (see bit 10,
Load default
parameters
command, in
Control Word [000A hex]
on page 67).
For any further information on the preset function and the meaning and use of
the related registers and commands
Preset value [0001 hex] , Offset value
[0002 hex] and Perform counting preset refer to page 61.
Default = 0 (min. = 0, max. = 8191)
Operating parameters [0003 hex]
[Register 4, Unsigned16, rw]
Byte structure of the
Operating parameters [0003 hex]
register:
byte
MSB LSB
bit 15 … 8 7 … 0
msb lsb msb lsb
MAN SMAX MB E 1.2 Programming parameters 63 of 84