Menus 15 to 17
SM-Resolver
Parameter
structure
Keypad and
display
Parameter
x.00
Parameter
description format
Advanced parameter
descriptions
Macros
Serial comms
protocol
Electronic
nameplate
Performance RFC mode
274
Unidrive SP Advanced User Guide
www.controltechniques.com Issue Number: 10
When an SM-Resolver is installed the user parameter menu for the module contains all the parameters for a position feedback category Solutions
Module. However, all parameters are not used by this Solutions Module. In the descriptions below only the parameters used by the module are
described.
The update time for some functions are affected by the number of dumb Solutions Modules installed to the drive. The update time for these functions
is the sum of the update times for all dumb Solutions Modules installed to the drive, called the combined update time. The update time for the SM-
Encoder plus and SM-Resolver modules is 4ms, and the update time for the SM-I/O plus is 8ms.
For example, if a module with 4ms update time and a module with 8ms are installed to the drive, then the combined update time for the time critical
parameters of each module is 12ms.
If the module is selected for motor control the position feedback can be used as the reference or feedback source for the position controller within the
drive or with any application within a SM-Applications module. However, if the module is not selected for motor control the speed (Pr
x.03
is always
zero), and the maximum speed must be limited depending on the Solutions Module combined update time so that the resolver position does not
change by more than half an electrical revolution within the sample period. Therefore
Maximum speed (rpm) <0.5 x 60 / Combined update time / (Resolver poles / 2)
e.g with a combined update time of 4ms and a 2 pole resolver the maximum speed is 7500rpm. If this maximum speed is exceeded the resolver
position and freeze position will be incorrect.
Position/speed feedback update rate
If the module is selected for motor control position feedback then the position and speed parameters are updated as defined with each parameter, but
are available within the drive at a faster rate as shown below.
If the module is not selected for motor control position feedback the position and speed are updated as defined with the appropriate parameters.
The menu for the relevant slot appears for the new Solutions Module category with the default parameter values for the new category. When no
Solutions Module is installed in the relevant slot this parameter is zero. When a Solutions Module is installed this parameter displays the identification
code.
101: SM-Resolver
The new parameters values are not stored in EEPROM until the user performs a parameter save. When parameters are saved by the user in the drive
EEPROM the option code of the currently installed Solutions Module is saved in EEPROM. If the drive is subsequently powered-up with a different
Solutions Module installed, or no Solutions Module installed where one was previously installed, the drive gives a Slot.dF or SLot.nf trip.
Provided the set-up parameters for the position feedback are correct this parameter shows the speed in rpm.
Control position
Current controller sample rate
Control speed
250
μ
s
Position controller position (menu 13)
4ms
Position for SM-Applications module, etc.
250
μ
s
x.01
Solutions Module ID code
RO
Uni
PT
US
Ú
0 to 599
Ö
101
Update rate: Write on power-up
x.03
Speed feedback
RO
Bi
FI
NC
PT
Ú
±40,000.0 rpm
Ö
Update rate: 4ms x number of dumb modules
x.04
Revolution counter
RO
Uni
FI
NC
PT
Ú
0 to 65,535 revolutions
Ö
Update rate: 4ms x number of dumb modules
x.05
Position
RO
Uni
FI
NC
PT
Ú
0 to 65,535 (1/2
16
ths
revolutions)
Ö
Update rate: 4ms x number of dumb modules
Summary of Contents for unidrive sp
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