Curtis 1212S Manual,
Rev. B
17
3 — PROGRAMMABLE PARAMETERS:
Motor Parameters
MOTOR MENU
ALLOWABLE
PARAMETER
RANGE
DESCRIPTION
System Resistance
0 – 800 m
Ω
Sets the system resistance (motor + b connections) used
for load compensation and speed estimation. Control system performance
depends on this parameter being set correctly; it must be set to the actual
cold motor resistance.
For instructions, see initial setup procedure
4
, on page 25.
Resistance Auto Comp
On, Off
Resistance can be automatically measured under a preset low current
before the brake is released. The measured motor resistance plays an
important role in IR compensation.
The Resistance Auto Comp parameter enables/disables this
automatic function.
Auto Comp Current Limit
5 – 50 %
Sets the current limit used for automatic resistance testing, as
a percentage of the Main Current Limit (see Current menu).
Speed Scaler
model specific
The motor speed is proportional to the motor’s back EMF. The Speed
Scaler parameter sets the maximum voltage that the back EMF can
reach.
V
bemf
= V
motor
– I*R
V
motor
= voltage measured between the motor’s two terminals
Allowable Speed Scaler range
1212S-2xxx: 20 – 27 V
1212S-3xxx: 30 – 40 V.
