Curtis 1253 - Final Add Mode; Fig. 13: Speed Conditioning

Curtis 1253 Manual, Rev. F
23
Blue Ox Rev. A, draft #1 [3 August 2007]
3 — PROGRAMMABLE PARAMETERS: Final Speed Request Parameters
If Final Add Mode is programmed On, the controller will sum the two requests
(up to 100% output). e “final” speed request that is sent to the motor is, of
course, temporary—the final request is constantly recalculated in response to
changes in the inputs.
Speed conditioning is shown in detail in Figure 13.
Fig. 13 Speed conditioning diagram.
0 0.5 1
1
Final
“First On”
Final Motor Speed Request
The 1253 handles multiple speed requests according to how the Speed Select (SS) Add Mode
and Final Add Mode parameters are set.
The SS Add Mode parameter determines how SS switch requests are handled:
ON = multiple SS requests are summed.
OFF = first SS request locks out any additional ones.
The Final Add Mode parameter determines whether the final throttle request and final SS request
are summed (Final Add Mode ON) or lock each other out (Final Add Mode OFF).
SS
“First On”
100%
SS Switch Conditioning
SS
Add Mode
On/Off
Final SS Request
Final Throttle Request
Throttle Conditioning
Throttle
Thrtl Max Spd
Throttle Map
Final
Add Mode
On/Off
Min Speed
100%
OFF ON
SS1
SS1 Speed
SS2 Speed
SS3 Speed
SS4 Speed
SS2
SS3
SS4
Σ
Σ
Σ
100%
ON
OFF