Curtis 1253 - Installation Checkout

24
Curtis 1253 Manual, Rev. F
3 — PROGRAMMABLE PARAMETERS: Final Speed Request Parameters
SS HIGH SPEED ON (1253-4804 only)
In some applications using the 1253-4804 controller, it may be desirable to
have the pump speed dened by the highest request. When the SS High Speed
On parameter is programmed On, the controller will enter SS High Speed On
mode. In this mode, if the Final rottle request = 0, the pump speed will be
dened by the highest speed request among all the active speed select (SS) re-
quests; otherwise, the pump speed will be dened by the Final rottle Request.
If SS High Speed On is programmed O, the pump speed will be dened
by Add Mode or First On Mode.
SS High Speed On speed conditioning is shown in detail in Figure 14.
Fig. 14 SS High Speed On speed conditioning diagram.
0 0.5 1
1
Final Motor Speed Request
The SS High Speed On parameter determines how multiple requests are handled:
ON = SS High Speed On mode.
OFF = Add mode or First On mode.
MAX
100%
SS Switch Conditioning
Final SS Request
Final Throttle Request
Throttle Conditioning
Throttle
Thrtl Max Spd
Throttle Map
Final Throttle
Request
Min Speed
100%
>0
=0
SS1 Speed
SS2 Speed
SS3 Speed
SS4 Speed
Σ
100%