Toshiba 18 - 1250 A - Manual (Page 56)

TE Series Digital Solid State Soft Starters 18 – 1250A
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5.6.9 Lockouts, Reset and Internal Protection Features
F048 – F050 provide lockout protection for motors and equipment that
may have potentially damaging consequences from premature restart or
with limited duty cycles. Time and count values for these lockouts can
be viewed in F055 – F058. Time values are based on the Real Time
Clock and DONOT reset when power is lost or disconnected.
Emergency clearing of lockouts can be accomplished in F071.
ƒ NOTE:
When F048 through F050 are used with 3 wire control systems, a
Start command will not seal in during lockout time. When time has
expired, a new Start command will be necessary.
WARNING
When F048 through F050 are used with 2-wire control, the starter may re-start
automatically when time has expired. Adequate warnings similar to those in Section
3.1.3.b should be observed.
F048 = Coast Down Lockout Timer (Back Spin Timer)
Factory Setting = 0 (Disabled)
Range = 1 - 60 minutes, or 0 (Disabled)
When F048 = 1 through 60, this sets the number of minutes that
the starter must be off before a restart can be attempted. This
function is useful in applications such as pump motor backspin
protection (where you need to prevent the pump motor from
restarting if it is spinning backwards), 2 speed operations where
speed changes require a minimum disconnect (spin-down
timer), or reversing applications to prevent plugging (anti-
plugging timer).
F049 = Maximum Starts per Hour Lockout
Factory Setting = 0 (Disabled)
Range = 1 – 10 or 0 (Disabled)
If F049=1 through 10, this feature will count the number of start
commands within a 1 hour period. If the setting (maximum
starts per hour) is exceeded, starting is prohibited until sufficient
time has expired. This timer initiates upon the first start in an
hour. It resets after 1 hour from that start and waits until another
subsequent start to initiate again. (Often used in conjunction
with F050).
ƒ NOTE:
ƒ Consult the motor manufacturer for a “Starts-per-Hour” or “Starting
Duty Cycle” rating. Larger motors tend to have lower starts-per-hour
ratings.
ƒ When using the Decel function (F025) or an electronic braking
option, count these cycles as additional “starts” when determining
maximum starts-per-hour.
Figure 5.6.9:
Coast Down Lockout Timer