VMX
2
Series Digital Solid State Soft Starter User Manual
50 |
P a g e
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
DO NOT
reset when power is lost or disconnected.
Emergency clearing of lockouts can be accomplished in
F071
.
▪
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)
F048 = 1 - 60
, 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)
F049 = 1 - 10
, counts 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
).
Notes:
▪
Consult the motor manufacturer for a “Starts-per-Hour” or “Starting
Duty Cycle” rating. Larger motors tend to have lower starts-per-hour
ratings.
▪
When using the Decel function (
F025
), or an external electronic
braking option, count these cycles as additional “starts” when
determining maximum starts-per-hour.
