Table 10.1 States Of Leds And Remote Output Signals At Power Failure; Table 10.2 Operations Of The Stp Pump After Power Recovery - Edwards STP-L301 Series Instruction Manual

STP-L301/L451 Series Instruction Manual
< Operation after a Power Recovery>
MANUAL operation
1)
The STP pump continues decelerating even after a power recovery. Press the
"START" switch to reaccelerate the STP pump.
REMOTE operation
2)
When the START signal is input to the REMOTE input terminal at a power
recovery to reaccelerate the STP pump.
When the START signal is not input to the REMOTE input terminal after a power
recovery, the STP pump continues the BRAKE operation.
◇ Establish a sequence so that the power can be supplied to the STP control unit
immediately after a power recovery.
Table 10.1 shows the states of LEDs and the REMOTE output signals at a power failure.
Also, Table 10.2 shows the operations of the STP pump after a power recovery.

Table 10.1 States of LEDs and REMOTE Output Signals at Power Failure

Rotational speed
(rpm)
20,000 or more
17,000 or more and
less than 20,000
Less than 17,000

Table 10.2 Operations of the STP Pump after Power Recovery

Rotational speed Duration of
(rpm) power failure
Approx 2 sec.
or longer
25,000 or more
Shorter than
approx 2 sec.
Approx 0.02 to
0.14 sec.
Less than 25,000
Shorter than
the above
*1
: A power failure is detected faster the less the number of rotations at the power failure.
LCD
Message Backlight
POWER
ON
FAILURE
POWER
OFF
FAILURE
OFF OFF
MANUAL operation
STP pump operation
after power recovery
Deceleration/Stop
Deceleration/Stop
*1
10-2
LEDs
POWER FAILURE
LED LED
OFF ON
OFF ON
OFF OFF
REMOTE operation
"START" REMOTE
signal input after
power recovery
Yes
No
Continues as before.
Yes
No
Continues as before.
REMOTE output
signals (I/O TB1)
Power ON ALARM
signal signal
OFF ON
OFF OFF
OFF OFF
STP pump operation
after power recovery
Reacceleration
Deceleration/Stop
Reacceleration
Deceleration/Stop