Johnson Controls York AYK550, Руководство пользователя

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YORK, A Johnson Controls Company
In an autochange, the Autochange function does all of the
following (see figure):
• Initiates a change when the running time, since the last
autochange, reaches 8118
AUTOCHNG INTERV
, and PFA input
is below limit 8119
AUTOCHNG LEVEL
.
• Stops the speed regulated motor.
• Switches off the contactor of the speed regulated motor.
• Increments the starting order counter, to change the starting
order for the motors.
• Identifies the next motor in line to be the speed regulated
motor.
• Switches off the above motor’s contactor, if the motor was
running. Any other running motors are not interrupted.
• Switches on the contactor of the new speed regulated motor.
The autochange switchgear connects this motor to the
AYK550 power output.
• Delays motor start for the time 8122 PFA
START DELA
y.
• Starts the speed regulated motor.
• Identifies the next constant speed motor in the rotation.
• Switches the above motor on, but only if the new speed
regulated motor had been running (as a constant speed
motor) – This step keeps an equal number of motors running before and after autochange.
• Continues with normal PFA operation.
#,, 7&32 ,
The operation of the starting-order counter:
• The relay output parameter definitions (1401…1403 and
1410…1412)) establish the initial motor sequence. (The lowest
parameter number with a value 31 (PFA) identifies the relay
connected to 1PFA, the first motor, and so on.)
• Initially, 1PFA = speed regulated motor, 2PFA = 1st auxiliary
motor, etc.
• The first autochange shifts the sequence to: 2PFA = speed
regulated motor, 3PFA = 1st auxiliary motor, …, 1PFA = last
auxiliary motor.
• The next autochange shifts the sequence again, and so on.
• If the autochange cannot start a needed motor because all
inactive motors are interlocked, the drive displays an alarm (2051,
PFA INTERLOCK
).
• When AYK550 power supply is switched off, the counter
preserves the current Autochange rotation positions in permanent memory. When power is restored, the
Autochange rotation starts at the position stored in memory.
• If the PFA relay configuration is changed (or if the PFA enable value is changed), the rotation is reset. (See the first
bullet above.)
8120
*'!"&# ^ ] 9
Defines operation of the Interlock function. When the Interlock function is enabled:
• An interlock is active when its command signal is absent.
• An interlock is inactive when its command signal is present.
• The AYK550 will not start if a start command occurs when the speed regulated motor’s interlock is active – the
control panel displays an alarm (2015,
PFA INTERLOCK
).
Wire eAYK Interlock circuit as follows:
• Wire a contact of the motor’s On/Off switch to the Interlock circuit – the drive’s PFA logic can then recognize that the
motor is switched off, and start the next available motor.
• Wire a contact of the motor thermal relay (or other protective device in the motor circuit) to the Interlock input – the
drive’s PFA logic can then recognize that a motor fault is activated and stop the motor.
0 =
NOT SEL
– Disables the Interlock function. All digital inputs are available for other purposes.
• Requires 8118
AUTOCHNG INTERV
= 0 (The Autochange function must be disabled if Interlock function is disabled.)
1 =
DI
1 – Enables the Interlock function, and assigns a digital input (starting with
DI
1) to the interlock signal for eAYK
PFA relay. These assignments are defined in the following table and depend on:
The number of PFA relays (number of parameters 1401…1403 and 1410…1412) with value = 31 (
PFA
).
2c_%\
23 =,2 ! 7 !2,2 4, #
t
P 8118
B
PID Output
P 8119
100%
P 8118
1PFA
2PFA
3PFA
4PFA
4PFA
2PFA
3PFA
A
P 8122
A = Area above 8119
AUTOCHNG LEVEL
–
autochange not allowed.
B = Autochange occurs.
1PFA, etc. = PID output associated with eAYK
motor.
No aux 1 aux
motor
2 aux
motors
motors
PID output
P 8119
100%
Output
f
MAX
Area
frequency
Autochange
is Allowed