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25. Pump Operation Mode Selection (Sn-30)
• The 1-8 PID Relay option card application parameter. Set PA-PID card ineffective (Sn-30=0)
when the 1-8 PID Relay card is not installed. Please refer to “PA-PID instruction manual”.
• Sn-30 = 0:
1-8 PID Relay card is ineffective.
Sn-30 = 1:
Fixed AC drive mode stops all the pumps by first-run-last-stop sequence. i.e.
Only one of the pumps is driven by AC drive, the others are run with the ac
power source. Take the first run pump last stop sequence to stop all the
pumps. This operation mode is better when different motor HP/KW ratings
are used.
Sn-30 = 2:
Fixed AC drive mode stops the pump driven by the AC drive only. i.e.
When the AC drive outputs the stop signal, only the inverter driven pump
is stopped.
Sn-30 = 3:
Fixed AC mode, stops all the pumps by first-run-first-stop sequence. i.e.
the first-run (the motor running for the longest time) -first-stop sequence
is adapted to stop the motors and keeps the pumps at almost the same duty.
This operation mode is better when using the same motor HP/KW ratings.
Sn-30 = 4:
Cycled AC drive mode, stops all the pumps by first-run-first-stop
sequence. (i.e. Except for the auxiliary pumps, all the pumps are controlled by
AC drive, and take the first-run-first-stop sequence to stop all the pumps).
Sn-30 = 5:
Cycled AC drive mode; stops the inverter-driven pumps only.
• Fixed AC drive mode and Cycled AC drive mode connection examples:
(a) Fixed AC Drive mode
(b) Cycled AC Drive mode
Fig. 13 Pump Operation mode
26. 1-8 PID Card Relay 2 Control (Sn-31)
27. 1-8 PID Card Relay 3 Control (Sn-32)
28. 1-8 PID Card Relay 4 Control (Sn-33)
2-64
PA 7300
PART II: OPERATION MANUAL
INV
M1
M2
M3
M4
M5
M6
MC0(RY1)
MC1(RY2)
MC2(RY3)
MC3(RY4)
MC4(RY5)
MC5(RY6)
MC6(RY7)
M7
MC7(RY8)
3
power
source
INV
M1
M2
M3
M4
MC0(RY1)
MC2(RY3)
MC4(RY5)
MC6(RY7)
MC1(RY2)
MC3(RY4)
MC5(RY6)
MC7(RY8)
3
power
source
Содержание PA7300 Series
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Страница 154: ...5100 N IH 35 Round Rock Texas 78681 USA 1 800 279 4007 www tecowestinghouse com ...