140 Program features
How to parameterize SPFC control
1. Set PFA reference steps (parameters 8103…8105) if needed.
2. Set PFA start and stop frequencies (parameters 8109…8114).
3. Set PFA auxiliary motor start and stop delays (parameters 8115…8116).
4. Set the number of auxiliary motors (parameter 8117).
5. Enable Autochange (parameter 8118). In SPFC control, the parameter only allows
SPFC to use PFA's alternation switchgear box. It is not used as the operating time
interval between the automatic motor changes as in normal PFA application.
6. Autochange level is ignored (parameter 8119).
7. Parameterize Interlocks (parameter 8120).
8. Set Bypass function if needed (parameter 8121).
9. Set PFA start delay (parameter 8122).
10. Enable SPFC. Depending on the application, set parameter 8123 PFA ENABLE
to value 2 (SPFC ACTIVE – SPFC) or value 3 (SPFC + AUTOCHANGE).
Value 1 (ACTIVE): enables normal PFA functionality.
Value 2 (SPFC ACTIVE – SPFC): enables SPFC function with auxiliary motors
running.
Value 3 (SPFC + AUTOCHANGE): enables SPFC function only when auxiliary
motors are not running
11. Set PFA acceleration and deceleration times if needed (parameters 8124…8125).
12. Autochange enable with a timed function is ignored (parameter 8126).
13. Set relays in Group 14: Relay outputs. (Transistor output TO [parameter 1805 DO
SIGNAL] can be used as an additional relay output, if needed.) Both PFA and
SPFC use these relays. You must set at least as many relays as there are motors
set for SPFC (= the number of auxiliary motors [parameter 8117] + 1 [speed
regulated motor] when SPFC is used).
14. Set the number of PFA controlled motors in parameter 8127 (= number of PFC
relays in Group 14: Relay outputs).
15. Also set other needed motor dependent parameters, eg 2007 MINIMUM FREQ,
2008 MAXIMUM FREQ and 2605 U/F RATIO.
PFA control and SPFC control default settings have differences in acceleration time
(2202), deceleration time (2203) and auxiliary motor stop delay (8116) parameters.
Settings
Parameter Additional information
Group 14: Relay outputs Selections of relay outputs for starting and stopping of
motors
Group 18: Freq in & tran out Selections of relay outputs for starting and stopping of
motor (transistor output can be used as an additional
relay)
Group 44: Pump protection Pump protection (pressure monitoring) settings
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