Control Process - SCC MAM – 890 Operation Manual

5 Control Process

Single Machine
Working principle (On/off mode: Local; Load mode: Auto)
①、 Press
The air compressor cannot be started by pressing
The start process of compressor is as followed: 18 terminal closed, KM2 is energized; 17 terminal
closed, KM3 is energized → Y start → STAR DELAY me starts record; when Y-△transfer time
over,17 terminal open, KM3 is de-energized and 16 terminal closed, KM1 is energized → motor
operates in △. (KM1 and KM3 are interlocked)
②、 Automatic operation control:
2.1: When motor enter delta status, LOAD DELAY starts, controller will load
2.2: If air pressure is detected higher than UNLOADING P set, 15 terminal opens, loading valve is
2.3: In STANDBY mode, controller start automatically if pressure detected is below LOADING P
③、 Manual loading/unloading operation under automatic status
3.1 When air pressure is between LOADING P and UNLOADING P, press
3.2 When air pressure is above the UNLOADING P, controller unloads
3.3 When air pressure is below the UNLOADING P, controller loads
④、 Normal stop:
Press
all output relay stop working.
⑤、 The frequent starting control
Air compressor cannot start again immediately after NORMAL STOP, EMPTY LONG STOP or
FAILURE STOP. It can start again after START DELAY
04.08.2017
to start: (Y-△start)
automatically after LOAD DELAY.
de-energized, and air compressor starts unloading, and also starts EMPTY DELAY time record,
if unloading time exceed EMPTY DELAY set, compressor will enter STANDBY mode; if
compressor loading again within "EMPTY DELAY" set (when pressure is below LOADING P or
receiving load command), compressor will reset "EMPTY
"loading/ unloading" to switch the current status of controller.
automatically, the loading/unloading button is invalid
automatically, the loading/unloading button is invalid
, the loading magnetic valve will be de-energized, after a while of delay (stop delay),
Operation Manual MAM - 890 V1.0
until 5 seconds self-checking finished.
DELAY".
.
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