SMC Networks EtherCAT EX260-VEC1 - Example of Energy Saving Operation

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No.DOC1048575-1
6. Example of energy saving operation
Fig 6-1. Example of energy saving operation of ejector
 (1)After the vacuum instruction is ON, the supply valve is automatically closed when the vacuum
pressure reaches P2.
 (2)When the vacuum pressure drops by P2-H2, the supply valve is automatically opened again.
 (3)Repeat steps (1) and (2) unless the valve protection function is activated.
 (4)The vacuum status bit is set to 1 until the vacuum pressure reaches P1 and then drops to P1-H1.
 (5)The release status bit is set to 1 until the release pressure reaches P3 and then drops to P3-H3.
 For the setting of each threshold and hysteresis, refer to Section 5.1.1 onwards.
Vacuum
instruction
ON
OFF
Positive pressure
Atmospheric
pressure
Time
Vacuum
status
bit
1
0
Release
status
bit
1
0
Negative
Supply
valve
Open
Closed
Release
instruction
ON
OFF
Release
Valve
Open
Closed
(1)
(2)
(3)
(4)
(5)
H3
P3
H1
P1
P2
H2
Pressure of
release
status
Pressure of
vacuum
status
Energy
saving
function