Festo VABF-S4-1-V2B1 Series, VABF-S4-1-V2B1-C-VH-20 Operating Instructions Manual
en Operating
instructions
8068454
1705c
[8068456]
Vacuum block
VABF-S4-1-V2B1...
VABF-S4-1-V2B1...
2 Festo – VABF-S4-1-V2B1... – 1705c
Original instructions
VABF-S4-1-V2B1-EN
Identification of hazards and instructions on how to prevent them:
Danger
Immediate dangers which can lead to death or serious injuries
Warning
Hazards that can cause death or serious injuries
Caution
Hazards that can cause minor injuries
Other symbols:
Note
Material damage or loss of function
Recommendations, tips, references to other documentation
Essential or useful accessories
Information on environmentally sound usage
Text designations:
Activities that may be carried out in any order
1. Activities that should be carried out in the order stated
– General lists
è Result of an action/References to more detailed information
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English – Vacuum block VABF-S4-1-V2B1...
Table of contents
1 Product description 4.......................................................
1.1 Overview 4................................................................
1.2 Characteristics 6...........................................................
1.3 Operating statuses of the vacuum block 7.......................................
1.4 Electrical and pneumatic status changes 8.......................................
2 Function and application 9...................................................
2.1 Operating mode of the air-saving function (LS) 10..................................
3 Requirements for product use 12...............................................
4 Installation 13..............................................................
4.1 Mechanical 13..............................................................
4.2 Pneumatic 14...............................................................
4.3 Electric 14..................................................................
5 Quick commissioning with default settings 15....................................
6 Commissioning 16...........................................................
6.1 Symbolic LCD display 18......................................................
6.2 SHOW mode 19.............................................................
6.2.1 Display settings for Out A/B 19.........................................
6.3 Edit mode 20...............................................................
6.3.1 Start EDIT mode 20..................................................
6.3.2 Setting the switching characteristics of the switching outputs 21.............
6.4 Test run 22.................................................................
7 Operation 23...............................................................
7.1 Manual override 23..........................................................
7.2 Changing settings and values 24................................................
7.3 Resetting the pressure switch of the vacuum block to factory settings 25...............
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8 Maintenance and care 25.....................................................
9 Disassembly 25.............................................................
10 Fault clearance 26...........................................................
11 Accessories 28..............................................................
12 Technical data 29............................................................
13 Menu structure 32...........................................................
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1 Product description
For all available product documentation è www.festo.com/pk
1.1 Overview
2
6
4
5
1
7
8
3
1 Pressure sensor with LCD display and
operating buttons
2 Plug connector for electrical connection and
vacuum sensing (M12, 4-pin)
3 LED signal status display, solenoid valve
4 Manual override vacuum generation
5 Manual override for ejector pulse
(only effective when the power supply is
switched off)
6 Solenoid valve
7 Flow control screw for adjusting the intensity
of the ejector pulse
8 Modular silencer
Fig. 1 Control sections, ports, displays and assemblies
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1 2
3
4
5
6
7
8
1 Display segment switching output Out A
2 Display segment switching output Out B
3 4-digit alphanumeric LCD display
(vacuum display, special display)
4 Toolbar for functions
5 EDIT button
6 DOWN key/B-key
7 UP key/A-key
8 Segment display (è Tab. 4 and Tab. 5)
Fig. 2 Display
Note
The operating keys are designated differently in the user guidance, depending on use!
In selecting the switching outputs A-key/B-key
With the selection of menu items and setting values - UP-key/DOWN-key
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1.2 Characteristics
– Vacuum block for use on the valve terminal VTSA/VTSA-F
– Solenoid valve for controlling vacuum generation (solenoid coil 12) and for controlling the ejector
pulse (solenoid coil 14) for accelerated vacuum reduction and safe placement
– Flow control screw for adjusting the ejector pulse
– Pressure sensor with switching output
– Signal status display of the solenoid valve via LED display
– Switching of the solenoid valve with mechanical manual override for vacuum generation
– The ejector pulse cannot be switched via the mechanical manual override when the power supply is
activated.
– Silencer
– Actuation and air supply via the valve terminal
– Galvanic isolation between the valve terminal and vacuum block
– Non-return valve delays the reduction of the vacuum if the air supply is interrupted.
– Vacuum block supplied with power via separate M12 plug connector, not via the valve terminal
– The vacuum block VABF-S4-1-V2B1 can be operated in combination with the vertical stacking for
pilot air switch-off (intermediate plate VABF-S4-1-S plus 5/2-way valve) on the valve terminal VTSA.
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1.3 Operating statuses of the vacuum block
The vacuum block can be in the following operating statuses:
Operating status Solenoid coil 12 Solenoid coil 14 Explanation
Generate vacuum Controlled (via valve
terminal)
Not controlled Solenoid coil 12:
impulse control with
self-latching loop
1)
Generate vacuum Not controlled Not controlled Operating status after failure of
the pilot air supply or the
electrical supply of the vacuum
module è Tab. 2
Air saving Controlled
(via internal electronics
of the vacuum block)
Controlled
(via internal electronics
of the vacuum block)
Maintain vacuum in
valve mid-position
1)
Ejection Not controlled Controlled (via valve
terminal)
Vacuum accelerates
disassembly
1)
Normal position 2)Not controlled Not controlled Status after the end of the
“Ejection” signal
1)
1) Also see è Fig. 3 and Fig. 4
2) Normal position means the vacuum block is not in the “Generate vacuum”, “Air saving” or “Ejection” operating status.
Tab. 1 Operating statuses of the vacuum block
If the pilot air supply or the electrical supply of the vacuum block is switched off, the respective operat
ing status is changed as follows (è Tab. 2).
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1.4 Electrical and pneumatic status changes
Status change Operating status before status
change
Operating status after status
change
Failure/switch-off of the
electrical supply of the
vacuum block
(M12 connection)
“Generate vacuum” “Generate vacuum”
(The valve slide remains in
“Generate vacuum” position)
“Air saving” “Generate vacuum”
(Through the mechanical spring,
the valve slide goes into the
“Generate vacuum” position)
“Ejection” “Normal position”
1)
“Normal position”
1)
“Normal position”
1)
Failure/switch off of the
pilot air supply
“Generate vacuum” “Generate vacuum”
“Air saving” “Generate vacuum”
“Ejection” “Normal position”
1)
“Normal position”
1)
“Normal position”
1)
1) Normal position means the vacuum block is not in the “Generate vacuum”, “Air saving” or “Ejection” operating status.
Tab. 2 Pneumatic and electrical status changes
Note
If there is a failure of the air or electrical supply of the valve terminal, the following
statuses result.
Air failure:
– No vacuum can be generated, even if the valve is in the “Generate vacuum” posi
tion.
– No ejection impulse can be generated, even if the valve is in the “Ejection” posi
tion.
Failure of the valve terminal electrical supply:
– The switching position of the valve can only be changed through the electronics
of the vacuum block (change between “Generate vacuum” and “Air saving”).
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2 Function and application
The intended use of the vacuum block VABF-S4-1-V2B1… is to generate a vacuum. The generated vacu
um and a suction gripper produce a force which is used to grip and transport a workpiece. The supply of
compressed air for vacuum generation is controlled by an integrated solenoid valve. The vacuum is
generated by actuating solenoid coil 12. The setpoint value set at channel B for the generated vacuum
is monitored via an integrated pressure sensor. Vacuum generation reverts to a self-holding phase after
reaching the setpoint value. The vacuum block controls the vacuum generation process independently
within the range of the set switching points (air-saving function). With the integrated solenoid valve, an
ejector pulse is activated and generated by activating coil 14 to release the workpiece safely from the
suction cup and to reduce the vacuum quickly. The length of the ejector pulse can be influenced by the
duration of the electrical pulse. The strength of the ejector pulse is influenced by the adjustable flow
control valve.
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Vacuum Ejection
Fig. 3 Function
2.1 Operating mode of the air-saving function (LS)
If the desired threshold value 1 (è Fig. 4 “mode of operation air saving function”) is reached for the
vacuum, vacuum generation is automatically switched off. Non-return valves prevent the reduction of
the vacuum. Nonetheless, leakage (e.g. due to rough workpiece surfaces) will slowly reduce the vacu
um. If the pressure drops below the set threshold value 2, vacuum generation is switched on automat
ically. Vacuum is generated until the set threshold value 1 is reached again.
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