MODULE TYPE TAA - PowerPoint PPT Presentation

1 / 13
About This Presentation
Title:

MODULE TYPE TAA

Description:

By means of the signal Zn 1, the pilot valve is reset by the following stepper ... construction of the OR gate. X : input (from signalling element) ... – PowerPoint PPT presentation

Number of Views:493
Avg rating:3.0/5.0
Slides: 14
Provided by: zai89
Category:
Tags: module | taa | type | construct

less

Transcript and Presenter's Notes

Title: MODULE TYPE TAA


1
  • MODULE TYPE TAA
  • made up of three valves
  • -3/2 way valve(as AND gate)
  • -3/2 way double pilot valve
  • -OR gate
  • X input (from signalling element)
  • A output (to a signalling element)
  • P compressed air supply
  • Y to set the memory (flow from P to A)
  • Z to reset the memory (pressure relief from P
    to A)
  • L to reset the stepper sequencer (4 modules)

2
  • MODE OF OPERATION OF MODULE TAA
  • The memory is set by a signal from the preceding
    module. This causes a signal to be sent to A,
    which activates the final control element and
    thus actuator.
  • The actuator signals via a sensor (signal
    element) at input X that a step has been
    completed.
  • The signal at input X reverses the AND gate,
    which sets the memory of the following module via
    Yn1 (pressure is supplied to the AND gate via P)

3
  • MODE OF OPERATION OF MODULE TAA (cont.)
  • Simultaneously to the signal at A, which comes
    from the memory, this signal is passed back via
    Zn and the OR gate to the previous memory and
    resets it.
  • The OR gate enables the sequencer to resume the
    initial position (signals at output A and Yn1)
    in any situation (e.g. emergency stop)

4
  • STEPPER MODULE, EXTENSION
  • four TAA stepper modules

5
  • STEPPER MODULE, EXTENSION
  • TAA TAA TAA TAA
  • P Supply port Yn1 Set output
  • A1, A2, A3, A4 Outputs Y Set input
  • X1, X2, X3, X4 Acknowledgements Zn Reset
    Output
  • L Reset (clear) Zn1 Reset Input

6
  • STEPPER MODULE, EXTENSION (cont.)
  • Consists of a memory (3/2-way double pilot valve)
    plus an AND and OR gate, and incorporates a
    visual switching indicator and manual override.
  • The double pilot valve, with air applied at P, is
    actuated, i.e. reversed, via inlet Y.
  • Produces a signal at outlet A for the intended
    switching step, this signal also resets a
    previous step, actuates the visual indicator and
    is applied to the AND gate.

7
  • STEPPER MODULE, EXTENSION (cont.)
  • As soon as an acknowledgement signal of the
    initiated switching operation has been received
    at X, flow is opened at the AND gate and the
    following stepper module actuated via Yn1.
  • An OR gate has been connected in series to port Z
    of the double pilot valve. By means of the signal
    Zn1, the pilot valve is reset by the following
    stepper module, i.e. the memory is cleared.
  • The second inlet L can be used to return the
    entire sequencer to its starting position (e.g.
    for reset following an EMERGENCY-STOP).

8
  • MODULE TYPE TAB
  • -similar to module TAA
  • -the difference is in the
  • construction of the OR gate
  • X input (from signalling element)
  • A output (to a signalling element)
  • P compressed air supply
  • Y to set the memory (flow from P to A)
  • Z to reset the memory (pressure relief from P
    to A)
  • L to reset the stepper sequencer (4 modules)

9
  • MODE OF OPERATION OF MODULE TAB
  • There must always be flow to A in the previous
    memory in the initial position and it must be set
    so that via the AND gate of this module and Yn1
    a continuous pulse for renewed setting of the
    first memory is present at the AND gate switched
    ahead of the sequencer.
  • If, together with the start pulse, the first
    memory is via the AND gate, then the previous
    memory is reset via Zn1, i.e it is ready to take
    over the final step of the new operating cycle.

10
  • STEPPER MODULE
  • three TAA stepper modules
  • one TAB stepper module

11
  • STEPPER MODULE, EXTENSION
  • TAA TAA TAA TAB
  • P Supply port Yn1 Set output
  • A1, A2, A3, A4 Outputs Y Set input
  • X1, X2, X3, X4 Acknowledgements Zn Reset
    Output
  • L Reset (clear) Zn1 Reset Input

12
  • STEPPER MODULE (cont.)
  • In the case of module type TAB, an OR gate is
    positioned upstream of the Yn inlet of the double
    pilot valve.
  • If a signal is applied at Yn or L, the valve is
    reversed and a signal appears at outlet A, this
    signal also resets the preceding stepper module,
    the visual indicator and the AND gate is supplied
    with pressure.
  • When the acknowledgement signal reaches X, the
    AND flow is released and the signal Yn1 appears,
    also maintained if the entire sequencer is reset
    at L and can thus be used for a renewed start.

13
  • STEPPER MODULE (cont.)
  • When the sequencer chain is started, the module
    is reset externally at port Z via the reset
    signal Zn1 of the first module of the sequencer.
  • With the TAA modules, an OR gate is connected
    upstream of port Z in the double pilot valve.
  • This is why, in this case, the double pilot valve
    is returned via a signal at Zn1 from the
    following stepper.
Write a Comment
User Comments (0)
About PowerShow.com