Correction Commande Mélangeur focuses on the operation of a mixing system using timers and functional blocks. It details the sequential steps for solvent and reagent dispensing, maintaining agitation, and draining. This document is essential for engineers and technicians involved in automation and control systems. It includes specific timer settings and actions for each step of the mixing cycle, making it a practical guide for implementing effective mixing processes.

Key Points

  • Details the sequential operation of a mixing system using timers.
  • Includes specific timer settings for solvent and reagent dispensing.
  • Describes the maintenance of agitation during the mixing process.
  • Explains the logic ladder used for controlling the mixing cycle.
melia
2 pages
Language:French
Type:Solution Manual
Engineering
melia
2 pages
Language:French
Type:Solution Manual
Engineering
302
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Correction – Exercice n°1 : Commande d’un
mélangeur
1) Fonction d’impulsion : Utiliser un temporisateur impulsionnel (TP) – temporisateur monostable.
6) Fonction de retard à la désactivation : Utiliser un temporisateur retard à l’extinction (TOF).
2) Bloc fonctionnel « Versements » (Langage CONT – Ladder)
Le cycle de mélange est commandé par étapes séquentielles :
Étape Durée / Timer Action principale Sorties actives
1. Versement solvant 12 s (TP) Ouverture EVS + Pompe active EVS, P, vitesse 350 tr/min
2. Versement réactif 8 s (TP) Ouverture EVR + agitation rapide EVR, YVN=945 tr/min
3. Maintien 10 s (TP) Maintien agitation à 945 tr/min YVN=945 tr/min
4. Vidange — Ouverture EVV jusqu’à niveau bas EVV
Logique Ladder simplifiée :
1. D appuyé → mise à 1 du bit CYCLE (lancement du cycle)
2. CYCLE → STEP1 (versement solvant)
- EVS = 1 ; P = 1 ; vitesse 350 tr/min
- Timer T_SOLV (12 s)
- À la fin de T_SOLV → STEP2
3. STEP2 (versement réactif)
- EVR = 1 ; vitesse 945 tr/min
- Timer T_REACT (8 s)
- Fin → STEP3
4. STEP3 (maintien)
- YVN = 945 tr/min
- Timer T_POST_EVR (10 s)
- Fin → STEP4
5. STEP4 (vidange)
- EVV = 1 jusqu’à DNB = 1 (cuve vide)
- Fin du cycle → reset CYCLE
Modification – Retard Pompe :
Pour maintenir la pompe 2,5 s après la fermeture d’EVS :
P = EVS OR T_PUMP_OFF.Q avec T_PUMP_OFF = TOF (2,5 s).
Timers utilisés :
Nom Type Durée Fonction
T_SOLV TP 12 s Durée versement solvant
T_REACT TP 8 s Durée versement réactif
T_POST_EVR TP 10 s Maintien après EVR
T_PUMP_OFF TOF 2,5 s Retard arrêt pompe
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FAQs

what is Correction Commande Mélangeur - Exercice 1 about

Correction Commande Mélangeur - Exercice 1 focuses on the operational sequence of a mixing process using programmable logic controllers (PLCs).

  • It outlines the steps for solvent and reactive pouring.
  • It details timers used for controlling the duration of each step.
  • It includes logic for maintaining pump operation and ensuring proper mixing conditions.

how to implement Correction Commande Mélangeur - Exercice 1 steps

Implementing the steps in Correction Commande Mélangeur - Exercice 1 involves following a structured sequence of operations.

  • Start with the solvent pouring for 12 seconds.
  • Follow with reactive pouring for 8 seconds.
  • Maintain agitation for 10 seconds before draining.

what timers are used in Correction Commande Mélangeur - Exercice 1

Correction Commande Mélangeur - Exercice 1 utilizes several timers to manage the mixing process.

Timer NameTypeDurationFunction
T_SOLVTP12 sDuration for solvent pouring
T_REACTTP8 sDuration for reactive pouring
T_POST_EVRTP10 sPost-reactive agitation
T_PUMP_OFFTOF2.5 sDelay for pump shutdown

what is the logic used in Correction Commande Mélangeur - Exercice 1

The logic in Correction Commande Mélangeur - Exercice 1 is designed to control the mixing cycle through a sequence of steps.

  1. Pressing the start button initiates the cycle.
  2. The cycle progresses through solvent pouring, reactive pouring, and agitation.
  3. Finally, it includes a drainage step until the tank is empty.

what are the main actions in Correction Commande Mélangeur - Exercice 1

The main actions in Correction Commande Mélangeur - Exercice 1 include specific operations for mixing and draining.

  • Opening valves for solvent and reactive materials.
  • Activating pumps for mixing.
  • Maintaining specific speeds for effective mixing.