SOP on Handling of PLC System Failure

  • Objective:To lay down the procedure for Handling of PLC System Failure.
  • Scope:This standard operating procedure is applicable for all PLC system’s installed in formulation plant of Pharmaceutical company name with location.
  • Responsibility
    • Production Supervisor / Officer shall be responsible for implementation of this SOP.
    • Engineering personnel shall be responsible for handling and repairing the PLC system hardware
    • Head-Production/ Designee shall be responsible for compliance of this SOP.
  • Abbreviations and Definitions

SOP – Standard Operating Procedure

QA – Quality Assurance

S.S.- Stainless steel

PLC – Programmable logical controller

HDPE – High density polyethylene

MMI –  Man Machine Interface

  • Procedure
    • In case of PLC/MMI Software/Hardware failure condition, production department shall intimate to Engineering department for the corrective action through Maintenance work order.
    • After receiving the Maintenance work order, Production shall handover the equipment for further action.
    • Engineering Department shall take following action.
      • Engineering department shall have  PLC hardware system in spare or purchase new as per specification
      • Keep application software / source code backup for all PLC system with application name, software version and store in control area in two different locations.
      • Restore by either external agency or vendor service engineer.
      • Production, Engineering and QA person shall take the trial for the operation of the equipment and revalidate the equipment and control system.
      • If operation of equipment found satisfactory, then engineering department shall hand over the equipment to production department.

Precaution:-During the maintenance work all the material shall be taken out and covered properly in HDPE or S.S container with a “CONTAINER LABEL” affixed on it.

  • Forms and Records

Not Applicable

  • Distributions
    • Master Copy – Documentation Cell (QA)
    • Controlled Copies – Production, Engineering and Quality Assurance
  • History
Date Revision


Reason for revision
00 New SOP

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