About the Book
This document will acquaint you with the system functions and variables offered within the Modicon M241 Logic Controller. The M241 PLCSystem library contains functions and variables to get information from and send commands to the controller system.
This document describes the data type functions and variables of the M241 PLCSystem library.
The following knowledge is required:
oBasic information on the functionality, structure, and configuration of the M241 Logic Controller.
oProgramming in the FBD, LD, ST, IL, or CFC language.
osystem variables (global variables).
This document has been updated for the release of EcoStruxureTM Machine Expert V1.1.
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Title of Documentation |
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EcoStruxure Machine Expert Programming Guide |
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Modicon M241 Logic Controller Hardware Guide |
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Modicon M241 Logic Controller Programming Guide |
You can download these technical publications and other technical information from our website at https://www.schneider-electric.com/en/download
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LOSS OF CONTROL |
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oThe designer of any control scheme must consider the potential failure modes of control paths and, for certain critical control functions, provide a means to achieve a safe state during and after a path failure. Examples of critical control functions are emergency stop and overtravel stop, power outage and restart. oSeparate or redundant control paths must be provided for critical control functions. oSystem control paths may include communication links. Consideration must be given to the implications of unanticipated transmission delays or failures of the link. oObserve all accident prevention regulations and local safety guidelines.1 oEach implementation of this equipment must be individually and thoroughly tested for proper operation before being placed into service. |
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Failure to follow these instructions can result in death, serious injury, or equipment damage. |
1 For additional information, refer to NEMA ICS 1.1 (latest edition), "Safety Guidelines for the Application, Installation, and Maintenance of Solid State Control" and to NEMA ICS 7.1 (latest edition), "Safety Standards for Construction and Guide for Selection, Installation and Operation of Adjustable-Speed Drive Systems" or their equivalent governing your particular location.
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UNINTENDED EQUIPMENT OPERATION |
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oOnly use software approved by Schneider Electric for use with this equipment. oUpdate your application program every time you change the physical hardware configuration. |
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Failure to follow these instructions can result in death, serious injury, or equipment damage. |
