Industrial Automation Knowledge Base

Issue When it comes to dealing with IIoT solutions with EAE, NETIO Basic Function Block is one of the most useful to handle interactions with cloud services. However, the help file does not elaborate in detail how to use it. Resolution Understand how NETIO is to be used for a HTTP Post with an example application. We will also get to see how the response should be handled.   Disclaimer The views and opinions expressed in this article are those of the author(s) and do not necessarily reflect the official policy or position of Schneider Electric.  

Manage forced variables in a PLC program has been a challenge on the industry for decades. Ideally every plant manager wants a ZERO force policy but in real world this not possible and eventually a force must be put in place to ensure production KPIs. Then the challenge becomes how to manager those forces. The solution to manage forces is to give full transparency by showing the status of forced variables in a SCADA system where operation managers and maintenance managers could see and take the needful action to replace the damaged sensors and then removed the forces in the PLC program. This KB shows an easy way to manage forces through the OPC quality code by displaying it in the supervision system.

Issue Connecting Primary Controller if Standby Controller not Available on the Network Resolution Ref Attachment Disclaimer The views and opinions expressed in this article are those of the author(s) and do not necessarily reflect the official policy or position of Schneider Electric.  

Issue EcoStruxure Control Expert doesn't provide Double length real calculation functions.  Resolution This library performs Long real calculation using an array type LREAL of 2 Dword, where the long real is coded using IEEE 754 format. The zip file attached contains the library, a FBD section to test the library and a tool allowing to convert the IEEE 754 format (useful to make the test) Be aware that all the controls are not performed when overflow happens, so use the library with care, mainly when you perform type conversions.   Function list Math functions ADD_DREAL SUB_DREAL MUL_DREAL DIV_DREAL ABS_DREAL NEG_DREAL POW_DREAL SQRT_DREAL EXP_DREAL LN_DREAL LOG_DREAL Trigononmetric Functions ACOS_DREAL ASIN_DREAL ATAN_DREAL COS_DREAL SIN_DREAL TAN_DREAL Logic Functions EQ_DREAL GE_DREAL GT_DREAL LE_DREAL LT_DREAL Convertion Functions INT_TO_DREAL DINT_TO_DREAL DREAL_TO_DINT DREAL_TO_INT DREAL_TO_REAL DREAL_TO_STRING REAL_TO_DREAL Disclaimer The views and opinions expressed in this article are those of the author(s) and do not necessarily reflect the official policy or position of Schneider Electric. This library is given as if. Use of the library is the responsibility of the user