11/22/2016 2:50 PM | |
Posts: 26 Rating: (2) |
Hello everybody. I opened a project and I found this strange situation. I have an UDT1002, in which are declared 800 BOOL. In Symbol Table is declared DB2, whose data type is UDT1002 (see image DB2). In blocks, I haven't DB2, but in FC I can see symbol assigned. Where is DB2? How is it declared? How can I download it in CPU memory? Thanks for your support. Best regards. ------------------------------------------------------------------------------------------ |
Last edited by: Min_Moderator at: 11/24/2016 1:32:43 PMNew subject after splitting |
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11/22/2016 5:28 PM | |
Posts: 5225 Rating: (1192) |
Hi. The above statement is where I am stuck in understanding. Many PLC brands do not use this DB concept as Siemens does for creating data space. So as reference a video... [LINK] It is not a requirement that a DB be linked to an FB. A global DB is created as-if it is a code block (OB / FC / FB). w |
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