A CPU 315-2 PN/DP with 6ES7315-2EH14-0AB0 on the label maps to a CPU 1515-2 PN, 6ES7515-2AM01-0AB0, in the Siemens migration guide’s CPU table, and the S7-1500 migration does not happen in one move. It happens in two, the second of which is a right-click on the old CPU in the device view called Migrate to … Read more
A DINT stops at 2147483647, and 27648 multiplied by 77673 is 2147503104. That is the whole of the problem with fixed-point scaling in STL: the arithmetic is exact right up to the statement where it is not, and *D reports the crossing by setting OV and OS rather than by refusing to run. Here is … Read more
Maximum PROFIBUS segment length at every DP baud rate on type A cable, with repeater rules, termination values and the meter checks that find the fault.
Communication Modules Communication modules provide data exchange between PLCs and input-output units or between other personal computers. These modules can be operated by direct connection (point to point) or over a network. In a one-to-one connection, the connected processor includes a dual interface. While one computer port is accessed by the programming device, communication is … Read more
Siemens S7 Error Codes, error number, error description and error cause. Error number: Text: Cause: Remedy: 34:178 Block call invalid because interface was changed in the meantime. With Step7 V5.0 the instance DB of the DB type is entered in the symbol list for an FB call. This is no longer permitted with Step7 V5.0. … Read more