Errors And Warnings - Siemens SIMATIC S5 Manual

IP 265
8.5.2

Errors and Warnings

The COM 265 concept of errors and warnings is also similar to that used in STEP 5.
COM 265 can detect various types of errors and inform the user by displaying an appropriate
message.
COM 265 can detect and report the following types of errors:
Errors in semantics and syntax in entries to input fields (operator input errors).
Faults detected during on-line testing and during the execution of service functions (hardware
faults).
Errors detected during compilation of the IP 265 user program (program errors).
COM 265 reports these errors in different ways, depending on their gravity. Some are reported in
the form of error messages, some in the form of warnings, and some in the form of 'indications'.
• Error messages and 'notes' are normally displayed on the message line, as in STEP 5.
• Warnings, in contrast, are displayed in a window in the center of the CRT screen (e.g. "Warning!
Symbolic declarations have not been stored! Do you want all changes to be lost?").
Warnings must be acknowledged with <ESC> or, if a prompt so indicates, with <ESC> "NO"
1
or < > "YES".
Errors in semantics and syntax in entries to input fields
Entries in COM 265 screen forms, programs and IP 265 user program tests are all subject to
specific rules of syntax and semantics.
COM 265 executes semantics and syntax checks on an input text when the user confirms his entry
1
with < >. Entries containing errors are reported (e.g. "Invalid operand address").
Faults detected during on-line testing and during the execution of service functions
COM 265 provides adequate support for on-line testing. On-line functions must fulfill specific
hardware prerequisites.
When an on-line function is started, COM 265 checks to make sure that these prerequisites are
fulfilled, reporting a fault if this is not the case (e.g. "Wrong or defective memory submodule").
EWA 4NEB 812 6130-02a
Fundamentals of COM 265
8-13