Display and evaluate STATUS output
You can display and interpret the actual operands in the STATUS output of the function blocks.
Note
An error message is only output if the ERROR bit (request completed with error) is set. In all other
cases the STATUS word is zero.
Event Class 30
Event class 30 contains error messages which might occur during communication between the
CP 440 and the CPU via the S7 backplane bus.
The table below describes event class 30.
Table 8-3 Event Class 30
Event class 30 (1EH): "Error during communication between CP and CPU"
Event No. Event Further Information/Remedy
(1E)0DH
• Job aborted due to a cold restart, warm restart or
reset
• Module rmware does not exist
• Repeat the job.
• Check whether the module is inserted.
(1E)0EH Static error when the RD_REC SFC was called. Return
value RET_VAL of SFC is available for evaluation in
SFCERR variable in instance DB.
Load SFCERR variable from instance DB.
(1E)0FH Static error when the WR_REC SFC was called. Return
value RET_VAL of SFC is available for evaluation in
SFCERR variable in instance DB.
Load SFCERR variable from instance DB.
(1E)41H Number of bytes set in LEN parameter of FBs illegal. Keep to the value range of 1 to 400 bytes (see chap‐
ter "Overview of the Function Blocks (Page 73)").
Calling the SFCERR Variable
You can obtain more information on errors 14 (1E0EH) and 15 (1E0FH) in event class 30 by
means of the SFCERR variable.
You can load the SFCERR variable from the instance DB belonging to the corresponding function
block.
The error messages entered in the SFCERR variable are described in the section on the system
functions SFC 58 "WR_REC" and SFC 59 "RD_REC" in the System Software for S7-300/400, System
and Standard Functions reference manual.
See also
Serial Transmission of a Character (Page 17)
Diagnostics with the CP 440
8.3 Diagnostics Messages of the Function Blocks
Point-to-point connection CP 440 Installation and Parameter Assignment
Equipment Manual, 03/2022, A5E00057742-AE 103
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