S5-115U Manual
5.2
Program Errors
Table 5-9 lists malfunctions caused by program errors.
Error
All inputs are zero
All outputs are not set
One input is zero. One output is not set
Timer or counter is not running or is incorrect
Cold Restart is faulty
Sporadic malfunctions occur
EWA 4NEB 811 6130-02b
Table 5-9. Program Errors
Check the program
Check program assignments
(double assignment, edge formation)
Check Cold Restart blocks OB21/OB22 or insert
them
Check the program with STATUS
Error Diagnostics
Action
5-11