Siemens SIMATIC S7 FH - Page 327

Fail-Safe Blocks
Fail-Safe Systems
A5E00085588-03
8-139
Error Code (W#16#...) Cause Remedies
Error Detected in F_TESTC – Background Self-Tests of the CPU
Error Code (W#16#...) Cause Remedies
75E1H
Error during self-test of the CPU, or Error due to
online modification of the Safety Program, or
internal CPU fault
Check whether tests of the F-
CPU have been switched off
by SFC90 H_CTRL. The tests
must not be switched off.
Insure that the F-CPU’s Test
Cycle Time has been set <
12h in CPU’s “H Parameters
properties.
-or-
• Restart the Shutdown
logic.
-or-
• Stop and ColdStart F-
CPU.
-or-
• Full Download of the
complete program to F-
CPU.
-or-
• Replace the F-CPU.