Technical data

Organization blocks for reactions to device or
program errors
1)
Block Function and call criterion
Table 2-3 continued:
OB 34
Error in closed loop controller processing
(REG-FE)
OB 35
Communication error on the second serial
interface (FE-3)
OB 36 to OB 39
do not exist for the CPU 928B
1)
If the OB is not programmed, the CPU changes to the stop mode in the event of
an error.
EXCEPTION: if OB 23, OB 24 and OB 35 do not exist, there is no reaction.
2)
OB28 is called before the CPU changes to the stop mode. The CPU stops regard-
less of whether and how OB 28 is programmed.
EXCEPTION: OB28 is not called if the power is switched off.
Program, Organization and Sequence Blocks
CPU 928B Programming Guide
2 - 22 C79000-B8576-C898-01