General Information - Siemens SIMATIC S7 Product Information

CPU 417-4H
S
Transition to redundant system mode (see Section 10.3.6 for PCS7 or 10.5.6 for STEP7)
S
STEP7 only: Change and load organization blocks (see Section 10.5.8)
5.

General Information

The Following Table Lists the Differences between Operation of a Standard
S7-400 CPU and a CPU 417-4H
Function
Use of symbol-oriented
messages (SCAN)
Multicomputing (OB60, SFC35)
Startup without configuration
loaded
Insertion of DP modules in the
module slots for interface
modules
Connection of S5 modules via IM
or adapter casings
Self-test after POWER ON
Redundancy error OBs (OB70,
OB72)
Preset priority class for OBs 81 to
87
Response of the CPU upon
overflow of the start information
buffer in priority class 26
24
Standard S7-400 CPU
Yes
Yes
Yes, if no IMs, no CPs and
FMs are plugged in and no
expansion units are
connected
Yes
Yes
No
No
26
STOP (event W#16#4541)
CPU 417-4H in Separate
Operation or in
Redundant System Mode
No
No
No
No. The module slots are
only intended for the
synchronization
submodules.
No
Yes
Separate operation:Yes,
but no calls
Redundant Mode: Yes
25
Call OB80 in priority class
28. If OB not loaded,
STOP.
A5E00130864-03