Memory Submodule Evaluation - Siemens SIMATIC S5 CP 521 Manual

Notes on Operation
4.1.2

Memory Submodule Evaluation

The parameters of the serial interface and message texts specified on the module
are checked here. Errors with the appropriate number in byte 0 of the PII
"Module status" can be evaluated in the control program.
Table 4-2. Memory Submodule Errors
Contents
of byte 0
of the PII
X1 Memory submodule fault or no
H
memory submodule plugged in
X2 No message texts configured
H
X: The other half of the byte may have different values; not significant here
4.1.3 Clock Test
This part tests the module's real-time clock. The clock is set when the battery
backup fails during POWER OFF of the PC. The clock has the default setting
12.00.00 01.01.89.
Errors and the default setting are provided with the appropriate number in byte
0 of the PII "Status of the module" and can be evaluated in the control program.
4-2
Error
1. PC POWER OFF
2. Plug in (new) memory
3. PC POWER ON
Configure messages. -
Wrong or defective memory
submodule plugged in?
Remedy
submodule
GWA 4NEB 812 6030-02b
CP 521