Siemens SIMATIC S7-1200 - Page 165

Device configuration
6.4 Configuration control
S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
165
Behavior during operation
For the online display and for the display in the diagnostics buffer (module OK or module
faulty), STEP 7 uses the device configuration and not the differing real configuration.
Example:
A module outputs diagnostics data. This module is configured in slot 4, but is
actually inserted in slot 3. The online view indicates that configured slot 4 is faulty. In the real
configuration, the module at slot 3 indicates an error by its LED display.
If you have configured modules as missing in the control data record (0 entry), the
automation system behaves as follows:
● Modules designated as not present in the control data record do not supply diagnostics
and their status is always OK. The value status is OK.
● Direct writing access to the outputs or writing access to the process image of outputs that
are not present proceeds with no effect; the CPU reports no access error.
● Direct read access to the inputs or read access to the process image of inputs that are
not present results in a value "0" for each input; the CPU reports no access error.
● Writing a data record to a module that is not present proceeds with no effect; the CPU
reports no error.
● Attempting to read a data record from module that is not present resuls in an error
because the CPU cannot return a valid data record.
Error messages
The CPU returns the following error messages if an error occurs during writing of the control
data record:
Error code
Meaning
16#80B1
Invalid length; the length information in the control data record is not correct.
16#80B5 Configuration control parameters not assigned
16#80E2 Data record was transferred in the wrong OB context. The data record must be transferred in the
startup OB.
16#80B0 Block type (byte 2) of control data record is not equal to 196.
16#80B8 Parameter error; module signals invalid parameters, for example:
• The control data record attempts to modify the configuration of a communication module or a
communication annex card. The real configuration for communication modules and a communica-
tion annex card must equal the STEP 7 configuration.
• The assigned value for an unconfigured slot in the STEP 7 project is not equal to 255.
• The assigned value for a configured slot is out of range.
• The assigned configuration has an "internal" empty slot, for example, slot n is assigned and slot
n-1 is not assigned.