Murr Elektronik CUBE20S PROFINET IO User Manual

PROFINET IO
User manual 57106_hdb_en_13 73 / 94
11.6 FMM - Free Module Mapping
11.6.1 Overview
 FMM can be used to operate the same user program with a standard hard-
ware configuration on different extension levels without detecting a nomi-
nal/actual difference of the hardware.
 PROFINET IO devices of Murrelektronik support the functions of FMM.
Activating FMM (by default, FMM is deactivated)
 Activate FMM in the parameterization in the PROFINET IO device.
For further information on the parameterization, refer to 11.3.3 Access to
parameter data, Seite 63.
 Define the mapping of the ports for the FMM via the data record 0x7F.
 Activate the parameter Startup when nominal/actual configuration dif-
fer in the CPU.
Result:
The PROFINET IO device transmits the FMM mapping to the CPU during
commissioning.
If FMM is activated and correctly configured, the system shows the following
behavior:
 During commissioning, no difference between the nominal and the actual
state of the hardware is diagnosed.
 Output data of missing modules are ignored and are not output.
 Input data of missing modules are set to 0.
11.6.2 Configuration
 The data record 0x7F with a size of 64 bytes determines the mapping of
the modules as a configuration.
 The PROFINET IO device saves the data record in a remanent manner. It
is therefore not sent to the PROFINET IO device by the PROFINET con-
troller when establishing the connection.
 Writing and reading the configuration is only possible if the FMM has pre-
viously been activated in the parameterization of the PROFINET IO de-
vice.
 The user program transfers the data record to the PROFINET IO device
through a write command.
 You can also use the data record read command to read parts of the active
configuration. But you always have to write the whole data record.
 Every written and valid configuration is only saved if there is a difference
to the actual configuration.
 The configuration is only applied after a restart.
 In the parameterization of the PROFINET IO device, you can define that
the PROFINET IO device is restarted when a configuration is received.
Otherwise a manual restart is required after the transmission of your con-
figuration.

Murr Elektronik CUBE20S PROFINET IO Specifications

General

Brand	Murr Elektronik
Model	CUBE20S PROFINET IO
Category	Control Unit
Language	English