Lenze 8400 StateLine - Manual (Page 570)

12 Fieldbus interface (MCI)
12.1 Process data transfer
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Lenze · 8400 StateLine · Reference manual · DMS 12.0 EN · 06/2014 · TD05/TD14
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Voltage supply
Depending on the complexity and functional range of the fieldbus, the communication modules are
supplied by the standard device or an external 24 supply at the module.
The external 24 V voltage supply of the communication module is required if the supply of the
standard device fails but the communication via the bus is to continue.
Parameter setting of the communication modules
All codes which must be parameterised for establishing the fieldbus communication are saved in
the memory module of the controller.
The archived data can be addressed by all bus systems supported by the controller.
Hotplug
The communication module (MCI module) can be plugged in/out while the controller is switched
on. When the module is plugged in, it is automatically detected and checked for plausibility
regarding the function and version.
Fieldbus-specific device profiles and PDO mapping
When specific bus systems are used, the controller is to behave according to a defined,
manufacturer-spanning standard. The following definitions have been made for this:
• Definitions of the device state machine (e.g. DSP402, DriveCOM, ProfiDrive etc.)
• Definition of the bit assignment of control and status words
• Definition of signal scaling (on a limited scale)
• Definition of parameter scaling (on a limited scale)
• Definition of the process data mapping
These device profiles are not mapped in the communication module since some definitions have a
strong effect on the device-internal behaviour and the device profiles are not uniform regarding this
matter.
• The task of the communication modules is
• to address parameters (SDOs),
• to transfer PDOs and
• the signal mapping of the PDOs.
• The process data objects (e.g. the meaning of the control word bits or the speed setpoint
stipulated) are interpreted in the drive controller.