8 Communication
YASKAWA ELECTRIC
SIEP C730600 89C YASKAWA AC Drive Option SI-EP3 Technical Manual
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8
Communication
This section describes the PROFINET IO messaging used in communication with the drive.
For detailed information on PROFINET IO communication, refer to PROFINET specification Application Layer
protocol for decentralized periphery and distributed automation v2.0 available at www.profibus.com.
Introduction to PROFINET IO
PROFINET IO is a fieldbus protocol that enables communication between programmable controllers and distributed
field devices in Ethernet network. The protocol classifies devices into IO controllers, IO supervisors and IO devices,
which have a specific collection of services.
PROFINET IO uses three different communication channels to exchange data. The standard UDP/IP and TCP/IP channel
is used for parameterization and configuration of devices and for acyclic operations. The Real Time (RT) channel is used
for cyclic data transfer and alarms. The third channel, Isochronous Real Time (IRT) channel, is used e.g. in motion
control applications (not implemented in SI-EP3).
PROFINET IO devices are structured in slots and sub-slots, which can contain modules and sub-modules
correspondingly. Devices can have almost any number of slots and sub-slots and they can be virtual or real. Device
specific data is represented in slot 0, module and sub-module specific data in subsequent slots and sub-slots.
One of the benefits of PROFINET IO is the diagnostics and alarm mechanism. Every module and sub-module provide
alarm data to the IO controller using the cyclic channel. Diagnostic data can be read non-cyclically from the device by
using record data.
Properties and services of a PROFINET IO device are described in a GSD file that is written in General Station
Description Markup Language (GSDML). GSD file describes the device specific modules and the method of assigning
modules and sub-modules to predefined slots and sub-slots.
PROFINET IO in SI-EP3
The decision to use either the PROFIdrive control and status words or the Yaskawa-specific control and status words is
done in a hardware configuration tool (customer supplied). The default value is the Yaskawa-specific format.
SI-EP3 uses slots 0 and 1. Slot 0 does not have any sub-slots and the attached DAP module represents the device. Other
functional modules and sub-modules described in the GSD file can be assigned to slot 1 and its sub-slots.
• Slot 0 = Device access point (DAP)
• Slot 1, sub-slot 1 = Standard telegram 1, Standard telegram 1 + 5 configurable inputs, outputs, Forty byte IO with 5
configurable input, outputs
The services provided by the SI-EP3 option can be defined using the F7-
parameters in the drive or by using a
configuration tool. To define the service using the F7-
parameters, set the parameter to a value other than 0.
If all F7-
parameters are set to 0, the value from the configuration tool will be used.
The SI-EP3 option provides the following services:
• Cyclic messaging in PROFIdrive or Yaskawa-specific mode
• Acyclic parameter access mechanism
• Identification & Maintenance functions (I&M0)
• PROFIdrive parameters
• Diagnostic and alarm mechanism
• Fault buffer mechanism
