Omron GRT1 - 27-11-2006, Руководство по эксплуатации

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GRT1-PRT PROFIBUS Communication Unit
Section 1-2
1-2 GRT1-PRT PROFIBUS Communication Unit
1-2-1 Features
The GRT1-PRT PROFIBUS Communication Unit for SmartSlice I/O controls
data exchange between the PROFIBUS DP-V1 Master and SmartSlice I/O
Units over the PROFIBUS DP network. For an overview of the PROFIBUS
technology refer to
Appendix A PROFIBUS Technology
.
Manage Multiple
SmartSlice I/O Units as
One Slave A single PROFIBUS Communication Unit with up to 64 connected SmartSlice
I/O Units can be managed as a single slave device from the PROFIBUS DP-
V1 Master.
I/O Data Exchange Cyclic I/O data exchange is used to exchange I/O data between the PROFI-
BUS Master and SmartSlice I/O Units through the PROFIBUS Communica-
tion Unit. In addition to I/O data, various status information in the PROFIBUS
Communication Unit as well as in the individual I/O slices can be accessed
from the PROFIBUS DP-V1 Master Unit.
Simplified Startup The PROFIBUS Communication Unit can be set up easily, just by wiring the
Unit, setting the PROFIBUS station address on the Unit’s rotary switches, and
making simple DIP switch settings.
The Unit’s configuration is read automatically when the power is turned ON
and I/O is also automatically allocated in the SmartSlice I/O Units. It is not
necessary to make any settings with a special Programming Device.
Simplified I/O Wiring All of the SmartSlice I/O Units that connect to a PROFIBUS Communication
Unit are equipped with screw-less clamp terminal blocks. Wiring to external
I/O is accomplished just by inserting the wire into the terminals, eliminating
the need to tighten terminal screws.
Table Registration The configuration of the SmartSlice I/O Units (mounting order and I/O size)
connected to a PROFIBUS Communication Unit can be registered in a table
simply by switching a pin on the PROFIBUS Communication Unit’s DIP
switch. Once the table has been registered, the actual configuration is com-
pared to the registered configuration each time that the power is turned ON. If
the configuration does not match, a status flag can be turned ON in the
PROFIBUS DP-V1 Master to indicate the error.
Communication Error Log
Monitor The communication error log in the PROFIBUS Communication Unit can
record the four most recent communication errors in the PROFIBUS DP net-
work and the 64 most recent SmartSlice I/O Unit errors. The communication
error information (communication error cause code and communication power
supply voltage when error occurred) can be read with an explicit message
command or from the Configurator.
Online Replacement of I/O
Units The SmartSlice I/O Unit’s circuit section can be removed, so it is not neces-
sary to turn OFF the power to replace a Unit. Communication can be main-
tained in the remaining (connected) Units.
Parameter Backup and
Restore Before replacing a SmartSlice I/O Unit for maintenance, the parameter data
set in the I/O Unit can be backed up in the PROFIBUS Communication Unit
by switching a pin on the Communication Unit’s DIP switch. After the I/O Unit
has been replaced, another DIP switch operation can be used to select the
mode that automatically writes the backed-up parameter data to the appropri-
ate Units.