Omron DRT2 Series Operation Manual page 20

DRT2 Features
Slave Comments
I/O Comments
Communications Error
History Monitor
Last Maintenance Date
Remote I/O Terminal and Environment-resistive Terminal Features
No Internal Circuit Power
Supply Wiring for Slaves
I/O Power Status Monitor
Input Filter
Power ON Delay
Contact Operation
Counter
Total ON Time Monitor
Remote I/O Terminal Features
Smallest Class Available
Detachable Terminal
Block
Expansion Units
User-set names can be assigned and saved in the Slave for each Unit.
User-set names can be assigned and saved in the Slave for each of the I/O
contacts, such as sensors or valves, that are connected to the Slave.
The error statuses (communications error cause code and communications
power supply voltage when error occurred) for the last four communications
errors that occurred can be recorded in the Slave. The Configurator or explicit
messages can be used to read the information.
The dates on which maintenance is performed can be written to the Unit using
the Configurator.
The communications power supply is used for the internal circuit power for the
Unit. This eliminates the need to wire the Unit's internal circuit power supply.
The I/O Power Status Monitor is used to detect whether the I/O power supply
is connected and provide notification in the Status Area. The Configurator or
explicit messages can be used to read the information.
The input filter is used to read the input value several times during the set
interval and remove irregular data caused by noise and switch chattering.
This function can also be used to create ON/OFF delays.
The I/O power supply can be monitored to stop any input when the I/O power
is OFF and for 100 ms after it is turned ON. This function prevents incorrect
inputs caused by inrush current at startup after the I/O power is turned ON.
The number of times each input or output contact changes from OFF to ON
can be counted (maximum resolution: 50 Hz). The Configurator or explicit
messages can be used to read the information. The Slave also maintains a
set value for monitoring the number of contact operations, and will provide
notification in the Status Area if the set value is reached.
Note The Contact Operation Counter and Total ON Time Monitor cannot be used at
the same time for a single contact.
This function is used to total and record in the Slave the time that devices,
such as sensors and relays, that are connected to the Slave are ON. The
Configurator or explicit messages can be used to read the information. The
Slave also maintains a set value for monitoring the total ON time, and will pro-
vide notification in the Status Area if the set value is reached.
Note The Total ON Time Monitor and Contact Operation Counter cannot be used at
the same time for a single contact.
The width of a Basic Unit is 115 mm (77% of the previous DRT1 Series, which
were 150 mm), and the width of the Expansion Unit is 94 mm, totaling
209 mm even when the Basic Unit is expanded, which makes it the smallest
class of size available.
The terminal block can be detached.
A Basic Unit can be combined with an Expansion Unit. The various I/O combi-
nations that are possible, such as 16 inputs and 8 outputs, or 24 inputs (16
inputs plus 8 inputs), increase the system configuration possibilities.
Section 1-1
3