Omron CRT1 - 10-2008, Operation Manual

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Features of CompoNet Slave Units Section 1-1
1-1 Features of CompoNet Slave Units
1-1-1 Overview
CompoNet Slave Units do not simply input and output ON/OFF signals, they
can also collect a variety of information that can improve equipment operating
rates.
They can also be used to build maintenance systems separate from control
systems. Coexisting control and maintenance systems can contribute to
reducing equipment startup time, recovery time after problems, and preventa-
tive maintenance of equipment.
■ Control System:
For remote I/O communications with the PLC, I/O is allocated for each node
address by default. In addition, Slave Unit status information other than I/O is
allocated in an input area in the Master Unit. The allocation can be set using
the CX-Integrator or explicit messages.
■
Maintenance System:
Slave Units can store several kinds of equipment data. This data can be read
from or written to the Slave Unit’s memory using the CX-Integrator or by send-
ing explicit messages from the Master Unit (PLC) to the Slave Unit.
1-1-2 Features of CompoNet Slave Units
CompoNet Slave Units have the following features.
Main Features
The functions that can be used depend on the type of Slave Unit. For details,
refer to
1-1-3 CompoNet Slave Unit Functions .
Operation Time Monitor The Slave Unit can quickly measure the ON/OFF timing of input and output
contacts without relying on the ladder program. Contact types (IN - OUT, OUT
- IN, IN - IN, OUT - OUT) and trigger patterns (ON
→
OFF, OFF
→
ON, ON
→
ON, OFF
→
OFF) can be freely combined for measurement. A time can be
set in the Slave Unit memory to enable notification of the status when the
measured time exceeds the set time.
This data can be set or read by using the CX-Integrator.
Contact Operation
Monitor The number of times each input contact or output contact is turned ON can be
counted at a sampling frequency of 50 Hz maximum and stored. A value can
also be set in the Slave Unit to enable notification of the status if the number
of contact operations reaches the set value.
This data can be set or read by using the CX-Integrator.
Note The contact operation monitor and the total ON time monitor can-
not both be used for the same contact at the same time.
Total ON Time Monitor The total ON time of sensors, relays, and other devices are stored in the Slave
Unit memory. A value can also be set in the Slave Unit to enable notification of
the status if the total time reaches the set value.
These values can be set or read by using the CX-Integrator.
Note The total ON time monitor and the contact operation monitor can-
not be used at the same time for the same contact.
Automatic Baud Rate
Detection The baud rate is automatically set to the same baud rate as the Master Unit;
therefore, there is no need to set the baud rate of the Slave Units.