Omron CRT1 - 10-2009, Operation Manual

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3
Features of CompoNet Slave Units
Section 1-1
Unit Conduction Time
Monitor The total ON time of the Slave Unit's internal circuit power supply can be
stored. This value can be read using the CX-Integrator or explicit messages. A
value can also be set in the Slave Unit to enable obtaining notification of the
status if the total time reaches a set monitor value.
This data can be read or written by using the CX-Integrator.
Naming Units The user can set any name for each Unit as a comment. The names are
stored in Slave Unit memory.
This data can be read or written by using the CX-Integrator.
Naming Connected
Devices Any name can be set for each I/O contact (e.g., sensor or valve) connected to
a Slave Unit. The names are stored in Slave Unit memory.
This data can be read or written by using the CX-Integrator.
Network Power Voltage
Monitoring The network power supply voltage (present, maximum, and minimum values)
can be stored in the Slave Unit memory. A monitor voltage can also be set in
the Slave Unit to enable notification of the status if the voltage drops to the
preset value.
These values can be set or read by using the CX-Integrator.
I/O Power Status Monitor The I/O power status monitor function checks if the I/O power is ON or not,
and provides notification in a status area.
This data can be checked by using the CX-Integrator.
Communications Error
History Monitor Enables storing the error condition (communication failure details, the com-
munications power supply voltage at the time of failure, and the Unit conduc-
tion time) for the most recent 4 communication failures, within the slave unit.
This data can be read by using the CX-Integrator.
Input Filters The Slave Units read input values multiple times during the set period to elim-
inate the effect of switch chattering and data omissions caused by noise. An
ON delay or OFF delay can also be implemented by using this function.
These settings are made by using the CX-Integrator.
Communications Error
Output Setting The output value when a communications error occurs can be set for each
word of an Output Unit.
These settings are made by using the CX-Integrator.
Preventing Malfunctions
Caused by Inrush Current
at Startup This function holds inputs from when the power is turned ON until the Unit sta-
bilizes, i.e., inputs are not received while the I/O power is OFF and for 100 ms
after the I/O power is turned ON. This contributes to eliminating input errors
caused by inrush current when the I/O power is turned ON.
These settings are made by using the CX-Integrator.
Power Short-circuit
Detection The I/O power current is monitored. If an excessive current is detected, it is
assumed that a power short-circuit has occurred and the sensor power output
is turned OFF forcibly.
The status can be checked by using the LED indicators on the Slave Unit or
by using the CX-Integrator.
Load Short-circuit
Detection The output load current is monitored. If an excessive current is detected, it is
assumed that an load short-circuit has occurred and the output is turned OFF
forcibly to prevent damage to the Unit's output circuit.
The status can be checked by using the LED indicators on the Slave Unit or
by using the CX-Integrator.
Removable Terminal Block The terminal block can be removed.