drt2_devicenet_q102-e1_20_22_csm2147.pdf - 第36页

16 Smart Slaves DRT2 Series Smart Slave Functions ● Network P ower V oltage Monitor The present, bottom, and peak values of the Network power v oltage can be recorded in the Slave . Also, the monitor v oltage can be set …

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Smart Slaves DRT2 Series 15
OK: Function supported, ---: Function not supported.
* The operation time monitor can be used with the DRT2-@D04CL(-1).
Notice: The contact operation counter function and the total ON time monitor function cannot be used simultaneously for the same contact.
Function
Environment-resistive Slaves
Analog Slaves
Analog I/O Terminals
Temperature
Input Terminals
Advanced Model Standard Model DRT2-AD04 DRT2-AD04H DRT2-DA02
Input Output Input Output I/O Input Output Input
Operation time monitor --- --- * OK --- ---
Contact operation counter OK --- ---
Unit conduction time monitor OK OK OK
Total ON time monitor OK --- ---
Unit comments OK OK OK
Connected device comments OK OK OK
Network power supply voltage monitor OK OK OK
I/O power supply monitor --- OK OK --- ---
Communications error log --- OK OK OK OK
Input filter OK --- OK --- OK --- ---
Power-ON inrush current protection OK --- OK --- OK --- ---
Sensor power supply short-circuit
detection
OK --- --- --- ---
External load disconnection detection OK --- --- --- ---
External load short-circuit detection --- OK --- --- ---
Disconnected sensor detection --- --- ---
Removable terminal block --- OK OK
Communications speed auto-detect OK OK OK
No need to wire Unit power supply OK OK OK
No need to wire input device power
supply
OK --- --- --- ---
Expansion via Expansion I/O Units --- --- ---
Scaling --- OK OK
User compensation --- OK OK
Last maintenance date OK OK OK
Cumulative counter --- OK OK
Moving average processing --- OK OK --- OK
Number of A/D conversion points
(conversion cycle) setting
--- OK --- --- ---
Peak/bottom hold --- OK OK --- OK
Top/valley hold --- OK OK --- OK
Percentage change calculation --- OK OK --- OK
Comparator --- OK OK --- OK
Selectable output value after error --- --- --- OK ---
Top/valley count --- --- OK
Operating time in preset temperature --- --- OK
Temperature difference detection
between input channels
--- --- OK
16 Smart Slaves DRT2 Series
Smart Slave Functions
● Network Power Voltage Monitor
The present, bottom, and peak values of the Network power voltage
can be recorded in the Slave. Also, the monitor voltage can be set
using the CX-Integrator to maintain the monitor voltage in the slave
(default setting: 14 V), and a Status Area in the Unit will turn ON if
the voltage falls below the monitor voltage.
● Unit Conduction Time Monitor
The total ON time of the Slave's internal circuit power can be
calculated and recorded. (The CX-Integrator or explicit messages
can be used to read the information.)
Also, the monitor value can be maintained in the Slave, and a Status
Area will turn ON in the Unit when the total time reaches the set
value.
● Unit Comment Function
The user can assign and record a name or comment for every Unit
(up to 32 characters).
● Connected Device Comment Function
The user can assign a name for each of the Unit's I/O contacts (up to
32 characters) and record it in the Unit. The connected device can be
checked for each I/O contact, allowing faulty devices to be identified
during remote maintenance.
● Communication Error History Monitor
The error status information (communications error code and
communications power voltage when the error occurred) for the last
four communications errors that occurred can be recorded in the
Slave.
● Last Maintenance Date
This function enables writing to the Unit the date on which
maintenance was last performed. This means that the timing for
future maintenance can be judged more easily.
● Contact Operation Count Monitor Function
The Contact Operation Counter is used to count the number of times
each input or output contact changes from OFF to ON (maximum
sampling cycle: 50 Hz) and record the total value calculated in the
slave. (The CX-Integrator or explicit messages can be used to read
the information.)
The monitor value can be set in the slave, and when the set number
of operations is reached, a bit in the Status Area in the Unit will be
turned ON. (The CX-Integrator or explicit messages can be used to
read the details of the notification.)
• Counted operations: 0 to 4,294,967,295 operations
(Stored data: 0000 0000 to FFFF FFFF hex)
• Counting unit: One operation
Note 1: The Contact Operation Counter and Total ON Time Monitor cannot be used
at the same time for the same contact. Select the function to be used under
the Detection Mode heading.
Note 2: The Contact Operation Counter will operate only when the I/O power is ON.
Recorded in Slave
Total ON time
Total ON time
Internal circuit power
ON
OFF
DeviceNet
Slave
Slave
Unit comment
Recorded in Unit
CX-Integrator
DeviceNet
Unit comment
Slave
Connected device
comment
Recorded in Slave
CX-Integrator
DeviceNet
Connected device
comment
Connected device
Status when
communications error
occurred
Slave
Recorded in Slave
First error
Second error
Third error
Forth error
DeviceNet
ON
OFF
123
Slave
OFF
→
ON
Number of
operations
I/O power
Output device
(relay, etc.)
Recorded
in Slave
Number of times
output contact
changes to ON.
Smart Slaves DRT2 Series 17
● Total ON Time Monitor Function
The total ON time for each I/O contact can be calculated (unit: s) and
recorded in the Slave. (The CX-Integrator or explicit messages can
be used to read the information.)
The monitor value can be set in the Slave, and when the set total
time is reached, a bit in the Status Area in the Unit will be turned ON.
(The CX-Integrator or explicit messages can be used to read the
details of the notification.)
• Counted time:0 to 4,294,967,295 seconds
(stored data: 0000 0000 to FFFF FFFF hex)
• Counting unit: One second
Note 1: The Contact Operation Counter and Total ON Time Monitor cannot be used
at the same time for the same contact. Select the function to be used under
the Detection Mode heading.
2: The Total ON Time Monitor operates only when the I/O power is ON.
3: The Total ON Time Monitor checks approximately every second whether the
connected devices are ON.
If the total ON time is calculated for ON times of less than a second, the
measurement may not be accurate.
● Input Filter Function
This function can read the input value several times within a preset
period and reduce the influence of incorrect signals due to switch
chattering or data corrupted by noise. The input filter function can
also be used for ON delay operation and OFF delay operation.
● Function to Prevent Incorrect Inputs Caused by Inrush
Current when Power Is Turned ON (input only)
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
reduces incorrect inputs caused by inrush current for 100ms after the
I/O power is turned ON.
● I/O Power Status Monitor Function
This function is used to detect whether the I/O power is ON.
When the I/O power supply
is turned OFF, a bit in the
Status Area in the Unit is
turned ON. (The
CX-Integrator or explicit
messages can be used to
read the content of the
notification.)
Note: The value for detecting a low
voltage for the I/O power
cannot be set.
● Sensor Power Short-circuit Detection Function (input
only)
The sensor power supply current can be monitored, and when the
current reaches or exceeds 100 mA per input contact, a sensor
power short-circuit is detected.
Check whether a sensor power short-circuit has been detected using
the indicators on the slave. When a sensor power short-circuit is
detected, a bit in the Status Area in the Unit will turn ON. (The
CX-Integrator or explicit messages can be used to read the details of
the notification.) The sensor will automatically recover when the
cause of the short-circuit is removed, and the power output to the
connector where the short-circuit was detected will turn ON.
Note: Use a Power Supply Unit with a rated power supply of 50 W or higher for the
communications power supply. A short-circuit is detected when the Unit's
sensor power output current reaches or exceeds 100 mA per input connector.
When a short-circuit occurs, the communications power supply may be
temporarily interrupted. After a short-circuit has been detected, the power will
be automatically restored, but during the power interruption use an external
circuit in the configuration to make sure the system is operating safely.
Use the following equations to calculate the sensor's current consumption.
• Total network current = Total Unit current consumption + Total sensor
current consumption
• Communications power supply capacity (Total network current +
Short-circuit detection current) x (=100 mA) x (DeviceNet network voltage)
●
External Load Short-circuit Detection Function (output only)
The load current of the Output Unit can be monitored, and an
external load short-circuit can be detected when the current exceeds
a set value per contact (or per common). When an external load
short-circuit is detected, the output is turned OFF to prevent damage
to the Unit's output circuit. The LED indicators on the Slave Unit can
be used to check which contact has been detected as having an
external load short-circuit. When an external load short-circuit is
detected, a bit in the Status Area in the Unit will turn ON. (The
CX-Integrator or explicit messages can be used to read the details of
the notification.)
Manual recovery is the only way to remove the cause of the
short-circuit.
Note: The OMRON S8@@ Power Supply Unit is recommended for the I/O power
supply.
If a Power Supply Unit with a dropping overcurrent protection characteristic is
used, the load short-circuit may not be detected. Always use a Power Supply
Unit with a rating of 100 W or higher if it uses a dropping overcurrent protection
characteristic.
ON
OFF
Slave
To ta l
ON time
Connected device
I/O power supply
Sensor
Total
ON time
Stored in
Slave
ON
ON
1234
OFF
Data input
ON
OFF
OFF OFF ON
ON
ON
1234
OFF
Data input
ON delay time
(Equal to the input filter time.)
ON
OFF
ON ON ON
The signal is
considered OFF
because all four
readings were
not ON.
The signal is
considered ON
because all
four readings
were ON.
Slave
I/O
power voltage
I/O power
Sensor
Monitors whether
I/O power is ON.
Slave
Has the sensor
power shorted?
Sensor
Short-circuit
Slave
External load
Output forced OFF
Short-circuit
Has the external
load shorted?