CRT1-ATT01 Omron, CRT1-ATT01 Datasheet - Page 20

• Manufacturer Part Number: CRT1-ATT01
• Description: Bracket 16 Pt Slave MIL
• Manufacturer: Omron

Specifications of CRT1-ATT01

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Input data
ON
OFF
● Total ON Time Monitor (Digital I/O Slave, Bit Slave
This function totals the time that each input and output contact is
ON (unit: s) and stores this total time in the Slave Unit memory.
(This data can be read using the CX-Integrator or using explicit
messages.)
A monitor value can also be stored in the Slave Unit memory so
once the set total time has been reached, a flag in a status area
in the Slave Unit turns ON to notify the Master Unit. The notifica-
tion details can be read using the CX-Integrator or using explicit
messages.
Note 1. The total ON time monitor and the contact operation monitor cannot
● Input Filter (Digital I/O Slave, Bit Slave Input Units
Input values can be read more than once during the set time
interval to eliminate data emissions due to noise and switch chat-
tering. An ON delay or OFF delay can also be implemented
using this function.
20
ON
OFF
Stored in Slave
Unit memory
• Measurement time: 0 to 4,294,967,295 s (Stored data: 0000
• Measurement unit: s
Input Units Only)
0000 to FFFF FFFF Hex)
Only)
2. This function does not operate if the I/O power is not turned ON.
3. The Total ON Time Monitor Function checks at 1 second intervals
ON OFF OFF ON
1
both be used for the same contact at the same time. Select only one
of these functions under the Detection Mode.
whether or not the connected device is turned ON.
Keep this in mind when measuring total ON times for inputs of less
than 1 s.
2
Sensor
3
Connected device
CRT1-series Smart Slave Units
Total ON time
Total ON time
4
The internal
input data
remains OFF
because the
read input data
was not ON all
4 times.
Slave Unit
I/O power supply
ON
OFF
Input data
ON
OFF
ON
1
ON delay
(= input filter time)
ON ON ON
2
3
4
The internal
input data
turns ON
because the
read input
data was ON
all 4 times.
ON
OFF
● Error Prevention for Surge Current at Startup (Digital
This function can be used to prevent reading inputs while the I/O
power is OFF and for 100 ms after the I/O power is turned ON
(i.e., until the Slave Unit stabilizes). It helps avoid input errors
caused by inrush current from connected devices when the I/O
power supply is turned ON. This function is enabled or disabled
by the CX-Integrator or by explicit messages.
● I/O Power Status Monitor (Digital I/O Slave Units Only)
The I/O power status monitor function can be used to detect
whether the I/O power is ON.
When the I/O power is turned OFF, a flag in a status area in the
Slave Unit turns ON to notify the Master Unit. The notification
details can be read using the CX-Integrator or using explicit mes-
sages.
Note: A detection voltage cannot be set for the I/O power supply.
● Sensor Power Short-circuit Detection (Bit Slave Units
This function monitors the sensor power supply current. If the
current is 100 mA or higher per input contact, a power short-cir-
cuit is detected.
The I/O power for the Slave Unit turns OFF if a short-circuit is
detected for even just one of the contacts being used.
The Slave Unit SHT0 indicator can be used to check whether a
power short-circuit has been detected. When a sensor power
short-circuit is detected, a flag in a status area in the Slave Unit
turns ON to notify the Master Unit. The notification details can be
read using the CX-Integrator or using explicit messages. When
the cause of the short-circuit is removed, the Slave Unit is auto-
matically reset, and the power output to the connector that had
the short-circuit is turned ON again.
Note: Use a power supply rated 100 W or higher as the communications power
I/O Slave Units and Bit Slave Input Units Only)
Only)
supply. A short-circuit is detected if a current of 80 mA or more flows for
two inputs in the Unit's sensor power output. The communications power
supply may be temporarily cut if a short-circuit occurs. The Slave Unit is
automatically restored after the cause of the short-circuit has been re-
moved but external circuits must also be created to ensure safe system
operation while the power is disconnected. Use the following formulas as
a guide for calculating the sensor current consumption.
• Total network current = Total Unit current consumption + total sensor
• Communications power capacity used ≥ {total network current + (short-
current consumption
circuit detection current = 80 mA)} ¥ (CompoNet network voltage)
Sensor
Slave Unit
Short-circuit
Sensor
I/O power
supply voltage
Slave Unit
I/O power supply
Monitors whether or not the
I/O power supply is ON.
Short-circuits in the
sensor power supply
can be detected.