Omron DRT2 SERIES DEVICENET SLAVES - OPERATION MANUAL 04-2008 Operation Manual page 94

Functions of General-purpose Slaves and Environment-resistive Slaves
I/O Indicator Status when
Disconnection is Detected
Setting Using the
DeviceNet
Configurator
1,2,3...
When a disconnection is detected, the Sensor Disconnected Flag in the Sta-
tus Area will turn ON. The Configurator or explicit messages can be used to
read the status of the Sensor Disconnected Flag, and to read the status of the
disconnected contact.
The Configurator or explicit messages can be used to enable or disable the
sensor disconnected detection for each contact. (Sensor disconnected detec-
tion is disabled in the factory setting.)
Disconnection of the signal line for three-wire sensors cannot be detected by
this function. (A disconnected power line can be detected, however.) Discon-
nection may be falsely detected for sensors (dry contacts such as limit
switches or relays, and some other two-wire proximity sensors) with a current
consumption of 0.3 mA or lower (0.5 mA or lower for Environment-resistive
Terminals), so always disable this function when using these sensors.
Environment-resistive Terminal, Screw-less Clamp
Terminal
Discon-
nected
Sensor
Environment-resistive Terminals
-A
Flashing
red.
The box indicates the number of the corresponding connector.
Note 1. Refer to SECTION 6 Environment-resistive Slaves for the position of the
actual indicator.
2. For 16-point Input Units, the settings cannot be set to both enable and dis-
able within the same connector.
3. After a sensor disconnection is detected, a delay of up to 1.2 s will occur
before the Sensor Disconnected Flag turns ON.
Screw-less Clamp Terminals
0 to 15
Flashing
red.
The method used to set values from the DeviceNet Configurator (Ver. 2.20 or
later) is described here.
1. Turn ON the power to the DRT2-series Smart Slave.
2. From the Main Window, open the Network Configuration Window and dou-
ble-click or click the right mouse button over the icon of the DRT2-series
Smart Slave to be set. Select Parameter and Edit to display the Edit De-
vice Parameters Window.
Is the sensor
connected properly?
-B
OFF
Section 4-3
73