4-3-10 External Load Disconnected Detection - Omron DRT2 SERIES DEVICENET SLAVES - OPERATION MANUAL 04-2008 Operation Manual

Functions of General-purpose Slaves and Environment-resistive Slaves

4-3-10 External Load Disconnected Detection

Function Overview
Automatic Recovery Mode
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cuit recovery mode and click the OK Button.
4. Select the General Tab, click the Download Button, and then click the Re-
set Button to reset the Unit.
5. Click the OK Button.
DRT2-OD@@SLH(-1) and DRT2-MD32SLH(-1)
This function monitors the current consumption for the external load and
detects an external load disconnection if the current drops below a set value.
(See note.) The indicators on the Slave can be used to check which contacts
have been detected. (See below.)
When a disconnection is detected, the External Load Disconnected Flag in
the Status Area will turn ON. The External Load Disconnected Flag can be
read by using the Configurator or explicit messages. Information on the con-
tacts that are disconnected can also be read.
The Configurator or explicit messages can be used to enable or disable this
function for each set of contacts. (External load disconnected detection is dis-
abled in the factory setting.)
There are two recovery methods that can be used when an external load dis-
connection is detected: automatic or manual. The Configurator or an explicit
message can be used to set the recovery method to automatic or manual.
(The factory setting is for manual recovery.)
Note If an external load with low current consumption is connected, a disconnection
may not be detected. Disable this function when the output current is 3 mA or
less.
Screw-less Clamp Terminal
Disconnected
Bulb, etc.
Recovery is automatic when the wiring is corrected.
External load connection OK?
Section 4-3