Omron NXR Series, User Manual

Page: 98 / 134

The Pin 4/Pin 1 status indicator or the Pin 2 status indicator operates according to the status of
each relevant short circuit detection bit. The short circuit detection hold bits are irrelevant to indica-
tor display.
Refer to
8-4 Checking for Errors and Troubleshooting with the Device Events on page 8-9 for de-
tails on the device events.
Refer to
3-2 Indicators on page 3-4 for information on the indicator display.

Turning OFF the Short Circuit Detection Hold Bits
Each short circuit detection hold bit remains ON after the cause of the short circuit is removed. To
turn OFF the bits, remove the cause of the short circuit and perform either of the following opera-
tions a to c. The operations a and b configure the relevant data in the service data through mes-
sage communications from the Controller to the IO-Link device. Refer to the
NXR-series IO-Link
Master Unit for EtherNet/IP User’s Manual (Cat. No. W619) for details on how to access the service
data through message communications. Refer to 6-2 Service Data on page 6-9 for details on the
service data.
a. Execute a relevant short circuit detection hold reset
Write 01 hex: reset in the following service data.
This turns OFF the short circuit detection hold bits.
Service data
*1 Index (Dec) Subindex (Dec) *1
Port £ Pin4 External Load Short Circuit Detection Hold Reset 74 £
Port
£
Pin2 External Load Short Circuit Detection Hold Reset 76
£
Port
£
Sensor Short Circuit Detection Hold Reset 78
£
*1.
£
refers to port numbers 1 to 8.
b. Execute all hold bits reset
Refer to 7-1-4 All Hold Bits Reset on page 7-8 for information on executing all hold bits reset.
c. Cycle the Unit/input power supply

Short-circuit Protection
The protective functions for external load short circuit and sensor power supply short circuit protect
internal circuits only from short circuit for a short period. The short circuit protection for the Hubs is
based on thermal shutdown method. Decreased temperature of the output element to protect will
cause the output to automatically turn ON. Without the cause of short circuit removed, the output
and the power supply to sensor will repeat turning ON and OFF. Leaving the cause of short circuit
not removed will result in deterioration of output elements. If a short circuit occurs, immediately turn
OFF the relevant output and power supply to the sensor, then remove the cause of the short circuit.
Setting Method
There is no setting for this function.
7-1-4
All Hold Bits Reset
This section describes the all hold bits reset.
7 Functions of IO-Link I/O Hubs
7-8
NXR-series IO-Link I/O Hub User’s Manual (W620)