Omron NXR Series User Manual page 97

Applicable Hubs
• Sensor power supply short circuit detection
All models of the Digital I/O Hub
• External load short circuit detection
Digital I/O Variable Hub only
Function Details
This function detects sensor power supply short circuit from input and external load short circuit from
output.
 I/O Cable Short Circuit Detection Points
Short circuit type
Pin 4 external load short circuit
Pin 2 external load short circuit
Sensor power supply short circuit Between power supply +(V) and power supply -(G)
Precautions for Correct Use
The Digital I/O Variable Hub outputs power +(V) to pin 1 of the port regardless of the I/O setting.
If the I/O setting is set to output and a short circuit occurs between power supply +(V) and pow-
er supply -(G), the function detects sensor power supply short circuit.
 How the Short Circuit Detection Works
If the function detects short circuit, the following bits of process input data turn ON and the I/O
Cable Short-circuit (7710 hex) device event occurs. Also, the status appears in the Pin 4/Pin 1 sta-
tus indicator or Pin 2 status indicator.
Refer to Process Input Data of each Hub in 6-1 Process Data on page 6-2 for details on the proc-
ess input data.
Short circuit type
Pin 4 external load short circuit
Pin 2 external load short circuit
Sensor power supply short circuit
*1. £ refers to port numbers 1 to 8.
Each short circuit detection bit turns OFF when the cause of the short circuit is removed.
On the other hand, each short circuit detection hold bit remains ON after the cause of the short cir-
cuit is removed. Refer to Turning OFF the Short Circuit Detection Hold Bits on page 7-8 for how
to turn off the bits.
NXR-series IO-Link I/O Hub User's Manual (W620)
Detection point
Between pin 4 and power supply -(G)
Between pin 2 and power supply -(G)
Bit which turns ON
•
Smart Status Port£ Status Summary Bit
•
Port£ Status Pin4 External Load Short Circuit Detection Bit
•
Port£ Status Pin4 External Load Short Circuit Detection Hold Bit
•
Smart Status Port£ Status Summary Bit
•
Port£ Status Pin2 External Load Short Circuit Detection Bit
•
Port£ Status Pin2 External Load Short Circuit Detection Hold Bit
•
Smart Status Port£ Status Summary Bit
•
Port£ Status Sensor Short Circuit Detection Bit
•
Port£ Status Sensor Short Circuit Detection Hold Bit
7 Functions of IO-Link I/O Hubs
*1
7
7-7