Omron NXR Series, Руководство пользователя

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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 Detection point
Pin 4 external load short circuit Between pin 4 and power supply -(G)
Pin 2 external load short circuit Between pin 2 and power supply -(G)
Sensor power supply short circuit Between power (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 (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
Bit which turns ON
*1
Pin 4 external load short circuit
•
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
Pin 2 external load short circuit
•
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
Sensor power supply short circuit •
Smart Status Port
£
Status Summary Bit
•
Port
£
Status Sensor Short Circuit Detection Bit
•
Port
£
Status Sensor Short Circuit Detection Hold Bit
*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.
7 Functions of IO-Link I/O Hubs
7-7
NXR-series IO-Link I/O Hub User’s Manual (W620)
7-1
Functions of Digital I/O Hubs
7
7-1-3
I/O Cable Short-circuit Detection