Operations For Errors; Setting Fail-Soft Operation; Errors To Which Fail-Soft Operation Applies - Omron NX-series User Manual

3-4-1

Operations for Errors

The following table describes the operation of the NX Bus Function Module when the NX Bus Function
Module is used with and without fail-soft operation.
Operating status
With fail-soft operation
Without fail-soft opera-
*1
tion
*1. When an error occurs, I/O refreshing for the NX Units on the Communication Control Unit that is not started,
i.e., I/O refreshing for the NX Units on the Controller that is stopped is called "entire stop".
Except for the I/O refreshing, the operation when an error occurs for the NX Bus Function Module is
the same regardless of whether fail-soft operation is used. Specifically, error notification is provided
and errors are recorded in the event log.
3-4-2

Setting Fail-soft Operation

Using Fail-soft Operation
To enable fail-soft operation, select the Communication Control Unit in the CPU and Expansion Racks
Tab Page on the Sysmac Studio and set the Fail-soft Operation Setting to Fail-soft operation.
The default for the Fail-soft Operation Setting for the NX Bus Function Module is Fail-soft
operation.
Not Using Fail-soft Operation
To disable fail-soft operation, select the Communication Control Unit in the CPU and Expansion Racks
Tab Page on the Sysmac Studio, and set the Fail-soft Operation Setting to Stop.
Precautions for Correct Use
• After you change the setting, always transfer the changed settings to the Communication
Control Unit.
3-4-3

Errors to Which Fail-soft Operation Applies

The following errors are examples of the errors to which fail-soft operation applies.
• NX Bus Communications Error
• Registered NX Unit Not Mounted
• NX Unit Communications Timeout
• NX Unit Initialization Error
NX-series Communication Control Unit Built-in Function User's Manual (Z396)
Operation when an error occurs while
starting
The NX Bus Function Module starts I/O
refreshing for the NX Units that can oper-
ate normally.
It does not start I/O refreshing for NX
Units that cannot operate normally.
The NX Bus Function Module does not
start I/O refreshing for any of the NX
Units.
3 Management Functions for NX Units
Operation when an error occurs dur-
ing normal operation
The NX Bus Function Module continues
I/O refreshing for the NX Units that can
operate normally.
It stops I/O refreshing for NX Units that
cannot operate normally.
The NX Bus Function Module stops I/O
refreshing for any of the NX Units.
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