Application; Details On Fail-Soft Operation - Omron PROFINET NX-PNC202 User Manual

11 PROFINET Coupler Unit Functions

11-7-2 Application

You can use this function in the following cases.
• When it is dangerous to stop the entire Profinet IO Device Terminal all at once
• To continue the operation of the Profinet IO Device Terminal until the system can be stopped safely
through the user program or user operation
• To not stop all devices, i.e., to continue operation for only some devices

11-7-3 Details on Fail-soft Operation

This section describes fail-soft operation in detail.
Operation for Errors with and without Fail-soft Operation
The following table describes the operation of a Profinet IO Device Terminal when the Profinet IO
Device Terminal is used with and without fail-soft operation.
Operating status
With fail-soft operation
Without fail-soft oper-
*1
ation
*1. When fail-soft operation is not used, all IO refreshing is stopped.
Except for the IO refreshing, the operation when an error occurs for the Profinet IO Device Terminal is
the same regardless of whether fail-soft operation is used. Specifically, error notification is provided and
errors are recorded in the event log. Also, the indicators will show the error.
Setting Fail-soft Operation
 Using Fail-soft Operation
To enable fail-soft operation, use the Sysmac Studio to set the Fail-soft Operation Setting in the Unit
operation settings for the PROFINET Coupler Unit to Fail-soft operation. After you change the set-
ting, always transfer the Unit operation settings to the PROFINET Coupler Unit. For the Unit opera-
tion settings of the PROFINET Coupler Unit and editing procedures, refer to 9-2-3 Unit Operation
Settings on page 9-10. Refer to 9-3 Transferring and Comparing Settings on page 9-16 for the pro-
cedure to transfer the settings.
 Not Using Fail-soft Operation
To disable fail-soft operation, use the Sysmac Studio to set the Fail-soft Operation Setting in the Unit
operation settings for the PROFINET Coupler Unit to Stop. The default setting is Stop.
After you change the setting, always transfer the Unit operation settings to the PROFINET Coupler
Unit. For the Unit operation settings of the PROFINET Coupler Unit and editing procedures, refer to
9-2-3 Unit Operation Settings on page 9-10. Refer to 9-3 Transferring and Comparing Settings on
page 9-16 for the procedure to transfer the settings.
11 - 28
Operation when an error occurs while
starting the Profinet IO Device Termi-
nal
The PROFINET Coupler Unit starts IO
refreshing for the NX Units that can
operate normally.
It does not start IO refreshing for NX
Units that cannot operate normally.
The PROFINET Coupler Unit does not
start IO refreshing for any of the NX
Units.
Operation when an error occurs
during normal operation of the Prof-
inet IO Device Terminal
The PROFINET Coupler Unit continues
IO refreshing for the NX Units that can
operate normally.
It stops IO refreshing for NX Units that
cannot operate normally.
The PROFINET Coupler Unit stops IO
refreshing for all of the NX Units.
NX-series PROFINET Coupler Unit User's Manual (W623)