![background image](http://html1.mh-extra.com/html/omron/ne1a-scpu01-07-2009/ne1a-scpu01-07-2009_operation-manual_742749107.webp)
72
Safety Master Function
Section 4-4
EPI (Data Expected Packet Interval) Setting
Set the interval to communicate safety data between the NE1A-series Safety
Master and Safety Slaves. Devices that transmit data to network are moni-
tored to confirm they can transmit the data within the set time interval and
devices that receive data are monitored to confirm they can receive normal
data within the data transmission interval using timers. If the data is not
received, the connection is disconnected and a switch is made to the safety
state.
Note
•
The time set here affects the network reaction time.
Refer to
Section 9 Remote I/O Communications Performance and Local I/O
Response Time
and to
Section 3 Constructing a Safety Network
in the
DeviceNet
Safety System Configuration Manual
(Cat. No. Z905) for information
on the net-
work reaction time.
•
The minimum set for the EPI is either the cycle time of the Safety Network Con-
troller or the cycle time of the Safety Slaves (always 6 ms), whichever is greater.
The minimum setting for the EPI will therefore be affected if the cycle time of the
Safety Network Controller is longer then 6 ms.
4-4-4
Stopping/Resetting Communications after an Error
With Controllers with unit version 1.0 or later, the user can specify whether to
stop or continue I/O communications after the connection times out during
safety I/O communications with the safety slave. If I/O communications are
stopped because of a timeout error, the communications can be restarted
from the logic program or a Programming Device.
With Pre-Ver. 1.0 Controllers, I/O communications are continued (automatic
recovery).
Setting the Operating Mode after a Communications Error
One of the following modes can be selected to specify the Controller’s opera-
tion when there is a connection timeout during safety I/O communications with
the safety slave.
Mode after
communications error
Description
Automatic recovery
Specify this mode to re-establish the safety I/O connection for a connection in which a
safety I/O communications error has occurred.
If the cause of the communications error is eliminated, safety I/O communications will
restart automatically.
Stop only the connection
where the error occurred.
Specify this mode to keep safety I/O communications stopped on a connection in which a
safety I/O communications error has occurred. I/O communications will continue for nor-
mal connections.
To restart safety I/O communications for connections in which I/O communications have
been stopped, use the Network Configurator to send a command to restart communica-
tions. It is also possible to write a logic routine in the logic program in advance to turn ON
the specified Safety I/O Communications Restart Flag and restart communications with a
specified trigger bit.
Stop all connections
Specify this mode to stop safety I/O communications with all safety slaves stopped after
a safety I/O communications error has occurred.
To restart safety I/O communications with the safety slaves after I/O communications
have been stopped, use the Network Configurator to send a command to restart commu-
nications. It is also possible to write a logic routine in the logic program in advance to turn
ON all of the Safety I/O Communications Restart Flags and restart communications with
a specified trigger bit.
Summary of Contents for NE1A-SCPU01 - 07-2009
Page 3: ...iv...
Page 9: ...x TABLE OF CONTENTS...
Page 11: ...xii...
Page 15: ...xvi...
Page 70: ...35 Installation Section 3 1 Top Top Bottom Bottom...
Page 72: ...37 Installation Section 3 1 3 1 3 Dimensions and Weight Dimensions NE1A SCPU01 V1...
Page 85: ...50 Wiring Section 3 2...
Page 123: ...88 Explicit Message Communications Section 4 7...
Page 141: ...106 Safety Outputs Section 5 4...
Page 257: ...222 Connection Status Tables Section 10 8...
Page 261: ...226 NE1A series Controller Replacement Section 11 2...
Page 264: ...229 Appendix A Local Input and Test Output Setting Example Local Output Setting Example...
Page 266: ...231 Appendix A Programming Example Local Input and Test Output Setting Example...
Page 267: ...232 Appendix A Local Output Setting Example...
Page 269: ...234 Appendix A Programming Example Local Input and Test Output Setting Example...
Page 270: ...235 Appendix A Local Output Setting Example...
Page 273: ...238 Appendix A Local Input and Test Output Setting Example Local Output Setting Example...
Page 275: ...240 Appendix A Programming Example Local Input and Test Output Setting Example...
Page 276: ...241 Appendix A Local Output Setting Example...
Page 289: ...254...
Page 293: ...258 Index...