Block1
Block4
Block3
Block2
However, if there is a Return instruction in the middle of a program and the execution condition is met,
the POU is ended and a return is made to the source of the call. No processes after Return instruction
are executed.
Execution Control
Safety programs that are written in the FBD language are generally executed from top to bottom, but
you can use the Jump instruction to change the execution order.
For example, when the value of variable
a
changes to TRUE in the following example, execution will
move to the network labeled "Exception".
You cannot jump to a network that is above the current network.
a
Exception
Exception:
FB1
FB2
Execution jumps
here
6 Programming
6 - 23
NX-series Safety Control Unit User's Manual (Z930)
6-4
Programming Languages
6
6-4-2
FBD Language
Summary of Contents for NX-SIH400
Page 4: ...Introduction 2 NX series Safety Control Unit User s Manual Z930 ...
Page 46: ...Revision History 44 NX series Safety Control Unit User s Manual Z930 ...
Page 108: ...2 Specifications 2 42 NX series Safety Control Unit User s Manual Z930 ...
Page 132: ...3 Installation and Wiring 3 24 NX series Safety Control Unit User s Manual Z930 ...
Page 148: ...4 Safety Control Unit Operation 4 16 NX series Safety Control Unit User s Manual Z930 ...
Page 216: ...5 System Configuration and Setup 5 44 NX series Safety Control Unit User s Manual Z930 ...
Page 306: ...6 Programming 6 90 NX series Safety Control Unit User s Manual Z930 ...
Page 390: ...8 Calculating Safety Reaction Times 8 12 NX series Safety Control Unit User s Manual Z930 ...
Page 412: ...11 Safety Data Logging 11 10 NX series Safety Control Unit User s Manual Z930 ...
Page 504: ...12 Troubleshooting 12 92 NX series Safety Control Unit User s Manual Z930 ...
Page 554: ...l I O Map Settings Appendices A 42 NX series Safety Control Unit User s Manual Z930 ...
Page 623: ...I Index I 1 NX series Safety Control Unit User s Manual Z930 I ...
Page 625: ......