Omron DeviceNet Safety, System Configuration Manual

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Extend Mode Settings Section 5-7
5-7-2 Setting the Program Execution Delay
Note When the Program Execution Delay is disabled, the Slave input signals will
not be updated in the program until communications begins. (Input values will
be 0.)Because of this, errors will occur in programs that use a Slave input as
the feedback signal to the EDM, or as the input to a function block with dual
channel equivalent inputs. If this happens, enable the Program Execution
Delay.
Program Execution Delay Description
Disable (Execute the pro-
gram without waiting for the
Safety I/O.) The program will be executed without waiting for communications to begin. The Slave input
signals will not be updated in the program until communications begins. (Input values will be
0.) Program operation results will not be output to the Slaves.
Enable (Execute the pro-
gram after waiting for the
Safety I/O.) Executes the program after waiting for all safety I/O communications to begin. Program exe-
cution is delayed in comparison to when Disable is selected.If communications never begins,
the program will be executed but the Slave input signals will not be updated in the program.
(Input values will be 0.)