Omron NE1A Series Manual page 134

Command Reference: Function Blocks
General Description
IMPORTANT A manual reset function is required for emergency stop applications. When
Set Parameters
Optional Output Setting
Fault Present Output Setting
The Emergency Stop Pushbutton Monitoring function block allows the user to
monitor an emergency stop pushbutton switch.
The Output Enable signal will turn ON if the input from the emergency push-
button being monitored is active. The Output Enable signal will turn OFF if the
input is inactive or if an error is detected for the function block.
using the Emergency Stop Pushbutton Monitoring function block, you must
also use the Reset function block.
Refer to A-1-1 Emergency Stop Application: Dual Channel Mode with Manual
Reset for a Programming Examples.
Parameter
Input Type Single Channel
Dual Channel Equivalent
Dual Channel Complementary
Discrepancy Time 0 to 30 s in 10-ms increments
A discrepancy time check will not be performed
if 0 is set.
The discrepancy time must be equal to or greater than the NE1A-series Con-
troller's cycle time.
The following error output can also be used in programming. To enable this
optional output, select the checkbox on the Out Point Tab Page of the function
block properties dialog box.
• Discrepancy Error
A Fault Present output can also be used in programming.
To enable this output, select the Fault Present checkbox on the Out Point Tab
Page of the function block properties dialog box.
Maximum Number of I/O for a Emergency Stop Pushbutton Monitoring Func-
tion Block
Setting range
Section 6-5
Default setting
Dual Channel
Equivalent
30 ms
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