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Safety Device Function Blocks Section 3-5
In addition, if the enable-switch device is the type that outputs a grip signal
and release signal, the device’s Grip Input and Release Input signal status
can be monitored. The received Grip Input and Release Input signals do not
affect the status of the Output Enable signal.
Startup All errors are turned OFF and all timers are reset at the start of operation. The
Output Enable signal will not turn ON if Input 1 is active for a signal-channel
input or if Input 1 and Input 2 are active for a dual-channel input. For the Out-
put Enable signal to turn ON, the Input 1 and Input 2 must be made inactive
and then made active again.
Set Parameters
The timer SV must be longer than the cycle time.
Number of I/O Points
Setting
The Grip Input and Release Input can be enabled and disabled on the In/Out
Setting Tab Page in the function block property dialog box.
Optional Output
Setting
The following outputs can also be used in programming. To enable any of
these optional outputs, select the corresponding check box on the Output
Point Tab Page of the function block properties dialog box.
• Grip Enable
• Release Enable
• Discrepancy Error
Fault Present Output
Setting
A Fault Present output can also be used in programming.
To enable this output, select the Fault Present check box on the Output Point
Tab Page of the function block properties dialog box.
Truth Tables
Single Channel Mode
Dual Channel Equivalent
Mode
Parameter Setting range Default setting
Input Type Single Channel
Dual Channel Equivalent
Dual Channel
Equivalent
Discrepancy Time 0 to 30 s in 10-ms increments
A discrepancy time check will not be performed if 0 is
set.
30 ms
Parameter Setting range Default setting
Number of inputs 2 to 4 (Optional Input Settings)
2: Grip and Release Inputs disabled.
3: Grip Input enabled.
4: Grip and Release Inputs enabled.
2
Input 1 (NO) Output Enable
OFF OFF
ON ON
Input 1 (NO) Input 2 (NO) Output Enable
OFF OFF OFF
OFF ON OFF
ON OFF OFF
ON ON ON
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