Publication 1752-UM001A-EN-P - October 2006
168 Function Blocks Command Reference
If enabled, the safety gate test must be executed under the following
conditions:
• Startup – The safety gate test must be executed when the
controller is started, that is, when the operating mode changes
from Idle to Run. If the test ends normally, the Output Enable
signal turns on.
• Function Test Request From the Machine – The safety gate test
must be executed after the controller detects the Function Test
Signal from the machine, turns on, and before the Function Test
Signal turns on again. If the Function Test Signal turns on a
second time before the safety gate test is completed normally, a
function test error occurs, the Output Enable signal turns off,
and the Function Test Error Signal turns on.
• Error Detected in Safety Gate Monitoring Function Block – If a
function test error, a discrepancy error, or other function block
error occurs, the safety gate test must be executed after the
cause of the error is removed.
The Function Test Required Signal from the Safety Gate Monitoring
function block turns on when a safety gate test is required. It remains
on until the safety gate test has been completed normally.
Safety Gate Monitoring Function Block Parameters
Set these parameters for the Safety Gate Monitoring function block.
Safety Gate Monitoring Function Block Parameters
Parameters Range Default
Input Type Single Channel
Dual Channel Equivalent (1 pair)
Dual Channel Complementary (1 pair)
Two Dual Channel Equivalent (2 pairs)
Two Dual Channel Complementary (2 pairs)
Dual Channel
Equivalent
Function Test No Function Test/Function Test Required No Function Test
Discrepancy Time
Pair 1
0
…30 s in 10 ms increments
A discrepancy time check is not performed if 0
is set.
30 ms
Discrepancy Time
Pair 2
Synchronization
Time
0
…30 s in 10 ms increments
A synchronization time check is not performed
if 0 is set.
300 ms
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