Rockwell Automation Publication 5069-UM004A-EN-P - April 2019 141
Safety Module Features Chapter 5
Muting Lamp Operation
Your controller program controls test outputs 2…3 to illuminate a muting
lamp. Muting lamp status is monitored with a test that runs periodically during
every test interval to detect a burned-out lamp. The test runs repeatedly when
the test output is commanded On or commanded Off and a fault is detected.
Figure 17 shows how muting lamp operation, status, and fault detection are
monitored.
Figure 17 - Muting Lamp Timing Diagram
TIP The lamp test interval is 3 seconds. Two consecutive failed lamp tests are
required to declare a burned-out lamp condition.
The lamp test does not always run immediately after the test output is
energized. It starts at the next 3-second interval. To allow time for two
consecutive test intervals, program a minimum Test Output On Time of 6
seconds.
Bulb Connected/Good
Bulb Disconnected/Burnt out
On
Off
Connected
Muting Lamp
Connected
Disconnected
Disconnected
Active
Lamp Test
Inactive
Test Time
Test Interval
Good
Muting Status
Burn-out
TO3 Output
On
Off
1
2
3
4
1 - Burnt-out lamp detected
2 - Good lamp detected
3 - Intermittent lamp testing stopped
4 - Intermittent lamp testing started
To Next Page
Loading...
Need help?
General
