Safety Relay User Manual Owner's manual

Rockwell Automation Publication 440C-UM001C-EN-P - November 2014 107
Troubleshooting Chapter 15
Tab l e 18 shows the 'fault bit' message for the type of functions that are selected
for the Safety Monitoring Function block.
Table 18 - Fault Messages for the SMF Type
Example Fault Analysis –
Crossfault
Create a crossfault from Input Test Pulse A to Input Pulse Test B with the safety
output ON.
• The Modbus address 000505 goes HI immediately, showing that the fault
was detected.
• About 4 seconds later, the fault is acted upon.
• Modbus address 000393 (Bit 0 of SMF1) goes HI.
• The Safety Output goes off.
• On the CCW Logic tab, the E-stop and gate inputs go off, and both logic
blocks show red color.
• The CCW Project tab shows “Recoverable Fault”.
Figure 126 - Mouse Over E-stop Block
SMF Type Fault Bit 3 Fault Bit 2 Fault Bit 1 Fault Bit 0
1 Channel Reserved Reserved Reserved Input circuit shorted to 24V.
2 Channel, Two
Hand Control
Reserved The left and right buttons have been
in an inconsistent state for longer
than 500 ms.
Reserved At least one circuit shorted to 24V or
another input circuit.
Safety Mat Reserved Discrepancy Fault: Input channels
inconsistent greater than the
configured discrepancy time
One channel went to the safe state
and back to the active state while the
other channel remained active, or
One channel went to the safe state
upon power up.
At least one circuit shorted to 24V or
another input circuit.
3 Channel Reserved Reserved One channel went to the safe state
upon power up.
At least one circuit shorted to 24V.
Reset Reserved Reserved Reserved A transition of the reset input from ON
(1) to OFF (0) did not occur within
3,000ms.
Override Reserved Reserved Reserved At least one circuit shorted to 24V or
another input circuit.
Restart Reserved Reserved Reserved A transition of the restart input from
ON (1) to OFF (0) did not occur within
3,000ms.
Mute Reserved Muting sensor sequence fault. The Light Curtain was muted for
longer than the configured maximum
mute time.
Too much time elapsed between
Sensors being blocked.
Lack of Muting
L-Type
Too much time elapsed between
Sensor2 and Light Curtain2 being
blocked.
Muting sensor sequence fault. The Light Curtain was muted for
longer than the configured maximum
mute time.
Too much time elapsed between
Sensor1 and Sensor2 being blocked.