Rockwell Automation Publication 856T-UM001B-EN-P - April 2021 37
Chapter 4 IO-Link Parameters
Observation Tab
This tab indicates each circuit status on the stack light, shows alarm status,
and provides a view of the measurement values.
All data that is displayed on this tab is read-only (ro).
The Observation tab contains the following device information:
Table 5 - Observation Tab
Parameter Description Value
Stack Light Status (Circuit s 1…7)
. Module Indicates if a module selected in the parameter tab is using this circuit
No Module
Module 1…7
. Status Denotes ON/OFF condition for this circuit
ON= Circuit is turned ON
OFF= Circuit is turned OFF
. Short Circuit
Indicates if a short circuit condition is present in this circuit. For more details on how the short
circuit detection works please see Short Circuit
on page 70.
TRUE=Short circuit detected
FALSE =No short circuit exists
. Open Circuit
Indicates if the stack light module is making electrical connection with this circuit when a
command to turn On the circuit is sent.
TRUE= Open circuit condition exists
FALSE= No open Circuit detected.
. Cycle Counter Indicates the number of times a circuit has transitioned from OFF to ON state. 0…4,294,967,296
. Cycle Counter - Life Time
Indicates the number of times a circuit in the IO-link module has transitioned from OFF to ON
state since inception.
0…4,294,967,296
Alarm Status
. Class-A Over Voltage Indicates if the voltage is above 30V DC
TRUE= Event triggering alarm occurred
FALSE= Event did not occur
. Class-A Under Voltage Indicates if the supply voltage is below 18V DC
TRUE= Event triggering alarm occurred
FALSE= Event did not occur
. Class-B Over Voltage Indicates if the auxiliary supply voltage is above 30V DC
TRUE= Event triggering alarm occurred
FALSE= Event did not occur
. Class-B Under Voltage Indicates if the auxiliary supply voltage is below 18V DC
TRUE= Event triggering alarm occurred
FALSE= Event did not occur
. Device Over Temperature Displays if the internal temperature in the IO-Link module is above the specified upper limit
TRUE= Event triggering alarm occurred
FALSE= Event did not occur
. Device Under Temperature Displays if the internal temperature in the IO-Link module is below the specified lower limit
TRUE= Event triggering alarm occurred
FALSE= Event did not occur
. Excessive Vibration
Indicates if the vibration detected by the IO-Link module is above certain threshold on any of the
X, Y, or Z motion axis
TRUE= Event triggering alarm occurred
FALSE= Event did not occur
. Short Circuit Indicates that a short circuit condition on any of the stack light or sound modules exist
TRUE= Event triggering alarm occurred
FALSE= Event did not occur
. Open Circuit
Flags an open load condition in specific circuits due to an improper assembly of light modules in
the stack light
TRUE= Event triggering alarm occurred
FALSE= Event did not occur
. Power on Self-Test Failure
Indicates if a fault either recoverable or unrecoverable has been detected during the IO-Link
module self-test
TRUE= Event triggering alarm occurred
FALSE= Event did not occur
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