Problem:
Interlock is on but the HMI reason screen is not popup.
Reasons: There are two reasons,
A) HMI is disconnected.
B) DATCon is disconnected.
Issue analysis: There are two steps to check the issue,
Step 1- If the issue is still there-
Ping the IP of HMI and DATCon on cmd prompt
ping <IP address> -t
Example - ping 192.168.1.170 -t and press the enter button.
Step 2- If the issue has come and gone.
Check the historical data of the below variables when the issue came up,
A) Machine Interlock PLC
B) Machine Interlock HMI
Value of both variables are same then escalate this issue to Implementation Engineer
If the value of Machine Interlock HMI is blank in historical data it means that HMI was off or out of the network during this period.