Not able to Detect EtherCAT Chassis NI 9145 more than 4nos on PXI controller 8108

[Atul_4uni]

Not able to Detect EtherCAT Chassis NI 9145 more than 4nos on PXI controller 8108.

I have total 5nos. of NI 9145 EtherCAT chassis which i am trying to detect in VeriStand (2017). 

I am able to detect 4nos. NI 9145 chassis but 5th position is not detected, I tried Auto detect module as well manual FPGA and Scan mode but no successes.

All chassis connected in Daisy chain connection to PXI controller 8108.

Current Hardware Setup as follows,

1.Host PC Windows
2.PXI chassis 1042q
3.PXI controller 8108
4.NI EtherCAT chassis Total 5nos. (4nos. Getting listed in VeriStand, but 5th no. position chassis not getting detected.)

Please let me know if there is any hardware restriction\setting is blocking detection on 5th position chassis.

Any further details required please let me know Thanks in Advance.

Troubleshooting Steps already tried,

1. Change of Network cable to 5th position chassis.

2. Interchanging chassis position but every time only 5th position chassis is not getting detected.