Dear Sir/Madam,

We are using the siemens perfect harmony 6.6kV INPUT/6.6kV OUTPUT, 850kW/1250kVA

Part no : A5E32855132, A5E32855658

Problem : We are facing the problem with Multi-Language Keypad was not showing the display. 

Points we checked : -

1. keypad cable, connections checked between the keypad and CPU.

2. CPU was working.

2. Cross checked the Watchdog was enabled.

Further what i need to check?

Please suggest me permanent counter measure to solve this issue.

Note : Drive was working normal.We are operating the drive through remote via profibus communication.

Regards,

Sivaji Manigandan

Hi Sivaji

Issue might be with Keyboard adapter board or display itself. Can you check this adapter board is intact on the slot. How u checked the cable, pin to pin continuity you have to check for the flat cable.

Regards,

VIjay

Hello Sivaji.

From my experience regarding the keypad, the possibility of this failure might be ribbon cable between the keypad & keypad interface board. disassemble the plug socket to check any cable line broken.

In my case, last red line was cut off, result of it, key pad was not working properly.

^^ I hope it will helpful for you.

we have same problem , i also check cable between display and card .but still display black .

Could you help me about this problem ?

i want to indicate this situation: 

aproximatly 1 month the  screen was black .but today screen is opened. i turn off control power and then turn on but it chenged black . 

HI

Check pin to pin continuity of the cable. If ok, then with antistatic wrist band remove adapter board from DCR and check all ICs are intact.

Vijay

N. Vijay

HI

Check pin to pin continuity of the cable. If ok, then with antistatic wrist band remove adapter board from DCR and check all ICs are intact.

Vijay