No connection to the OP!

Hi.
Panel OP37 not working, see fault after to transfer mode:


"""""Establishing the serial connection at COM 1 with 9600 baud...
"""""E4020: Internal Error Download 00003621H.
"""""No connection to the OP!

used cable :

connection cable Structure :
1-
OP plug          : PC plug:
15-pin male 9-pin female
pin 1 shield ------ ----
pin 3 RxD ------ pin 3 TxD
pin 4 TxD ------ pin 2 RxD
pin 2 Gnd ------ pin 5 Gnd

pin5 -------------pin7

pin6 -------------pin8

15-pin male 9-pin female
pin 3 ------ pin 3 TxD
pin 4 ------ pin 2 RxD
pin 5 ------ pin 7Gnd
pin 10------ pin 8 Gnd

I use of protool sp3 / windows xp sp3.
What should I do?

Hy Mohammedrezaee.

Have you check if you are using the right connection cable:

https://support.industry.siemens.com/cs/ww/en/view/19109408

Maybe you need to reset your panel or maybe it has a defect, or the battery is empty, please refer to the manual:

https://support.industry.siemens.com/cs/ww/en/view/1142800

Hello mohammedrezaee,

Have a look also this thread especially Navnag pdf:

Connection cable for downloading to OP37 from PC ... - Siemens