Hello every one.

i have 1. CU250S-2 PN VER. 04-V4.60

2. CU240E- 2PN VER. B01-4.70

3. CU240E-2 PN FW 4.7 SP13 HF4 (purchased just new one)

2 is communicating with laptop via Sinamic starter v 5.5 hf1 with the help of ethernet port and usb cable both (it is for reference to confirm ports and cable)

but no. 1 and no.3 are not connecting with ethernet port.

but both are working only via USB cable for up loading and downloading program.

both LED's are glowing in the start of drive but after a few seconds both are not indicating the connection of cable.

anyone can guid me what can it cause. and what is its remedy.

Muhammad Danish

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Split from PN/PN Coupler Projection fault.

thank you for replying 

but i have said that i am connecting my CUs stand alone with my pc only for parameterise but 1 of them is communicating and showing the connection with the leds of link1 and other two are not showing any connection with pc my pc Ethernet shows unplugged