Hello Siemens Family,

im trying to communicate with production line printer Jet3 UP via TCP/IP Ethernet protocole using Siemens PLC s7-1200. We have done succesfull communication using Hercules PC software. Printer responded properly. 

In TIA Portal v17 im using TCOM, T_SEND and T_RCV funtions. 

Also tried (LOpenUserComm_Tcp function block) and T_SEND_C/ T_RCV_C.

It seems communication has been established (Devices $ Network -> Connections).

Im converting string to array of char using STRG_TO_CHARS function.

Here are functions mentioned above:

Im sending exact same characters used in Hercules software but printer doesnt respond. 

Im have tried many compinations sending different string or chars to the printer but none works. 

Please help me understand what may cause this issue. Im including interface protocol and screens of data blocks.

Best regards 

Hello, I have the same problem with the same marker model, were you able to solve it and how?

Thank you for the support.