Hier die Antwort. Es liegt bestimmt an der Konfiguration bzw. Einstellung des Druckers. Die Lösung mit SNMP ist sowieso die Beste !

If CPD338D is received with return code 3426 (RC3426), it could indicate that the print server or network interface card (NIC) is not set up for bi-directional communications. Verify that the parallel mode is set to BiTronics, Bi-Directional, or ECP/MLC, rather than Centronics.

Receiving message CPD338D with return code 3426 (RC3426) could also indicate that the printer or print server does not support PJL. In many cases, the printer or print server may not support PJL but does support SNMP, in which case changing the *LAN 3812 PJL device description to be a *LAN 3812 SNMP device description may resolve the problem. This can typically be done by setting the User-defined options (USRDFNOPT) parameter to *IBMSHRCNN and changing the System driver program (SYSDRVPGM) parameter from *HPPJLDRV to *IBMSNMPDRV.

For more information, please refer to the following document:

N1019572: Configuring a *LAN 3812 SNMP Device Description