Hi,
Resetting the RM04 module caused the evil.
Now the DR5000 and the module disagree about which protocol is to be used. ( because of the factory reset )
Fix:
1. Set the Protocol to TCP/IP Binary,
2. save,
3. reboot the DR5000 ( power off power on )
4. Set the Protocol to Z21
5. save
6. reboot the DR5000 ( power off power on )?
All should be well right now.
Greets,
Karst