So, folgendes habe ich nun getan:
1. Ersten Aktor auf Werkseinstellungen zurückgesetzt.
2. fhem.cfg folgendermaßen bearbeitet:
attr global userattr cmdIcon devStateIcon:textField-long devStateStyle icon sortby webCmd webCmdLabel:textField-long widgetOverride
attr global autoload_undefined_devices 1
attr global logfile ./log/fhem-%Y-%m.log
attr global modpath .
attr global statefile ./log/fhem.save
attr global verbose 3
define WEB FHEMWEB 8083 global
setuuid WEB 6594414e-f33f-625e-7689-8f1d45aece6d760f
attr WEB editConfig 1
# Fake FileLog entry, to access the fhem log from FHEMWEB
define Logfile FileLog ./log/fhem-%Y-%m.log Logfile
setuuid Logfile 6594414e-f33f-625e-289a-7b9ea791f8be42e0
define autocreate autocreate
setuuid autocreate 6594414e-f33f-625e-5937-3d7d1ac670007436
attr autocreate autosave 1
attr autocreate filelog ./log/%NAME-%Y.log
define eventTypes eventTypes ./log/eventTypes.txt
setuuid eventTypes 6594414e-f33f-625e-6335-847f834109dd0a46
# Disable this to avoid looking for new USB devices on startup
#define initialUsbCheck notify global:INITIALIZED usb create
#setuuid initialUsbCheck 6594414e-f33f-625e-f812-a65bc856b47afd3a
#### nanoCUL ######
define nanoCUL CUL /dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A94NJP1H-if00-port0@38400 0000
setuuid nanoCUL 65945d71-f33f-625e-2eae-f6e9e237fedab989
attr nanoCUL hmId 329266
attr nanoCUL rfmode HomeMatic
##### VCCU #######
define VCCU CUL_HM 329266
attr VCCU model CCU-FHEM
attr VCCU IOList nanoCUL
attr VCCU IOgrp VCCU
3. set VCCU hmPairForSec 600
4. Aktor wurde erkannt und folgendermaßen in der fhem.cfg aufgeführt:
[code]
attr global userattr cmdIcon devStateIcon:textField-long devStateStyle icon sortby webCmd webCmdLabel:textField-long widgetOverride
attr global autoload_undefined_devices 1
attr global logfile ./log/fhem-%Y-%m.log
attr global modpath .
attr global statefile ./log/fhem.save
attr global verbose 3
define WEB FHEMWEB 8083 global
setuuid WEB 6594414e-f33f-625e-7689-8f1d45aece6d760f
attr WEB editConfig 1
# Fake FileLog entry,...Aw: Homematic Actor HM-LC-BL1PBU-FM Missing Ack