Siemens SINUMERIK Commissioning Manual page 172

Diagnostics and service
5.7 HMI Analyzer
(2) No connection to the NCU/PLC
Problem:
In spite of adaptation to the NCU/PLC address in the mmc.ini file, no connection to the
NCU/PLC can be established.
Possible cause:
Due to the hierarchical execution of the HMI directory, the entry made in the mmc.ini file was
overwritten by an entry with a higher priority and is therefore not in effect.
For example, an entry was made in the OEM directory:
[NCU840D]
ADDRESS0=5,NAME=/NC,SAP=d
ADDRESS1=6,NAME=/PLC,SAP=1
This is then overwritten in the user directory:
[NCU840D]
ADDRESS0=14,NAME=/NC,SAP=d
ADDRESS1=14,NAME=/PLC,MAX_BUB_CYCLICS=0
Figure 5-12
HMI Analyzer:
Under Files → HMI, the mmc.ini is selected. The resulting mmc.ini file from all the HMI
directories is now displayed (mmc2, hmi_adv, add_on, oem, user). Now it becomes clear
whether the entry that was made is also truly active or was overwritten by another entry. In
addition, it is possible to recognize which HMI directory the entry comes from.
166
Checking the connection to the control
Commissioning Manual, 03/2009, 6FC5397-0DP10-3BA0
HMI Advanced (IM4)