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6.11 HMI PC Security Considerations
In general, we provide out-of-box application and install application to single computer so it's
not necessary and not allowed to modify application yourself. Please contact Honeywell service
team before any firmware/software updates.
In order to protect your data please lock HMI Rack to forbidden touching USB port without
permission , keep the key properly.
6.11.1 Connectivity
The VC4™ HMI PC has two one-gigabit ethernet ports, one for connecting to the internal
analyzer network, and one for connecting to an external network. The VC4™ HMI PC has no
wireless connectivity.
6.11.2 Internal Network
The internal analyzer network is 192.168.254.0/24, and the HMI PC has the address
192.168.254.1 on this network. Only connect analyzers and the HMI PC to this internal network.
Do not connect any other device.
6.11.3 External Network
The connection to the external network is not required but enables additional features,
including remote web access and the Modbus TCP server. These services are enabled by default
but can be disabled via the General > Network configuration page. The default configuration of
the VC4™ HMI PC external network connection is via DHCP. However, if desired, a static
configuration is possible via the General > Network configuration page. Care should be taken
both in DHCP server configuration as well as in the static configuration that the network
assigned to the external connection, and that does not overlap with the internal analyzer
network.
6.11.4 VC4™ HMI External Network Services
Service
HTTP
HTTPS
Modbus TCP
Note: Chrome browser of 93.0.xx or later version is strongly recommended to access to the HMI
remotely.
Note: When the web interface is enabled/used, the encrypted interface on port 443 is strongly
recommended since HTTP web service is not secure.
VC4™
Port
Transport Protocol
80
TCP
443
TCP
502
TCP
129
Default Setting
OFF
OFF
OFF
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