Enabling Ethernet Services

Introduction

Use the Services page to enable and disable Ethernet services provided by the 140NOC78000 head module.

NOTE: After you enable a service, you can configure its settings. If you do not configure a service, Control Expert applies its default settings.

The Services page looks like this, with all settings configured as Enabled:

NOTE: By default, the Access Control field is set to Disabled. All other fields are set to Enabled.

Enabling/Disabling Ethernet Services

To enable or disable Ethernet services on the Services page:

Step	Action
1	Double-click the 140NOC78000 head module in the DTM browser or right-click the module and click Open.
2	Click Services in the navigation tree located in the left panel of the Device Editor.
3	For each feature, change the setting as desired. Access Control and Network Time Service are Disabled by default. All other features are Enabled by default.
4	Click Apply to save changes, or click OK to save changes and close the window.

When you Enable a service, Control Expert displays a node for that service in the navigation tree in the left panel of the Device Editor, beneath the Services parent node. Click a service node to access its settings.

When you Disable a service, Control Expert hides the node for that service.

NOTE: Refer to Configuring Properties in the Device Editor for instructions on how to edit properties.

Ethernet Services Descriptions

The 140NOC78000 head module can be configured to provide the following Ethernet services:

If this service is enabled...	The module can...
Access Control	deny access to the 140NOC78000 head module by unauthorized network devices.
Address Server	provide both IP addressing parameters and operating parameters to other Ethernet devices.
I/O Communication Control	allow the Control Expert application to control the enabling and disabling of individual connections between the head module and remote I/O devices. NOTE: The application can open and close individual connections using the control bits located at the beginning of the output area. If this service is disabled, the user — via the application program — cannot toggle on and off connection control bits
Network Time Service	synchronize computer clocks over the Internet for the purposes of event recording (sequence events), event synchronization (trigger simultaneous events), or alarm and I/O synchronization (time stamp alarms).
Service Port	support 2 functions: Access Port: You can connect an Ethernet device (ex: an HMI or a PC with Control Expert software or a PC with ConneXium Network Manager software) to this port, and communicate with the CPU/PLC, the 140NOC78000 head module itself, or access other devices connected to the network. Port Mirroring: You can connect to this port via a PC and sniff (using Ethereal, WireShark, etc.) the traffic that is travelling through the other ports including the Ethernet port — the internal port — that is connected to the CPU.
SNMP	serve as an SNMP v1 agent. provide trap information to up to two devices configured as SNMP managers. NOTE: The SNMP service is always enabled.
QoS Tagging	add Differentiated Services Code Point (DSCP) tags to Ethernet packets so that network switches can prioritize the transmission and forwarding of Ethernet packets. NOTE: The DSCP service is always enabled.
RSTP	create a loop-free logical network path for Ethernet devices that are part of a topology that includes redundant physical paths. The RSTP-enabled module also automatically restores network communication – by activating redundant links – in the event the network experiences a loss of service. NOTE: The DSCP service is always enabled.