GE Grid Solutions MDS Master Station, Техническое руководство

Страница: 51 / 137

MDS 05-6399A01, Rev. F
MDS™ Master Station
47
- None – This is the default value, and is used when the Master Station being
configured is not to be used as a repeater in the network.
- Repeater – This value should be selected when the Master Station being
configured is to be installed as a repeater in the network, and will not have
devices connected to it that will be polled, such as attached RTUs.
- Repeater With Local Data – This is the same as “Repeater” but should be used
when data-collection devices such as serial RTUs will be attached directly to the
repeating Master Station.
•
Allowed Ethernet Packet Types – When operating in packet-with-mac mode, and
sending Ethernet traffic, this option will restrict the types of Ethernet frames that will be
sent over the air. Options are:
- None – This will prevent any Ethernet frames from being transmitted over the air.
- All – All Ethernet frames will be sent over the air, regardless of type.
- Unicast Only – Only unicast packets will be sent over the air.
- Unicast and ARP – This is the default value and will only allow unicast frames,
or broadcast ARPs to be transmitted over the air.
•
Serial Payload Port – The front-panel serial port that will be used for serial payload
communications. This can be set to COM1, COM2, or disabled if the system will not be
used for transmitting serial data. The default value for this is COM1.
Serial port settings such as baud rate and byte format are located under
Services

Serial

Ports
.
•
Payload Buffer – The transceiver’s buffer provides a way of handling data 'over-runs',
where more data is passing through the COM port than can be immediately handled by the
unit. When the payload-buffer is on, any such data is stored up and processed in the
appropriate order.
•
Payload Serial Talk VRC / Payload Serial Talk 2 VRC – Serial data received on the
primary/secondary serial payload port will be tagged with this VRC and sent over-the-air.
•
Payload Serial Listen VRC / Payload Serial Listen 2 VRC – Over-the-air payload
traffic that is tagged with this VRC that the Master Station receives will be transmitted out
of the primary payload serial port.
•
Encryption – When the Master Station is being used in a network of only SD radios,
over-the-air (OTA) encryption may be enabled. The Master Station uses AES-128,
passphrase-based encryption to secure both payload, and Dlink traffic. If the radio is
operating in transparent mode, there is a separate passphrase for payload and Dlink traffic.
If the radio is operating in packet or packet-with-MAC mode, there is a singular
passphrase for all traffic.
•
Payload Encryption Phrase – The encryption phrase to be used for over-the-air payload
data. This string must be at least 8 characters, and no greater than 38 characters.