WESDAC D20 C控制處理器,GE通用電氣支持UCMM的組2服務(wù)器? 每個(gè)從機(jī)一個(gè)或兩個(gè)輸入/輸出連接-通常一個(gè)連接是用于輪詢，另一個(gè)用于選通、循環(huán)或COS? 支持帶有一個(gè)代理的未連接消息管理器（UCMM）每個(gè)從設(shè)備的連接? 可配置的全局掃描速率? 支持輪詢、選通、循環(huán)和COS輸入/輸出連接，分段輸入/輸出和顯式消息傳遞? 連接上輪詢和COS/Cyclic的可配置更新速率原因? 對(duì)通信中斷的可配置響應(yīng)? 通過(guò)模塊上的服務(wù)端口更新固件模塊的三個(gè)DeviceNet兼容LED顯示其操作和通信狀態(tài)。
WESDAC D20 C控制處理器RS-232串行端口用于固件升級(jí)期間的計(jì)算機(jī)連接。這個(gè)DeviceNet連接器是一個(gè)可拆卸的彈簧夾端子。它提供總線連續(xù)性和can在不中斷總線操作的情況下，從模塊中卸下。設(shè)備可以直接連接到中繼電纜，也可以連接到連接到中繼的支線帶分接頭的電纜。分接頭可以安裝在接線盒或面板中。下降線和菊花鏈通常在多個(gè)設(shè)備組合在一起的控制面板內(nèi)使用。使用時(shí)帶有菊花鏈和樹(shù)枝的水滴，從水龍頭到其最遠(yuǎn)水滴的最大長(zhǎng)度為20腳?？偩€長(zhǎng)度中繼電纜和中繼線的最大長(zhǎng)度取決于電纜類型和數(shù)據(jù)速率。單個(gè)落差不得超過(guò)6米，并且每個(gè)落差僅限于一個(gè)網(wǎng)絡(luò)節(jié)點(diǎn)。然而，節(jié)點(diǎn)可能有多個(gè)端口。對(duì)于每個(gè)波特率，總下降長(zhǎng)度是中兩種電纜類型的所有下降線的總和網(wǎng)絡(luò)。此外，如果從分接頭到其下降點(diǎn)上最遠(yuǎn)設(shè)備的距離大于從抽頭到最近端接電阻器的距離，下降線長(zhǎng)度也算作一部分中繼電纜長(zhǎng)度（以及總落差長(zhǎng)度）
UCMM-capable Group 2 Server
? One or two I/O connections per Slave - Typically one connection is
used for Polled and the other is used for Strobe, Cyclic, or COS
? Supports Unconnected Message Manager (UCMM) with one proxy
connection per slave device
? Configurable global scan rate
? Supports Poll, Strobe, Cyclic and COS I/O connections, Fragmented
I/O and Explicit Messaging
? Configurable update rates for Poll and COS/Cyclic on a connection
basis.
? Configurable response to loss of communication
? Firmware update via service port on moduleThe module's three DeviceNet-compliant LEDS show its operating and communications status.
The RS-232 serial port is used for a computer connection during firmware upgrades. The
DeviceNet connector is a removable spring-clamp terminal. It provides bus continuity and can
be removed from the module without disrupting bus operation.Devices can be connected directly to the trunk cable, or to drop lines that are joined to the trunk
cable with taps. Taps can be mounted in junction boxes or panels. Drop lines and daisy-chains
are often used inside control panels where multiple devices are grouped together. When using
drops with daisy-chains and branches, the maximum length from a tap to its farthest drop is 20
feet.Bus Length
The maximum length of the trunk cable and drops both depend on the cable type and data rate.
Individual drops may not exceed 6 meters and are limited to one network node per drop.
However, the node may have multiple ports.For each baud rate, the total drop length is the sum of all the drop lines of both cable types in
the network.
In addition, if the distance from a tap to the most distant device on its drop is longer than the
distance from the tap to the nearest terminating resistor, the drop line length also counts as part
of the trunk cable length (as well as the overall drop length)
