UAD149A00-0-11控制卡件，ABB使用指導(dǎo)
串行端口3傳輸時(shí)鐘配置（J18）在使用MVME761轉(zhuǎn)換的同步串行通信中模塊，您可以配置MVME2603/2604上的串行端口3以使用TxC信號(hào)線提供的時(shí)鐘信號(hào)。在MVME761上-兼容版本的基板、收割臺(tái)J18將端口3配置為驅(qū)動(dòng)或接收TxC。出廠配置將端口3設(shè)置為接收TxC。
UAD149A00-0-11控制卡件J18在MVME712M兼容版本上保持打開狀態(tài)。要完成串行端口3的配置，必須在MVME761轉(zhuǎn)換模塊（串行端口3時(shí)鐘配置）。圖1-7和圖1-8（適用于MVME712M）以及圖1-14和圖1-15（對(duì)于MVME761）顯示了整體跳線設(shè)置串行端口的MVME2603/2604和轉(zhuǎn)換模塊上需要3 DCE或DTE配置。系統(tǒng)控制器選擇（J22）MVME2603/2604在工廠配置為VMEbus系統(tǒng)控制器通過跳線頭J22。如果您選擇“自動(dòng)”系統(tǒng)控制器通過在J22引腳2和3上放置跳線來實(shí)現(xiàn)功能MVME2603/2604通過其在總線上的位置。如果電路板位于左側(cè)的第一個(gè)插槽中，則將自身配置為系統(tǒng)控制器。如果MVME2603/2604不作為系統(tǒng)控制器，在任何情況下，將跳線放在J22上針腳1和2。當(dāng)電路板作為系統(tǒng)控制器工作時(shí)，SCONLED亮起。遠(yuǎn)程狀態(tài)和控制MVME2603/2604前面板LED和開關(guān)安裝在可拆卸夾層板。卸下LED夾層使夾層連接器（J1，鍵控雙排14針連接器）可用用作遠(yuǎn)程狀態(tài)和控制連接器。在此應(yīng)用中，J1可連接至用戶提供的外部電纜，以承載重置和將中止信號(hào)和LED線路連接到遠(yuǎn)離控制面板的控制面板MVME2603/2604。最大電纜長(zhǎng)度為15英尺。
第4章中的表4-1，連接器引腳分配列出了引腳編號(hào)J1的信號(hào)助記符。
MVME712M過渡模塊準(zhǔn)備MVME712M過渡模塊（圖1-3）和P2適配器板是與MVME2603/2604基板一起使用。MVME712M的特點(diǎn)包括：
? 并行打印機(jī)端口
? 支持AUI連接的以太網(wǎng)接口
? 一個(gè)同步/異步，只有三個(gè)異步，EIA-232-D多協(xié)議串行端口
Serial Port 3 Transmit Clock Configuration (J18)
In synchronous serial communications using the MVME761 transition
module, you can configure Serial Port 3 on the MVME2603/2604 to use
the clock signals provided by the TxC signal line. On MVME761-
compatible versions of the base board, header J18 configures port 3 to
either drive or receive TxC. The factory configuration has port 3 set to
receive TxC. J18 remains open on MVME712M-compatible versions.
To complete the configuration of Serial Port 3, you must set J2 on the
MVME761 transition module (Serial Port 3 clock configuration) as well.
Figure 1-7 and Figure 1-8 (for the MVME712M) and Figure 1-14 and
Figure 1-15 (for the MVME761) diagram the overall jumper settings
required on the MVME2603/2604 and transition module for a Serial Port
3 DCE or DTE configuration.System Controller Selection (J22)
The MVME2603/2604 is factory-configured as a VMEbus system
controller by jumper header J22. If you select the “automatic” system
controller function by placing a jumper on J22 pins 2 and 3, the
MVME2603/2604 determines whether it is the system controller by its
position on the bus. If the board is in the first slot from the left, it
configures itself as the system controller. If the MVME2603/2604 is not to
be system controller under any circumstances, place the jumper on J22
pins 1 and 2. When the board is functioning as system controller, the SCON
LED is turned on.Remote Status and Control
The MVME2603/2604 front panel LEDs and switches are mounted on a
removable mezzanine board. Removing the LED mezzanine makes the
mezzanine connector (J1, a keyed double-row 14-pin connector) available
for service as a remote status and control connector. In this application, J1
can be connected to a user-supplied external cable to carry the Reset and
Abort signals and the LED lines to a control panel located apart from the
MVME2603/2604. Maximum cable length is 15 feet.
Table 4-1 in Chapter 4, Connector Pin Assignments lists the pin numbers
and signal mnemonics for J1.
MVME712M Transition Module Preparation
The MVME712M transition module (Figure 1-3) and P2 adapter board are
used in conjunction with the MVME2603/2604 base board.
The features of the MVME712M include:
? A parallel printer port
? An Ethernet interface supporting AUI connections
? One synchronous/asynchronous, and three asynchronous only,
EIA-232-D multiprotocol serial ports
