ALSTOM 3BEB0180卡件配套控制
存儲器電路和備份包括系統(tǒng)和參數(shù)值的程序存儲在閃存PROM D33和D34中。不同的程序可以直接下載到舞會。應用函數(shù)和參數(shù)值保存在閃存PROM D35中。
故障和報警信息以靜態(tài)方式存儲RAM電路。它們的備用電容器為1F、 持續(xù)至少8小時，通常為幾小時天。充電大約需要30分鐘備用電容器。
ASIC功能
ASIC=專用集成電路
大多數(shù)測量和控制功能用于：DCS500在ASIC中完成：
-與控制面板通信（RS 485）
-與勵磁機通信（RS 485）
-測量
-看門狗功能
-A/D和D/A轉換控制
晶閘管觸發(fā)脈沖產生
看門狗功能
控制板有一個內部監(jiān)視器。這個看門狗控制控制板的運行
程序如果看門狗跳閘，它具有以下功能影響：
-FPROM編程電壓被強制為低。
-晶閘管點火控制被重置和禁用。
-數(shù)字輸出被強制為低。
-可編程模擬輸出重置為零，0V。RS485串行通信信道
控制板有兩個RS485通道。這個第一個通道用于勵磁機控制（端子X16:1…3）和第二個用于控制面板
（CDP 310）在端子X33或X34處。端子X33和X34內部并聯(lián)連接。輔助配電
電子電源板POW-1（參見單獨章節(jié)）生成不同級別的電壓。其中一些是通過CON-1電路板直接連接到電路板
其他人被操縱，然后被轉移。以兩種方式監(jiān)控具有不同電壓電平的電子電源系統(tǒng)。那里是一個信號powerfail主電路，用于監(jiān)控POW-1板的輸入電源電壓一個信號powerfail輔助，用于監(jiān)控低電壓電平。如果一個電壓電平低于產生閾值a跳閘信號。除此之外，還具有以下監(jiān)控功能：5V電平。如果+5V下降到跳閘電平以下，
它通過硬件導致主機復位。所有I/O寄存器被強制為0，觸發(fā)脈沖被抑制。
Memory circuits and the back-up
The program including system and parameter values is stored at Flash PROMs D33 and D34. Different programs can be downloaded directly to these
PROMs. Application functionallity and parameter
values are saved in the Flash PROM D35.
Fault and Alarm messages are stored in static
RAM circuits. They have a back up capacitor of 1
F, which lasts minimum 8 hours, typically several
days. It takes about 30 minutes to charge the
backup capacitor.
ASIC function
ASIC = Application Specific Integrated Circuit
Most of the measurements and control functions for
the DCS500 are done in the ASIC:
- communication with control panel (RS 485)
- communication with field exciters (RS 485)
- measurement
- watchdog function
- A/D and D/A-conversion control
- thyristor firing pulse generation
Watchdog function
The control board has an internal watchdog. The
watchdog controls the running of the control board
program. If the watchdog trips, it has the following
effects:
- FPROM programming voltage is forced low.
- Thyristor firing control is reset and disabled.
- Digital outputs are forced low.
- Programmable analogue outputs are reset to
zero, 0V.RS485 serial communication channels
The control board has two RS485 channels. The
first channel is for field exciter control (terminals
X16:1...3) and the second for the control panel
(CDP 310) at terminals X33 or X34. The terminals
X33 and X34 are wired up in parallel internally.Auxiliary power distribution
The electronic power supply board POW-1 (see
separate chapter) generates different levels of
voltages. Some of them are transferred via the
CON-1 board directly to the boards, where they are
used, others are manipulated and then transfered.The electronic power supply system with the different voltage levels is monitored in two ways. There
is a signal powerfail primary, which monitors the input power supply voltage of the POW-1 board and
a signal powerfail secondary, which monitors the
low voltage levels. If one voltage level drops below
the threshold a trip signal is generated.
In addition to that there is a monitoring function for
the 5 V level. If +5 V drops under the tripping level,
it causes a master reset by hardware. All I/O registers are forced to 0 and the firing pulses are suppressed.
