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參數(shù)資料
| 型號： | UT1553 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | BCRTM |
| 中文描述： | BCRTM |
| 文件頁數(shù)： | 18/61頁 |
| 文件大?。?/td> | 2024K |
| 代理商： | UT1553 |
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BCRTM-25
6.1.2 Message Status Word
Each message the BCRTM transacts has a corresponding
Message Status Word, which is pointed to by the Message
Status List Pointer of the Descriptor. This word allows the
host CPU to evaluate the message’s validity, determine the
word count, and calculate the approximate time frame in
which the message was transacted (figures 7 and 8).
Message Status Word Definition
Bit
Number
Description
BIT 15
Subsystem Failed. Indicates SSYSF was asserted before the Message Status Word transfer to memory. This
bit is also set when the user sets bit 13 of Register 10.
BIT 14
Broadcast Message. Indicates that the corresponding message was received in the broadcast mode.
BIT 13
Message Error. Indicates a message is invalid due to improper synchronization, bit count, word count, or
Manchester error.
BITs 12-8
Word Count. Indicates the number of words in the message and reflects the Word Count field in the command
word. Should the message contain a different number of words than the Word Count field, the Message Error
flag is triggered. If there are too many words, they are withheld from RAM. If the actual word count is less than
it should be, the Message Error bit in the 1553 status word is set.
BITs 7-0
Time Tag. The BCRTM writes the internally generated Time Tag to this location after message completion.
The resolution is 64
s. (See Register 13). If the timer reads 2, it indicates the message was completed 128 to
191
s after the timer started.
ASSERTED DURING THIS MESSAGE
MESSAGE ERROR
MESSAGE WAS BROADCASTED
SUBSYSTEM FAIL INPUT WAS
Figure 7. Message Status Word
WORD COUNT
TIME TAG
15
14
13
12
8
7
0
MESSAGE
(FROM RT DESCRIPTOR)
Figure 8. Remote Terminal Data and Message Status List
#5
#4
#3
#2
#1
#5
#4
#3
#2
#1
LIST
MESSAGE STATUS WORD
DATA LIST
POINTER
DATA LIST
LIST POINTER
MESSAGE STATUS
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| UT1553B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:RTI Remote Terminal Interface |
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| UT1553B/BCRTM-ACXA | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:BCRTM |
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