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參數(shù)資料
| 型號： | ES51988 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 3 3/4 AUTO REL/MAX/MIN |
| 中文描述： | 3 3 / 4自動(dòng)REL /最大值/最小值 |
| 文件頁數(shù)： | 14/22頁 |
| 文件大小： | 254K |
| 代理商： | ES51988 |
14 91年11月28日
3 3/4 AUTO REL/MAX/MIN
ES51988
(4) Serial Data Output
The serial data is output two times from SDO pin on each A/D conversion cycle.The data
format satisfy JIS 7BIT transmission code and the baud rate is 2400,it means the receiver
terminal can use RS-232 interface to read data .
single package
A single package include a start bit(0),D0~D6(7 bit), a parity check bit(odd) and a
stop bit(1).All the data stream is consist of 110
×
2 bits. The high and low voltage levels
correspond to DGND and V- respectively. SDO remains at 1 (high) when it is inacetive.
Hence the start bit(0) could be used as the triggering signal to begin the reading process.
all package
0
p 1
P
0V
-3V
LSB
MSB
D0 ~D6
0
p1
status
digit2
digit3
function
range
option1
CR
LF
digit0
digit1
0
p1 0
p1
0
p1 0
p1 0
p1
0
p1 0
p1 0
p1
0
p1 0
p1
option2
Digit0 ~ 3 data is exactly the receiver display number,but the status, function,range,
option1,option2 data all need written program to judge what the data mean.
Note : LSB bit is sent first,then MSB bit.
The meter always outputs the current input value to the serial port in spite of HOLD
mode. Each block is repeated twice in one conversion cycle. The detailed data format of each
packet is listed below.
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