唯讀型記憶體讀取指令(04)及記憶體列表
Last updated
Last updated
讀取指令中register長度必需小於等於 20個 register。超過該長度的指令會被忽略。
這個範例會讀取即時流量
slave address: 01(本流量計地址)
function code: 04(讀取指令)
讀取數據的啟始地址: 0000(要讀取的數據的啟始地址)
讀取registers 總數: 0002 (需要從 0000 開始讀兩個 register 的記憶體)
CRC: 71 CB(依 CRC 算法計算出的糾錯碼)
slave address: 01(本流量計地址)
function code: 04(讀取指令)
回覆的Byte數: 04(2個register=4byte)
Data Byte: 00 00 00 00(假設目前即時流量為 0)
CRC: FB 84(依 CRC 算法計算出的糾錯碼)
Byte#
1
2
3
4
5
6
7
8
Node ID
Slave Address
Function Code
讀取數據的啟始地址
讀取數據的啟始地址
讀取registers 總數
讀取registers 總數
CRC
CRC
範例內容01~FF
01
04
00
00
00
02
71
CB
Byte#
1
2
3
4
5
6
7
8
9
Node ID
Slave Address
Function Code
回覆的Byte數
Data Byte #1
Data Byte
#2
Data Byte
#3
Data Byte
#4
CRC
CRC
範例內容01~FF
01
04
04
00
00
00
00
FB
84
欄位名稱
功能
Register位置
讀寫記憶體位置與唯讀記憶體不共用。
Register
長度
這個變數的數據長度。以 Register(2Byte)為單位
記憶體內容
用來說明功能。
資料型式
標明收發數據的格式。
Register 位置
Register 長度
記憶體內容
資料型式
註
0000
2
instantaneous flow rate
float 32
0002
2
instantaneous flow velocity
float 32
0004
2
totalized flow volume
float 32
0006
2
analog output in micro-amp
unsigned int 32
0008
1
unsigned int 16
第一個 byte 未定義補0
0009
1
unsigned int 16
第一個 byte 未定義補0
000A
1
unsigned int 16
第一個 byte 未定義補0
000B
1
unsigned int 16
第一個 byte 未定義補0
000C
1
unsigned int 16
第一個 byte 未定義補0
000D
1
history[1] year & month
unsigned int 16
000E
1
history[1] day
unsigned int 16
000F
1
history[1] total method
unsigned int 16
0010
2
history[1] totalized flow rate
float32
0012
1
history[2] year & month
unsigned int 16
0013
1
history[2] day
unsigned int 16
0014
1
history[2] total method
unsigned int 16
0015
2
history[2] totalized flow rate
float32
0017
1
history[3] year & month
unsigned int 16
0018
1
history[3] day
unsigned int 16
0019
1
history[3] total method
unsigned int 16
001A
2
history[3] totalized flow rate
float32
001C
1
history[4] year & month
unsigned int 16
001D
1
history[4] day
unsigned int 16
001E
1
history[4] total method
unsigned int 16
001F
2
history[4] totalized flow rate
float32
0021
1
history[5] year & month
unsigned int 16
0022
1
history[5] day
unsigned int 16
0023
1
history[5]total method
unsigned int 16
0024
2
history[5] totalized flow rate
float32
0026
1
history[6] year & month
unsigned int 16
0027
1
history[6] day
unsigned int 16
0028
1
history[6] total method
unsigned int 16
0029
2
history[6] totalized flow rate
float32
002B
1
history[7] year & month
unsigned int 16
002C
1
history[7] day
unsigned int 16
002D
1
history[7] total method
unsigned int 16
002E
2
history[7] totalized flow rate
float32
0030
1
history[8] year & month
unsigned int 16
0031
1
history[8] day
unsigned int 16
0032
1
history[8] total method
unsigned int 16
0033
2
history[8] totalized flow rate
float32
0035
1
history[9] year & month
unsigned int 16
0036
1
history[9] day
unsigned int 16
0037
1
history[9] total method
unsigned int 16
0038
2
history[9] totalized flow rate
float32
003A
1
history[10] year & month
unsigned int 16
003B
1
history[10] day
unsigned int 16
003C
1
history[10] total method
unsigned int 16
003D
2
history[10] totalized flow rate
float32
003F
1
history[11] year & month
unsigned int 16
0040
1
history[11] day
unsigned int 16
0041
1
history[11] total method
unsigned int 16
0042
2
history[11] totalized flow rate
float32
0044
1
history[12] year & month
unsigned int 16
0045
1
history[12] day
unsigned int 16
0046
1
history[12] total method
unsigned int 16
0047
2
history[12] totalized flow rate
float32
0049
1
history[13] year & month
unsigned int 16
004A
1
history[13] day
unsigned int 16
004B
1
history[13] total method
unsigned int 16
004C
2
history[13] totalized flow rate
float32
004E
1
history[14] year & month
unsigned int 16
004F
1
history[14] day
unsigned int 16
0050
1
history[14] total method
unsigned int 16
0051
2
history[14] totalized flow rate
float32
0053
1
Maximum r value
unsigned int 16
0054
1
Minimum r value
unsigned int 16
0055
2
instantaneous flow rate(X100取整數)
signed int 32
例如原始數值 5.1234，會變成 512，整數以下捨去
0057
2
instantaneous flow speed(X100取整數)
signed int 32
例如原始數值 5.1234，會變成 512，整數以下捨去
0059
2
totalized flow rate
signed int 32
例如原始數值 5.1234，會變成 512，整數以下捨去
005B
2
history[1] totalized flow rate(X100取整數)
signed int 32
例如原始數值 5.1234，會變成 512，整數以下捨去
005D
2
history[2] totalized flow rate(X100取整數)
signed int 32
例如原始數值 5.1234，會變成 512，整數以下捨去
005F
2
history[3] totalized flow rate(X100取整數)
signed int 32
例如原始數值 5.1234，會變成 512，整數以下捨去
0061
2
history[4] totalized flow rate(X100取整數)
signed int 32
例如原始數值 5.1234，會變成 512，整數以下捨去
0063
2
history[5] totalized flow rate(X100取整數)
signed int 32
例如原始數值 5.1234，會變成 512，整數以下捨去
0065
2
history[6] totalized flow rate(X100取整數)
signed int 32
例如原始數值 5.1234，會變成 512，整數以下捨去
0067
2
history[7] totalized flow rate(X100取整數)
signed int 32
例如原始數值 5.1234，會變成 512，整數以下捨去
0069
2
history[8] totalized flow rate(X100取整數)
signed int 32
例如原始數值 5.1234，會變成 512，整數以下捨去
006B
2
history[9] totalized flow rate(X100取整數)
signed int 32
例如原始數值 5.1234，會變成 512，整數以下捨去
006D
2
history[10] totalized flow rate(X100取整數)
signed int 32
例如原始數值 5.1234，會變成 512，整數以下捨去
006F
2
history[11] totalized flow rate(X100取整數)
signed int 32
例如原始數值 5.1234，會變成 512，整數以下捨去
0071
2
history[12] totalized flow rate(X100取整數)
signed int 32
例如原始數值 5.1234，會變成 512，整數以下捨去
0073
2
history[13] totalized flow rate(X100取整數)
signed int 32
例如原始數值 5.1234，會變成 512，整數以下捨去
0075
2
history[14] totalized flow rate(X100取整數)
signed int 32
例如原始數值 5.1234，會變成 512，整數以下捨去