SAMWONTECH
1st Edition of TEMP880S IM : Sep. 21. 2005 Page 83 / 101
4.3.4 RSD Command
▶ RSD Command is used for reading a series of Data on D-Register.
▶ Format of Transmission
The number
of Byte
1 2 3 1 2 1 4 2 1 1
S
C L
T
Contents
X
Addr RSD , Number , D-Reg. No. SUM
R F
▶ Response
The number
of Byte
1 2 3 1 2 1 4 1 4 1 …
S
T
Contents
X
Addr RSD , OK , dddd-1 , dddd-2 , …
1 4 1 4 2 1 1
C L
, dddd-(n-1) , dddd-(n) SUM
R F
- The Number of : 1~32
- dddd F : Data without a point of 16 number (D)
ex) In case of reading a D-Register from Temperature PV(D0001) to SP(D0002)
- Transmission : [stx]01RSD,02,0001[cr][lf]
- Transmission (including Check Sum) : [stx]01RSD,02,0001C5[cr][lf]
([stx] = 0x02, [cr] = 0x0d, [lf] = 0x0a)
In case the received value of each PV, SP is 50.0 and 30.0, will be received as below ;
- Reception : [stx]01RSD,OK,01F4,012C[cr][lf]
- Reception (including Check Sum ) : [stx]01RSD,OK,01F4,012C19[cr][lf]
※ The process of transforming the PV value of received 16 number data to display on screen.
○
1 Transformation to decimal number : 01F4(16 number-D-) → 500(decimal number)
○
2 Multiply 0.1 to the transformed value. : 500 * 0.1 → 50.0
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