Thermo Electron Ramsey ORETRONIC III, Руководство по эксплуатации и обслуживанию, Страница: 102 / 143

ORET RONIC
™
Tramp Metal Detector
R E C 4 1 0 5 A - 2
B r o ad c a s t me s s a g e s a r e n o t su p p o r t ed i n t h i s i mp l e me n t a t i o n .
F o l l o w i n g a r e e x a mp l e s o f M o d b u s q u e r y me s s a g e s an d t h ei r r e sp o n s e s .
A.2.1. Example: Read Holding Registers
I n t h i s e x a m p l e , t h e h o s t r e a d s h o l d i n g r e g is t e r s 4 0 0 0 3 – 4 0 0 5 f r o m s l a v e
d e v i c e 5 .
QUERY RESPONSE
Field Name Contents
(Hex)
Field Name Contents
(Hex)
Slave Address 05 Slave Address 05
Function 03 Function 03
Starting Address Hi 00 Byte Count 06
Starting Address Lo 02 Data Hi (Reg. 40003) 02
No. of Registers Hi 00 Data Lo (Reg. 40003) 2B
No. of Registers Lo 03 Data Hi (Reg. 40004) 00
Error Check (16-bit
CRC
)
Data Lo (Reg. 40004) 00
Data Hi (Reg. 40005) 00
Data Lo (Reg. 40005) 64
Error Check (16-bit
CRC
)