Thinget XC Series User Manual

Special Functions
7-3. Example of free format communication
This example is the free format program with DH107/DH108 series instruments:
I, Interface specification
DH107/DH108 series instruments use asynchronism serial communication ports, the interface
level fits the standard of RS232C or RS485. the data format is 1 start bit, 8 bits data, no check bit,
one or two stop bits. Baud rate of communication transfer data could modified to be
200~19200bit/s
II, Format of communication instructions
DH107/108 instruments use Hex. data format to indicate each instruction code and data.
Rea ite instruction:
R he a ameter’s (to read) code+0+0+CRC check code
W he address code +43H(67)+ parameter’s (to write) code +the write data’s low byte
write eck code
R ruc rameter’s (To read) code *256+82+ADDR
ADDR is instrument’s ID value, the boun
r nt ca ceding data operate with binary 16 bits
i us. low byte is ahead, the high byte is behind
W truction’s CRC check code is: parameter’s (to write) code *256+67+parameter’s (to
write) value
T et ted
N write or read, the instruments will
The test va e S
r ten chec
P and the read parameter’s value sho ach engrosses 2 bytes, MV
engr ne byte, the data bound is 0~220, t one byte, CRC check code
ngross 2 bytes, the total is 10 bytes.
CRC check code is PV+SV+(alarm status *256+MV)+parameter’s value +ADDR, the
redundant caused by the integer plus
(the detailed format, please refer to AIBUS communication protocol description) .
II, Compile communication program
fter power on, the program read the current temperature value every 40ms. In this period the user
ould also write the set temperature value.
Data area definition: send data buffer area: D10~D19
Accept data buffer area: D20~D29
Instrument’s station ID: D30
Read command’s value: D31=52 H
Write command’s value: D32=43 H
Parameter’s code: D33
Temperature setting: D34
CRC check code: D36
1
d/wr
ead: T ddress code +52H(82)+par
rite: T
+the data’s high byte +CRC ch
ead inst tion’s CRC check code is: pa
d is 0~100 (please do not add 80H). CRC is the
on: the preedunda used by the following operati
nteger pl The redundant is 2 bytes, the
rite ins
+ADDR
he param er’s (to write) value is indica by Hex. binary integer
return the following data
V+ the output value MV and alarm status +
k code
o matter
lue PV+ the given valu
ead/writ parameter’s value +CRC
V, SV
osses o
uld be integer format, e
he alarm status engrosses
e
I
A
c
34

Thinget XC Series Specifications

General

Brand	Thinget
Model	XC Series
Category	Controller
Language	English