ICP DAS USA I-7521, User Manual

Page: 38 / 148

I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527 User’s Manual,Ver2.5 Aug.2015
38
2.5 752N protocol description
[Address]
There is a initial address for I-752N series module.
For example: (assume initial address is 01, CrLfmode is 4, data format=9600, N,
8, 1 for COM2 of a I-7522A module)
command response
$01A !01 ----> the initial address is 01
$02A !01 ----> the initial address is 01
$03A ?01 ----> an invalid command
$01A05 !01 ----> changes the initial address to 05, so COM1 is
now 05 and COM3 is now 06
$06A
!05 ----> the initial address is 05
[CrLfmode]
There are five modes for I-752N when receiving commands (COM2) and
receiving responses (COM1, 3~8).
We call this mode "CrLfmode". The default CrLfmode is 4 for all COM ports.
Note: More information about the CrLfmode command can be found in Sec.
5.3.12.
a: CrLfmode=0/1/2/3
In these modes, the I-752N module judges when the command/response
string ends based on the end character of the command/response string.
For example: (initial address is 01, I-7522A)
Assume CrLfmode=0 for COM2,
COM2 determines the end of a command string when it encounters the 0x0D
(CR) character. When manually entering individual command characters using
a PC terminal application, the 0x0D (CR) character must be sent as the final