Product Model: IOM12682
Overview：
IOM12682 uses the mainstream ARM kernel 32 bit microprocessor that supports Modbus RTU for rapid expansion of controller I/O modules.
Protocol specification：
Modbus support RTU protocol, can quickly realize the controller with the support of the implementation of the protocol of network connection, fast I/O port expansion. Please refer to the specific use of the Modbus RTU test tools.
Main Parameter：
| Processor |
32 bit |
| Clock Frequency |
72MHZ |
| Memory |
64KB flash, 20KB random access memory |
| Power |
DC/AC 24V |
| Communication |
Modbus RTU(2.4k/4.8k/9.6k/19.2k)
BACnet MS/TP(9.6k/19.2k/38.4k/76.8k) |
| Digital Input |
Support dry contact input |
| Digital Output |
Support 24VDC <3A |
| Analog Input |
12 bit resolution, support 0-10V, 0-20mA input |
| Analog Output |
10 bit resolution, support 0-10V, 0-20mA output |
Model specification：
|
Product Model |
BI/DI |
BO/DO |
AI |
AO |
|
IOM12682 |
12 |
6 |
8 |
2 |
Product display ：
Register definition specification：
1.Modbus RTU corresponding register
BI/DI---Input Status(0x02)
|
BI/DI Register Address |
BI/DI |
Instruction |
|
10001 |
1 |
Digital Input Port |
|
10002 |
2 |
Digital Input Port |
|
10003 |
3 |
Digital Input Port |
|
10004 |
4 |
Digital Input Port |
|
10005 |
5 |
Digital Input Port |
|
10006 |
6 |
Digital Input Port |
|
10007 |
7 |
Digital Input Port |
|
10008 |
8 |
Digital Input Port |
|
10009 |
9 |
Digital Input Port |
|
10010 |
10 |
Digital Input Port |
|
10011 |
11 |
Digital Input Port |
|
10012 |
12 |
Digital Input Port |
BO/DO—Coil Status(0x01/0x05)
|
BO/DO Register Address |
BO/DO |
Instruction |
|
00001 |
1 |
Digital Output Port |
|
00002 |
2 |
Digital Output Port |
|
00003 |
3 |
Digital Output Port |
|
00004 |
4 |
Digital Output Port |
|
00005 |
5 |
Digital Output Port |
|
00006 |
6 |
Digital Output Port |
AI---Input Register(0x04)
|
AI Register Address |
AI Port |
Instruction |
|
30001 |
1 |
Analog Input Port |
|
30002 |
2 |
Analog Input Port |
|
30003 |
3 |
Analog Input Port |
|
30004 |
4 |
Analog Input Port |
|
30005 |
5 |
Analog Input Port |
|
30006 |
6 |
Analog Input Port |
|
30007 |
7 |
Analog Input Port |
|
30008 |
8 |
Analog Input Port |
AO—Holding Register(0x03/0x06)
|
AO Register Address |
AO |
Instruction |
|
40001 |
- |
Device address 1
（1-127） |
|
40002 |
- |
baud rate 9600
（19200/9600/4800/2400） |
|
40003 |
- |
Parity bit without
(0- no /1- odd /2-even) |
|
40011 |
1 |
Analog Output Port |
|
40012 |
2 |
Analog Output Port |
2.BACnet MS/TP corresponding register
BI/DI
|
BI/DI Register Address |
BI/DI |
Instruction |
|
0 |
1 |
Digital Input Port |
|
1 |
2 |
Digital Input Port |
|
2 |
3 |
Digital Input Port |
|
3 |
4 |
Digital Input Port |
|
4 |
5 |
Digital Input Port |
|
5 |
6 |
Digital Input Port |
|
6 |
7 |
Digital Input Port |
|
7 |
8 |
Digital Input Port |
|
8 |
9 |
Digital Input Port |
|
9 |
10 |
Digital Input Port |
|
10 |
11 |
Digital Input Port |
|
11 |
12 |
Digital Input Port |
BO/DO
|
BO/DO Register Address |
BO/DO |
Instruction |
|
0 |
1 |
Digital Output , Port |
, , , , ,
|
1 |
2 |
Digital Output Port |
|
2 |
3
Digital Output Port |
|
3 |
4 |
,
Digital Output Port |
|
4 |
5 |
Digital Output Port |
|
5 |
6 |
Digital Output Port |
AI
|
AI Register Address |
AI Port |
Instruction |
|
0 |
1 |
Analog Input Port |
|
1 |
2 |
Analog Input Port |
|
2 |
3 |
Analog Input Port |
|
3 |
4 |
Analog Input Port |
|
4 |
5 |
Analog Input Port |
|
5 |
6 |
Analog Input Port |
|
6 |
7 |
Analog Input Port |
|
7 |
8 |
Analog Input Port |
AO
|
AO Register Address |
AO |
Instruction |
|
0 |
1 |
Analog Output Port |
|
1 |
2 |
Analog Output Port |
AV
|
AV Register Address |
AV |
Instruction |
|
0 |
- |
baud rate 38400
（76800/38400/19200/9600） |
Common Question：
1.ModbusRTU common question:
Q ① : What is the default communication parameter for the module?
A ① : ModbusRTU module default communication parameters are baud rate 9600, data bit 8, stop bit 1, no checksum, device default ID number is 1.
Q ② : How to modify the communication parameters of the module?
A ② :The use of third party software tool ModbusPoll, the control of the 3 register definition Instruction "section 40001, 40002, 40003, read three register data sequentially represents the device address, baud rate, parity check, modify according to" Instruction ", a list of parameters, communication module. After the power is restarted, the set parameters become effective.
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