Overview
FINS Protocol
The FINS protocol, fully known as Factory Interface Network Service, is a communication protocol developed by Japan's Omron Corporation for industrial automation control networks. It is primarily used for communication between PLCs (Programmable Logic Controllers) and computers to achieve data exchange and program downloading.
Example
Preparation
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Sinsegye’s iComputer;
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MetaFacture V1.0.4.4 programming software;
1. Open the software and create a new project
2. Select standard project and name it Fins
3. Select Sinsegye device, choose PLC programming language (ST language in this example)
4. Log in to iComputer
5. Right-click "Application" and select "Attribute"
6. Click "Target Memory Settings" - check "Override Target Memory Settings" - click "Yes"
7. Sinsegye supports setting up to 64M of input, output and memory
8. Open the program PLC_PRG, create new variables mapped to %I, %Q, %M
The register addresses in the FINS protocol correspond to PLC addresses as follows:
| Register | PLC Address |
| CIO0~CIO32767 | %I Area |
| CIO32768~CIO65535 | %Q Area |
| D0~D33554431 | %M Area |
When using Sinsegye’s Fins protocol, data size limits are imposed on transmissions between %I Area and %Q Area:
| Variable | Address Range | Max Supported Components | Description |
| %IW0~%IW32767 |
0x0000 ~0x7FFF (0~32767) |
32768 | 16-bit register in %I Area |
| %QW0~%QW32767 |
0x7FFF ~0xFFFF (32768~65535) |
32768 | 16-bit register in %Q Area |
No size limit for %M, maximum 64M
Therefore, in the example PLC:
wIn1 corresponds to address W5 in %I Area (CIO5),
aInput array occupies addresses 100-199 in %I Area (CIO100~CIO199)
wOut1 corresponds to address W3 in %Q Area (CIO32771)
aOutput array occupies addresses 100-199 in %Q Area (CIO32868~CIO32967)
wMem1 is mapped to address W7 in %M Area (D7)
aMem array occupies addresses 100-199 in %M Area (D100~D199)
9. Log in to iComputer, download and run the program
10. Assign arbitrary values to variables. The example assignments are as follows:
| Variable | Initial value |
| wIn1 | 99 |
| aInput[0]--aInput[4] | 11，12，13，14，15 |
| aOutput[0]--aOutput[4] | 101，102，103，104，105 |
| aMem[0]--aMem[4] | 201，202，203，204，205 |
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11. Open the HslCommunication test tool, select Omron—Fins Tcp—enter the IP address (192.168.105.5 in this example), the default port number is 9600, click "Connect.
Fins Read Function
1. Adjust the Big-endian/Little-endian of data transmission. A reconnection is required for the changes to take effect.
2. Read wIn1 with address CIO5, successful read value 99
3. Read wOut1 with address CIO32771, successful read
4. Read wMem1 with address D7, successful read.
5. Read the aMem array of PLC, corresponding to Fins' D100 data, select "ushort read":
6. Batch read D100-D109, set quantity to 10, click "ushort read"
7. Read aInput[0] data in PLC, starting address is CIO100
8. Batch read aInput data
9. Read the aOutput[0] data in PLC, the starting address of %Q area is CIO32767, and the mapped address of aOutput[0] in PLC is %QW100, so aOutput[0] corresponds to CIO32868
8. Batch read aOutput data in PLC
Fins Write Function
1. Write data to wIn1 at address CIO5 with modified value 88
2. Write to %M area: aMem[50] (D150 address), write value 50, click "ushort write".
3. Write to %I area: aInput[51] (CIO151 address), write value 51, click "ushort write".
4. Write to %Q area: aOutput[52] (CIO32920 address), write value 52, click "ushort write".