It converts Modbus polling function to event. It uses NModbus
class Program
{
static void Main(string[] args)
{
myDevices = Creator.FromFile("addresses.csv");
if (myDevices == null)
{
return;
}
myDevices.TagStatusChanged += MyDevices_TagStatusChanged;
myDevices.StartDevices();
Console.ReadLine();
}
private static void MyDevices_TagStatusChanged(object sender, TagChangedEventArgs e)
{
if (e.quality)
{
Console.WriteLine(e.Name + ": " + e.Value);
}
}
}The CSV file consists of two parts. The first section contains device information. The second section contains address information.
Device section:
| Row Type | Device | Ip | Port | Device ID | Refresh Rate | IsActive |
|---|---|---|---|---|---|---|
| device | Device1 | 10.3.4.247 | 502 | 1 | 1000 | 1 |
| device | Device2 | 10.3.4.248 | 502 | 2 | 2000 | 1 |
| Column Name | Description |
|---|---|
| Row Type | Must be 'device' for device section |
| Device | Device name |
| Ip | IP address to connect |
| Port | Port to connect |
| Device ID | An unique number for device |
| Refresh Rate | Refresh rate in milliseconds |
| IsActive | 1: Active, 0: deactive |
Tag section:
| Row Type | Tag | Device | Address | Modbus Type | Direction | Type | MaskType | Mask | Merge Type | Range |
|---|---|---|---|---|---|---|---|---|---|---|
| tag | TagName1 | Device1 | 1 | cs | read | bool | none | 0 | ormerge | 0 |
| tag | TagName2 | Device1 | 2 | cs | read | bool | none | 0 | ormerge | 0 |
| tag | TagName3 | Device2 | 2 | cs | read | bool | none | 0 | ormerge | 0 |
| Column Name | Description |
|---|---|
| Row Type | Must be 'tag' for tag section |
| Tag | A tag for address |
| Device | Device name written in the device section |
| Address | read address x: only reads x, x y: reads x and y, x-y: reads x to y |
| Modbus Type | cs: Coil Status, is: Input status, hr: holding register, ir: input register |
| Type | bool: boolean, ushort: ushort, lsrf: lsrf float, msrf: msrf float |
| MaskType | none, andmask, ormask |
| Mask | ushort mask value |
| Merge Type | ormerge, andmerge |
| Range | ushort range value |
Sample CSV file:
//device,Device,Ip,Port,DeviceId,RefreshRate,IsActive
device,Device1,10.3.4.247,502,1,1000,1
device,Device2,10.3.4.248,502,2,1000,1
//tag,Tag,Device,Address,ModbusType(cs/is/hr/ir),Direction(read/write),Type(bool/ushort/lsrf/msrf),MaskType(none/andmask/ormask),Mask,MergeType(andmerge/ormerge),Range
tag,TagName1,Device1,1,cs,read,bool,none,0,ormerge,0
tag,TagName2,Device1,1,cs,read,bool,none,0,ormerge,0
tag,TagName3,Device2,1,cs,read,bool,none,0,ormerge,0