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If you create the parameter in the same way as you checked this example, the file will be created ? If yes, try using the API
00 Unit identifier 0x00 (0)
Specify in the database, in addition to the IP address, also the address for the RTU mode, if the device has the ability to poll on the 485 interface or just 1
Mikhail promised to implement this in the next version of Scada. Now you can try using Grafana for these purposes
BB-Code full and paste IMG
I installed rapidscada on a Debian 10 VPS server with a public IP address
Some remote objects are also connected to this server with the installed Communicator via 4G networks
On the server, raise l2tp/IPsec
packages – strongswan (ipsec) and xl2tpThe remote communicator transmits data to the Scada server and at the same time has an IP address in the VPN network. By connecting to the server as an l2tp client from a Windows PC you can access remote communicators both via SSH and to download projects
I use a Raspberry Pi (Zero) for remote Communicators and can prepare an image with version 5.8.2 by spending a little time over the weekend deleting my server’s keys and passwords. Would you be interested ?
output channel – SetVal(43,Cmd)
input channel 43 – Val(43) and in table “output channel” set 43, channel is CalculatedOnly for the initial installation and migration of driver libraries, for example. Edit the Instance name and key for the Agent. Otherwise, the project is transferred using the Agent from Windows to Linux without problems.
WinSCP and SSH connection are enough to copy and install files.
I do not know how advanced it is, it is better of course to use third-party applications for organizing RAM disk, which independently saves data to disk. Unlike tmpfs, as there are some limitations.
For example var stuffed into tmpfs does not allow xrdp to run
1st input channel use the formula – LoadRet()
Channels that require saving – Retain(Val(43))
Retain(here there can be a formula that returns necessarily double)In the last channel, the formula – SaveRet()
65535 use the formula – SaveRet()Any solution can lose value during a hard reboot, but if the variables do not change often, then you can use different options.
Retain Formula for writing a variable to a file retain.txt
string pathRet = @"/opt/scada/ScadaServer/Config/retain.txt"; Dictionary<int, double> DictRet = new Dictionary<int, double>(); public double Retain (double ret) { DictRet[CnlNum] = ret; return ret; }Example of applying the formula in the input channel database. Retain(Val(150))
The control channel can contain setval(150, Cmd)The lowest input channel uses the load_retain formula
Recording in the loadret channel()bool initRet = false; double LoadRet() { if (!initRet) { if (System.IO.File.Exists(pathRet)) { string[] RetLoad = System.IO.File.ReadAllLines(pathRet, Encoding.UTF8); for (int i = 0; i < RetLoad.Length; i++) { SetVal(Convert.ToInt32(RetLoad[i].Substring(RetLoad[i].IndexOf("[")+1, RetLoad[i].IndexOf(", ")-(RetLoad[i].IndexOf("[")+1)),10),Convert.ToDouble(RetLoad[i].Substring(RetLoad[i].IndexOf(", ")+2,RetLoad[i].IndexOf("]")-(RetLoad[i].IndexOf(", ")+2)))); } initRet = true; } } return Convert.ToDouble(initRet); }Executed once at server startup
The most recent channel uses the save_retain formula
Entry in the saveret channel formula()double SaveRet() { string[] RetSave = new string[DictRet.Count]; bool eq = false; for (int i = 0; i < DictRet.Count; i++) { RetSave[i] = Convert.ToString(System.Linq.Enumerable.ElementAt(DictRet, i)); } if (!System.IO.File.Exists(pathRet)) { System.IO.File.WriteAllLines(pathRet, RetSave, Encoding.UTF8); return 0; } else { string[] RetOld = System.IO.File.ReadAllLines(pathRet, Encoding.UTF8); eq = System.Linq.Enumerable.SequenceEqual(RetOld, RetSave); if (!eq) { System.IO.File.WriteAllLines(pathRet, RetSave, Encoding.UTF8); } } return Convert.ToDouble(eq); }The path to Raspberry specify your own in the first formula.
An example file retain.txt[450, 23]
[451, 51]
[452, 51,5]
[453, 46]The first digit is the channel number, the second is the channel value.
The file is written when the variable specified as Retain is changed.
You can also initialize the necessary variables when starting the server.For changing variables in the process of work, but which need to be saved, it is better to add probably another timer and record no more than x minutes. I think so.
For configuration variables that rarely change, you can use as-is.On Raspberry, I used formulas to save and read channel data to a file. Since the values fall into RAM (tmpfs)
