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Home modified by Doug Lyons

Doug Lyons — Tue, 10 Dec 2024 06:49:52 -0000

--- v42
+++ v43
@@ -42,5 +42,8 @@
 Eventually I decided that I wanted to make my changes and improvements available to others.
 I created this SourceForge project to do that and continue to make updates as I find the need.

+This project has  been cloned on Github by Pavel Kostromitinov  and can be found here:
+https://github.com/Cavaler/ModRSsim2/
+
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Home modified by Doug Lyons

Doug Lyons — Tue, 10 Dec 2024 02:16:08 -0000

--- v41
+++ v42
@@ -1,6 +1,6 @@
-2024-Jan-27
+2024-Dec-09

-Version 8.21.2.8 is the current version.
+Version 8.21.2.9 is the current version.

 This project is a fork of mod_RSsim ([www.sourceforge.net/projects/modrssim](http://sourceforge.net/projects/modrssim)) which is also hosted on this site.
 I had run into this program a couple of times in the past, but I did not have time to try and learn a new program then.

Discussion for Home page

Doug Lyons — Tue, 12 Nov 2024 21:37:52 -0000

Mr. Duarte,
Would you be willing to share your VBS code here so that it might benefit others? Thanks.
Doug Lyons

Discussion for Home page

AMILCAR DUARTE — Wed, 06 Nov 2024 11:09:02 -0000

Mr. Doug,

Thank you very much for the feedback.

I have explored a little bit more of the software and, following up on your sugestion, I was able to implement the Set/Get float32 in VBS.

Discussion for Home page

Doug Lyons — Mon, 04 Nov 2024 03:50:52 -0000

Mr. Duarte,

If you look at the 2nd row of selections near the top of the display, there is one that shows "Fmt:".
You can use the pull-down selection and set this to "float 32". This will allow you some options.
Because a 32-bit float takes two 16-bit registers, they can begin on either an even or odd address.
Since the system does not know which is intended, the display attempts to show both values.
So you have to decide whether to read/write to the even or odd address.
I see that you reference "SetRegisterValue" and "GetRegisterValue".
These functions do not support setting floating point registers at this time.
But since the source code is provided, it would be possible to extend it fairly easily to do this.
You could use REG_TYPE of 5 (which is not used) to indicate a 32-bit float number.
Now the programming would have to be extended to handle the details, but it could be done.
Otherwise, you would have to enter the 32-bit float as two Set/Get Register Values.
I hope that this helps. Good Luck. Doug Lyons

Discussion for Home page

AMILCAR DUARTE — Sat, 26 Oct 2024 18:57:23 -0000

Hello Mr. Doug,

I am new to ModRSim2, and I have been trying to update IEEE32 floats using the scripts, with no luck so far.

Using the SetRegisterValue and GetRegisterValue I can only manipulate one register at a time, and the float32 gets truncated.

All the VBS solutions I have found for converting IEEE32 to two words or to four bytes, and vice-versa, seem to use VB functions that are not accepted by the script compiler.

Do you have any workaround for handling float32 in ModRSim2 ?

Thanks in advance

Discussion for Home page

Doug Lyons — Tue, 01 Oct 2024 20:52:10 -0000

Hello, Kali. The ModRSSim2 server takes its IP address from the computer that it is running on.
Therefore, it is possible by doing something similar to the following.
Install a Virtual Machine server such as Virtual Box or VMWare. Now install an operating system in two seperate instances. You can find a free version of ReactOS that is capable of running this at
https://sourceforge.net/projects/reactos/files/ReactOS/0.4.15-ReleaseCandidates/.
Set these two machines to have dedicated IP addresses that correspond to the two IP address that you want to simulate. Good Luck. Doug Lyons

Discussion for Home page

Kali — Wed, 11 Sep 2024 13:48:41 -0000

Hi. Is it possible to run 2 instances of ModRSsim2 with to different IP?. I need to simulate 2 diferent IP both with the same ID.

Discussion for Home page

Don Burdette — Tue, 26 Mar 2024 15:29:30 -0000

My task is to set the machine's clock to UTC using a PC connected by modbus. Hundreds of these will be deployed across the country and beyond. Requiring manual intervention by the end user is not an option.

So, not at all knowing what I'm doing, I've been slogging around the swamp for a while, and I think I stumbled on the answer. I ended up here:
https://learn.microsoft.com/en-us/windows/win32/wmisdk/swbemdatetime

Based on that, I came up with this, which appears to work:

Set dateTime = CreateObject("WbemScripting.SWbemDateTime") 'create a date/time object
dateTime.SetVarDate(Now()) 'put the current time into the object
d = dateTime.GetVarDate (false) 'the false value retreives UTC time

SetRegisterValue 3, 1, DatePart("s", d) 'load seconds into modbus holding register at address 1
SetRegisterValue 3, 2, DatePart("n", d) 'minutes
SetRegisterValue 3, 3, DatePart("h", d) 'hours
SetRegisterValue 3, 4, DatePart("w", d) 'day of the week
SetRegisterValue 3, 5, DatePart("d", d) 'date (day of month)
SetRegisterValue 3, 6, DatePart("m", d) 'month
SetRegisterValue 3, 7, DatePart("yyyy", d) 'full year

Discussion for Home page

Doug Lyons — Tue, 26 Mar 2024 00:27:57 -0000

Don,

It seems to me you should be able to just look up this key's value in the machine manually:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation\Bias.

Then just take this value (300 for Eastern Time) and plug it into the script as shown below.

dim d

d = DateAdd("n", 300, Now())

SetRegisterValue 3, 1, DatePart("s", d)
SetRegisterValue 3, 2, DatePart("n", d)
SetRegisterValue 3, 3, DatePart("h", d)
SetRegisterValue 3, 4, DatePart("w", d)
SetRegisterValue 3, 5, DatePart("d", d)
SetRegisterValue 3, 6, DatePart("m", d)
SetRegisterValue 3, 7, DatePart("yyyy", d)

Because "Now()" will be automatically updated for Daylight Time by default, this should work.
Note that you do not want the "ActiveTimeBias" because this changes for Standard Time and Daylight Time, so you would be double compensating if you used this dynamic value.
You should not need to even read the registry, just use the offset based on their Time Zone.

Doug Lyons