[Mikhail]

Hi,
I’ve read. Definitely, there is no notes that Modbus is not standard. Strange, Bosch is well known brand.

Before decide, you should try to read other kind of data – input registers and check if it works or not, and what the issues are.

Also I strongly recommend trying Modbus RTU mode. It is strict and includes check sum. There is no way to dodge with protocol.

[Mikhail]

Hi,
The chart drawn by the web application of Rapid SCADA can’t be used for automatic mail, because it’s generated by JavaScript in a user’s browser. The special module have to be developed that run on a server side. We can develop the module for you as a custom development or consult you how to do it by yourself.

[Mikhail]

Example:
Expected value of the tag #1 is 10, actual value is 0.

[Mikhail]

Currently, it’s not implemented. Planned in the future version of schemes.

[Mikhail]

I mean:
What is Enron Modbus?
Enron Modbus is a modification to the standard Modicon modbus communication protocol developed by Enron Corporation.
See http://www.simplymodbus.ca/FAQ.htm#enronmod

[Mikhail]

Hi Marek,

Probably the device uses a derivative protocol based on Modbus, but not standard Modbus. And this is the cause of the problems. Please read carefully the device manual. What is written in the manual about the supported protocol?

[Mikhail]

Do you mean that you can open the web application locally, but can’t access remotely?
HTTPS may require additional setup. Does HTTP work?

[Mikhail]

Try requesting 8 coils.

[Mikhail]

Hi,
It’s difficult to understand what values are expected in Communicator?

[Mikhail]

The official Modbus specifications are here http://modbus.org/specs.php
You need http://modbus.org/docs/Modbus_Application_Protocol_V1_1b3.pdf and http://modbus.org/docs/Modbus_Messaging_Implementation_Guide_V1_0b.pdf

[Mikhail]

Hi,
According to the Modbus specification, in the response
00 00 00 00 00 06 02 01 02 88 02
06 is “Number of following bytes”. You can see only 5 bytes after 06. So the response is not correct.

The correct response would be 00 00 00 00 00 05 02 01 02 88 02
I think, Simply Modbus doesn’t validate the incoming data.
Do you have any idea why the device sends incorrect Modbus packages?

[Mikhail]

Hello,
Please clarify your question.

[Mikhail]

I suppose, you should install and switch on the Chart Pro plugin. It is used by Dashboard if a chart contains more that 1 input channel.

[Mikhail]

The example of using the API.

[Mikhail]

Hi,

Find the API here. The descriptions of the methods are included in this file as comments.

[Author]

Posts