forum.rcware.eu Forum: SoftPLC IDE (english)

Jan Vidim on "Carel - Modbus integration"

Jan Vidim — Tue, 27 Oct 2009 10:33:26 +0000

According to http://www.carel.com/carelcom/web/eng/catalogo/gamma_dett.jsp?id_gamma=39&id_tipologiaProdotti=55&id_mercato=3 , it is possible to use a customized driver to interface directly the Carel internal bus. However, considering the effort - what about to use Carel configured for Modbus/RS485 and a MiniPLC as an excellent example of embedded web server, with free tools and support? :-)

guest on "Carel - Modbus integration"

guest — Mon, 12 Oct 2009 18:11:00 +0000

Any idea about Carel proprietary protocol??? I`d like to interface IR33 with microcontroller and make a small web server
Thanks

Anonymous on "IPLC detection issue"

Anonymous — Fri, 10 Apr 2009 11:10:46 +0000

There is a problem when detecting Beck from SoftPLC on Windows Vista x64 configuration with VMWare installed.

Solution, that can be applicable also in other cases is to Disable other Network Connections than the one that the IPLC is connected thorough.

Jan Vidim on ""Cannot open project" message"

Jan Vidim — Fri, 27 Feb 2009 14:12:13 +0000

This may appear if a project which has been created or edited in a newer version is attempted to open in an older version which does not contain all libraries (drivers) used in the project.

Cure: Use the same IDE version which worked last time or use the most recent version.

Jan Vidim on "Carel - Modbus integration"

Jan Vidim — Wed, 12 Dec 2007 10:40:59 +0000

The Carel pCO2 and pCO3 controllers can be equipped by a Modbus communication card. It enables reading and writing variables prepared in the Carel controller. Some vars can be read only, some can be written - this is up to the Carel engineer. The output of the Carel delivery should be a table with three types of variables, which is used as source for SoftPLC IDE enfineering.

Carel uses three variable types: Analog, Integer, and Boolean. Analog is so called HVAC integer, i.e. signed integer with one decimal position: 201 actually means 20,1.

Analog: read Modbus function F03, write F06. All is Hi-Lo, Signed.
Addressing starts at 2, 3, 4, 5... up to 127 (?). Quantity of inputs (bytes): 2.
Set the KP parameter to 0.1, which gives the decimal point.

Integer: read Modbus function F03, write F06. All is Hi-Lo, Signed.
Addressing starts at 130, 131, 132, 133... Quantity of inputs (bytes): 2.

Boolean: read Modbus function F01, write F05.
Addressing starts at 2, 3, 4, 5... Quantity of inputs (bytes): 1.

Comm line parameters: at the Carel controller set the BMS address (Modbus slave address), Modbus protocol, and comm speed. Tested at 19200, 8, N, 1, no flow control.

The Carel controllers are used by Lennox, labeled as Climatic 50.

Jan Vidim on "Boiler shifts - unused outputs"

Jan Vidim — Fri, 07 Dec 2007 12:13:45 +0000

The T14 (Boiler shift) and T15 (Timed boiler shift) may rotate all 16 outputs in spite of the fact that only few of them (e.g. 3) are marked as "outside" (and therefore used).

To avoid this, please check the "Generate only used variables" option in the Platform config when compiling.