Difference between revisions of "User talk:Achims"

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Revision as of 13:11, 22 October 2009

Modbus Control commands for R6:

This commands give you the possibility to control the relays on the R6 via a modbus command send as a hex-file in a tcp stack.

It is easy to connect the R6 extension module to a Barix device with a RS485 interface. You have to wire Pin6 (A) and Pin9 (B) of the DB9 connector to Pin2 (A) and Pin3 (B) of the J1 connector on the R6.

Additional you have to power up the R6 on Pin4 (+) and Pin5 (-) with an external power supply.

The serial settings for the RS485 interface (Serial 2) in the device must set to 19200 Bd, 8E1 (8 Databit, parity=even, 1 Stopbit), Handshake to RS485 direction control and local port to 502.

Now it is possible to send a hex-file, which includes the modbus command, via tcp to port 502 of the device. This can be done with the NetCat Application (nc ip-device < filename ).




Modbus

address

Single

Coil

Address

Hi

Address

Lo

Value

Hi

Value

Lo

CRC

Lo

CRC

Hi

Relay 1

Set

00

05

00

00

FF

FF

CD

AB

Reset

00

05

00

00

00

00

CC

1B

Relay 2

Set

00

05

00

01

FF

FF

9C

6B

Reset

00

05

00

01

00

00

9D

DB

Relay 3

Set

00

05

00

02

FF

FF

6C

6B

Reset

00

05

00

02

00

00

6D

DB

Relay 4

Set

00

05

00

03

FF

FF

3D

AB

Reset

00

05

00

03

00

00

3C

1B

Relay 5

Set

00

05

00

04

FF

FF

8C

6A

Reset

00

05

00

04

00

00

8D

DA

Relay 6

Set

00

05

00

05

FF

FF

DD

AA

Reset

00

05

00

05

00

00

DC

1A












Please note: It is necessary to calculate a crc-check-sum for each command and add it to the command itself.


Here you can find a online crc-calculator:

http://www.lammertbies.nl/comm/info/crc-calculation.html