Remote-processing CX-10 Manuale Utente Scaricare il pdf (Pagina 10)

SETUP AND OPERATION - MODBUS and BASIC SECTION 2

Page 2-5

Figure 2-4 Project 3 Modbus Data and Transaction initiation.

Now click on the “Site Service” tab at the top left of the

program.

If not already done, set “Start Reg” to 1 and “# of Regs”

to 12 as shown below. This will return the status of

digital IO and power applied to the board.

Click on the blue “Read(Func03)” button. This initiates

a modbus transaction by requesting registers 1-12 from

the CX-10.

If all goes well, you should get numbers under the

“Data” column (right center of screen).

Note that registers 8 and 9 return external supply voltage

to the board and battery charging voltage. If external

voltage is 0, then power is connected to the battery

terminal.

NOTE:

Registers 8 and 9 automatically return values in

volts only when 12 registers are selected and

start register is 1. If you start from a different

you will get a number between 0 and 4095.

number between 0 and 4095. Register 9 returns

the battery backup voltage as a number between

0 and 4095. To convert this reading into volts,

multiply the value given by 0.007326.

Relays are read and controlled via registers 10 and 19-

26. To turn on a few relays, enter the following

parameters in this order:

Start Reg: 10

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 43 44

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Remote-processing CX-10 Manuale Utente Pagina 10