This example screen uses the Modify Multiple Registers feature.
Figure 7. Modify Multiple Registers - Configuration Example
1. Click on the Modify Multiple Registers tab. Use this screen to quickly modify multiple local registers at a time.
2. Select the range of registers to change.
3. Select the fields to change in each local register. In our example, registers one through six will be changed and the
names will be GPS Reg followed by an auto-incremented number. This example will also change the LCD
permissions flag to
read
to allow the values of the local registers to display on the DXM700's LCD.
4. Click Change Registers to change the registers.
2.2.2 Step 2: Read the Registers
Under Register Mapping, the Read Rules or Write Rules interact with the Local Registers to exchange data with external
Modbus devices.
This example screen shows a read rule created to read six registers (address 1 through 6), from Modbus Slave 4. The
results are stored in the Local Registers 1 through 6.
Figure 8. Read Rules - Configuration Example
1. Change to the Register Mapping > Read Rules tab to define a Modbus read.
2. Click Add Read Rule.
3. Click the arrow next to the new rule to expand the information.
4. Type in a name into the name field.
5. Select the slave address. In this example, we will read from Slave ID 4.
6. Select the starting register and ending register. In this example, we will read from register 1 through register 6.
7. Select the beginning local register on the DXM700.
8. Enter a polling frequency. In this example we have entered five seconds.
9. If necessary, select the error condition. For this example, if the read function fails after three attempts, the read rule
writes 12345 to the DXM700 local registers. Notice the list of local register names this read rule is using.
Sure Cross
®
DXM700-Bx Wireless Controller
14
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