12
CamCor CT and PRO Series Hardware Manual
Section 3
6. Check the position of SW2 (
) and wire the cable as described below:
–
If the switch is in the “IN” (default) position, wire the cable to the I/O board using the procedures described in
Line Wiring of Optional Communications, page
–
If the switch is in the “OUT” position, wire the cable to the TB30 terminal block located on the Maintenance
board.
7. Turn on power to the device.
8. Send a test message to the slave device using Modbus or HART communications. If using Modbus communications,
you must first connect to the slave device. See
Setting Modbus Slave Addresses, page 12
9. Once communications are verified, turn off power to the device.
10. Replace the black plastic cap, ensuring that the position arrow is pointing up (
) and secure with
the fasteners removed in Step 2d.
11. Replace terminal cover B and secure them with the fasteners removed in Step 2a.
Changing the Baud Rate
The baud rate is adjustable using Switch 3 (SW3) on the Maintenance board located in the transmitter body. To change the
baud rate,
1. Turn off power to the device and access the Maintenance board using Steps 1 through 3 of “Using the Default Baud
Rate.”
2. Locate SW3 on the Maintenance board (
) and change the SW3-1 and SW3-2 positions (
) to set the desired baud rate. See the
table below for switch positions.
Note
Switches 3-3 (SW3-3) and 3-4 (SW3-4) are not required for Modbus communications.
Figure 2.7—Closeup of SW3, showing the baud rate set to 38400
BAUD RATE SWITCH SETTINGS
Baud Rate
SW3-1 Setting
SW3-2 Setting
9600
Off
Off
19200
On
Off
38400
Off
On
Do Not Set
On
On
3.
Follow Steps 7 through 11 of
procedure above.
SETTING MODBUS SLAVE ADDRESSES
Slave addresses can range from 1 to 255. Slave Address “0” broadcasts messages to all slave devices and is only available
for Modbus Function Code 16. If the broadcast message contains valid data, the device is updated and no response is sent
to the host system.
If you do not know the slave address of a device to be connected to the CamCor meter, you can set/reset it using the follow
-
ing procedure:
WARNING
Do not use this query while more than one slave is connected. In a multipoint drop connection
setup, all connected slaves share the same address; therefore, resetting the slave address will
assign the same address to all slave devices.
Summary of Contents for CamCor CC001
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