Yokogawa Data Acquisition with PID Control CX2000 - Manual (Page 237)

9-4
IM 04L31A01-17E
9.2 Setup Procedure of the Green Series
Communication Function
Set up the Green Series communications in the following order.
1. Connect the external devices (controllers) using the serial interface.
Connect multiple devices with the CX as the host computer. For a description of
how to connect the devices, see section 3.3, “Terminal Arrangement and Signal
Names and the Connection Procedure of the RS-422/485 Interface.”
2. Set the serial interface.
Set the serial interface according to the communication condition of the CX and
the connecting models. Set the protocol of the CX to Modbus master; set the
protocol of the connecting models to Modbus slave. For a description of the
serial interface settings of the CX, see section 3.5, “Configuring the Serial
Interface.”
3. Enter the Modbus master settings.
Set the CX to Modbus master. For the procedure, see sections 9.3, “Setting the
Modbus Master.”
4. Set parameters related to external loops.
Enter settings for operating and monitoring the control loops of the connecting
models. For the procedure, see the descriptions on setting various parameters
related to external loops in section 9.4 to 9.6.
5. Check the operating conditions of the Green Series communication
function.
See section 9.7, “Checking the Operating Conditions of the Green Series
Communication Function.”
6. Start the operation.
See section 9.8, “Starting the Operation.”
7. As necessary, carry out tasks during operation.
See section 9.9, “Carrying Out Tasks during Operation.”