SMC Networks HECR Series Communications Manual

MODBUS communication function
5-3 HECR
◼ Product set up procedure
The communication protocol is a command based protocol using the Modbus protocol. The communication
will be available for sending the communication commands after setting up the product.
1) Select communication protocol
･Select Set Mode Level 3 by pressing the "SEL" and "△" buttons, then select RS-485 or
RS-232C.
･If RS-485 is selected, set resistance of the terminating resistor.
･Press the "SEL" button once to display "Unit number", and select slave address (1H to
0FH) by pressing the "△" button (Unit 0 cannot be used).
･Press the "SEL" button and set the baud rate, parity, data length and stop bit with the
“△” or “▽” button.
･Press the "SEL" button twice to display "Communication Protocol", and select "Modbus"
by pressing the "△" button.
2) Setting of the control mode
･ Select Set Mode Level 1, and press the "SEL" button twice to display "Control
Operation". Then, select "5. SeriRem" (Serial remote mode).
When this mode is selected, the thermo-con stops the operation at once. Also, the set
value is not able to be changed with the control panel when this mode is selected.
3) Send command
In the serial remote mode, the control operation, etc of the thermo-con can be set by
sending the communication commands.

SMC Networks HECR Series Specifications

General

Brand	SMC Networks
Model	HECR Series
Category	Chiller
Language	English