Before Using The Product; About The Operation Manual; Things The Communication Function Can Do; Position (Priority) Of Communication - Toho Electronics TTX-800 Operation Manual

1.

Before Using the Product

1.1 About the Operation Manual

This manual explains the communication function of the TTX-800 (hereinafter referred to as the "Product").

1.2 Things the Communication Function Can Do

The unit is equipped with RS-485 for data communication with the host computer, which allows users to write and read
to items of this product that are described in "6 . List of Identifiers (Codes)," such as "To change, start, or stop items that
can be operated through front keys" and "To read the information that can be displayed on the display section."
Provided, however, that since the RAM of this product is used during the reading/writing of data through ordinary
command, data that was written will be replaced by the previous data (data that is saved in EEPROM) if the power is
turned OFF and then turned ON.
To save the written data into EEPROM of this product, execute the save request message.
（See "3.3.4" and "3.4.4," Things to be Noted During Communication)
Furthermore, unnecessary setting items, such as items that are related to the unattached option, will not be read and
written.

1.3 Position (Priority) of Communication

This product allows the user to change data and parameters through the key even during operation under
communication mode.
Change of settings of data and parameters via communication will be disabled while the product is operated under RO
(Read Only).
(Provided, however, that switching of communication mode is possible.)

1.4 Settings to Be Made Prior to Communication

Several settings need to be made to this product for it to perform a communication function. See

"2. Setting the MODBUS Communication."

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