Toho-electronics TTM-00BT Bedienungsanleitung PDF herunterladen (Seite 24)

7.9.9 Code description

n Codes from ① STX to ⑫ memory bank function are expressed in ASCII codes.

n For the ASCII codes, see "7.9.13. Table of ASCII codes."

n For the procedure for conversion to ASCII codes, see communication examples 7.9.11 and

7.9.12.

① STX

This code is necessary for the receiver to detect the top of a message. This is affixed to the

top of the character string to be transmitted.

② Unit number

This code is for a higher-level computer to identify the communication partner (this product).

Unit numbers are changed by using the rotary switch.

Set range: 0 to F (to be set in a hexadecimal number)

*Before changing a setting, always turn off this product.

③ Setting channels

This function is for setting channels for reading and writing data in this product.

Set range: 1 to 8 (each channel), A (all channels 1 to 8)

*Before changing a setting, always turn off this product.

④ Contents of requests

Enter either of the following codes: R, W, r, or w.

R (uppercase, 52H): For reading data from this product

W (uppercase, 57H): For writing data in this product or for saving data in this product

r (lowercase, 72H): For reading data from the memory bank of this product

w (lowercase, 77H): For writing data in the memory bank of this product or for saving data

in this product

⑤ Identifier

An identifier is a classification code (identifier) for data to be read or written and expressed in

a three-digit alphanumerical ASCII code. See "6. Table of identifiers."

⑥ Numerical data

These are data to be read or written, and are all expressed in five digits regardless of the type.

Negative data: The "-" (minus) sign is in a single digit at the largest digit.

Position of the decimal point: 5-digit data does not include a decimal point.

Example: The table below indicates the significances of 5-digit numerical data 00010.

Example Significance of the value

Proportional band (P) →1.0%

Data (PV), etc, whose decimal point can be shifted

When the decimal point setting (DP) is 0 →10

When the decimal point setting (DP) is 0.1 →1.0

⑦ ETX

This code is needed for the receiver to detect the end of a message. It is affixed to the end of a

character string to be sent (except for BCC).

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Toho-electronics TTM-00BT Bedienungsanleitung Seite 24