TOHO ELECTRONICS TTM000 User Manual

Page 31

i) Data portion

This specifies data to be written in the register. The data is fixed at 4 bytes. This product
will write data without the decimal point.

Example: In the case of numerical data

Example

Significance of the value

Proportional band (P) = 1.0 %

0 0 0 0 0 0 0 A H

PV = 1200.0 C

0 0 0 0 2 E E 0 H

SV = -10.00 C

F F F F FC 1 8 H

Example: In the case of text data, write the ASCII code "□" (□ is a space)

Content of Communication

HEX Data

Priority Screen 0-1 ＝ □ＩＮＰ

20494E50H

Priority Screen 0-2 ＝ □ＭＶ１

204D5631H

Priority Screen 0-3 ＝ □□Ｐ１

20205031H

j) Error code

If a message from a high-level computer is error-ridden, it will be incorporated in the
"response message" from this product and returned.

The error number "04" is an instrument error (memory error or A/D conversion error, AT
error). It will be incorporated in the "response message" regardless of whether there is an
error in the "request message."

If there are two or more errors occurring at the same time, the largest error number will be
incorporated.

The table below indicates the error contents and classifications.

Error No.

Error contents in the "request message" received by this product

Received an unsupported function code.

Received an address other than the specified one.

The numerical data deviated from the "range of settings designated specifically with

setting items."

Instrument error (memory error or A/D conversion error, AT error)