![Toho Electronics TRM-00J Скачать руководство пользователя страница 20](http://html1.mh-extra.com/html/toho-electronics/trm-00j/trm-00j_operation-manual_1124835020.webp)
Communication manual TOHO ELECTRONICS INC.
DWG.No. 4B-6829-A
- 17 -
5.1.4.
Things to Be Noted during the Communication
5.1.4.1.
Timing of Transmission
Upon using the communication function, set enough response delay time to ensure the communication (sending/receiving) with the
host computer.
See “
Setting of Response Delay Time
5.1.4.2.
Request Interval
If “request message” is to be sent continuously by the upper computer, wait for at least 2msecs from the arrival of the “response
message” from this product before sending the next request message.
5.1.4.3.
Conditions for Response
This product will not return the “response message” if there is a
time interval of more than 3.5 characters between data that consist of
the “request message” since it cannot identify these data as one whole “request message.”
Therefore, although there is an error in the “request message,”“response message” with the erro
r number (response for the error) will
not be returned unless the above condition is met.
Therefore, the upper computer should resend the necessary “request message” if the “response message” is not returned within
areasonable time.
At a time interval of more than 3.5 characters, this product clears all characters that were received prior to the said interval.
5.1.4.4.
Address Specification Error
This product will not respond to any “request message” that specifies the address that is other than the one that has be
en set to itself.
Therefore, if there is an error in the address section of the “request message,” none of the slave stations will return the “
response
message.”
Therefore, the upper computer should resend the necessary “request message” if the “response message” is not returned within
areasonable time.
At a time interval of more than 3.5 characters, this product clears all characters that were received prior to the said interval.
5.1.4.5.
Number of Digits of Data and Position of Decimal Point
See “
(g) Data Section.”
5.1.4.6.
Operation after the Receiving of Save Request Message
This product starts the saving of data once it receives the save request message correctly from the upper computer.
Only the data that is different from the one stored in EEPROM (changed data) shall be saved. Data will be saved within 6 seconds.
This product will send the response (ACK) when the save request message is received. Some data may be lost if the product is turned OFF
while the saving process is in progress. Do not turn the power of this product OFF for at least 6 seconds after the sending of save request
message.
5.1.4.7.
Saving Data Other than Save Request Message
This product saves the parameter into EEPROM even without receiving the save request message in this case:
・
If the parameter is changed through key operation, it writes only changed parameter and other related parameters.