E-922-1-E
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7. COMMUNICATION RETRY FUNCTION
When this instrument is connected in multidrop system, collision of communication data may occur. Therefore,
if no response comes from the host system after data transmission, the following "retry" is carried out.
The retry operation occurs 3 times. If the third retry results in no response, "Communication error" occurs.
<Reference>
Communication timeout time
If the following range (response wait time) is exceeded after transmission of data from this instrument, a
communication error occurs.
Address: 00F4h
Range: 0 to 20 (decimal) seconds
It is necessary to set the retried response wait time for each device connected.
The following is a case where no response comes from the host system after data transmission.
Example: When device address is "A (10)",
Retry time = (ROM address F4h data) + (0.1 sec) x (Device address)
= 10 + (0.1 x 10)
= 11 (sec)
Retry time
No response
Retry time
Data SEND
Retry 1
Data SEND
Data SEND
No response
Retry time
Retry time
No response
No response
Retry 2
Retry 3
"Communication
error" display
Fig. 7.1