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Parameter
Transmission waiting time
This is a parameter to set the transmission waiting time. The transmission waiting time is a time after the slave switches
its communication line to the transmission mode upon receiving a query from the master, until it starts sending
a response (The actual transmission waiting time corresponds to the silent interval (C3.5) plus the value set in the
"Transmission waiting time" parameter). If the value in the "Transmission waiting time" parameter is set to a shorter time
than a time when the host controller switches to a receivable state, an error will occur in the host controller. Also, when a
timeout, etc. is set in the host controller, an error will occur in the same way if the setting time is too long. Set according
to the host controller.
Query
“Transmission waiting time”
parameter
C3.5
Response
Transmission waiting time
Silent interval
This is a parameter to set the silent interval. Be sure to provide an interval of 3.5 characters or more as the transmission
waiting time for the silent interval. If this waiting time is less than 3.5 characters long, the driver cannot respond.
When the "Silent interval" parameter is set to "0.0: Set automatically," the silent interval varies depending on the
transmission rate.
z
When the "Silent interval" parameter is set to "0.0: Set automatically"
Transmission rate (bps) Silent interval Frame interval of master (reference)
9,600 4.0 ms or more 5.0 ms or more
19,200
38,400
57,600
115,200
230,400
2.5 ms or more 3.0 ms or more
Note
•
If frames are received at an interval shorter than the required silent interval, the frames are discarded and a
communication error occurs. When a communication error occurs, check the silent interval of the slave and reset
the frame transmission interval.
•
The silent interval may vary depending on the product series connected. When connecting multiple product series,
set parameters as follows.
- "Silent interval" parameter: "0.0: Set automatically"
- "Transmission waiting time" parameter: 1.0 ms or more
•
In a system that the only products having the "Silent interval" parameter are connected, providing the common
setting in the "Silent interval" parameter can improve the communication cycle. Use in a state of setting to "0.0: Set
automatically" normally.
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