Mitsubishi MELSEC L Series User Manual page 190

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REMARKS
Criteria when changing the transmission monitoring time (time 2) setting
Find the transmission monitoring time (timer 2) time from the maximum delay time
of external device message receive processing or response message transmission
processing and the transmission time/byte (t) and change the set value.
• Number of bytes transmitted/second (n) = Transmission rate/number of
• Transmission time/byte (t) = 1000 (ms)/number of bytes transmitted/s (n)
• Transmission monitoring time (timer 2) = (Maximum external device processing
Under the following conditions, the transmission monitoring time (timer 2) is set to
300 ms
• Transmission rate
• Number of transmit bits/byte
• Maximum processing delay time : 200 ms
• Transmit byte count
6 CHANGING THE DATA COMMUNICATIONS MONITORING TIMES
transmit bits/byte
delay time) + (transmission time/byte
(t)
: 9600 bps
: 11 (start bit: 1, data bits: 8, stop bits: 2)
: 3 bytes
transmit byte count)
......100 ms units truncated
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