Appendix 2 Response Time - Toshiba Tosvert RS485 Instruction Manual

Appendix 2 Response time

The communication response time can be calculated from data communication time and inverter
processing time. When wishing to know the communication response time, calculate using the
following as a reference
Data transmission time
PC → Inverter
Data transmission time
Data
* Number of bits = start bit + data frame length + parity bit + stop bit
* Minimum number of bits = 1 + 8 + 0 + 1 = 10 bits
* Maximum number of bits = 1 + 8 + 1 + 2 = 12 bits
<An example of the calculation of the transmission time: 19200 bps, 8 bytes, 11 bits>
Data
Data processing time of inverter
Data processing time: maximum 8 ms
Interval corresponding to 3.5 bytes
Response time
1
=
transmissi on time
baud rate
1
transmissi on time =
19200
Data processing time of inverter (Approx. 8 ms)
Data transmission time
Inverter → PC
×
number of bytes transmitte
× 8 × 11 = 4.6ms
68
E6581315
×
d number of bits