Transmission Delay Time; As-I Cycle Time - Mitsubishi Electric QJ71AS92 User Manual

6 TRANSMISSION DELAY TIME

6 TRANSMISSION DELAY TIME

6.1 AS-i cycle time

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This chapter describes the transmission delay times of the QJ71AS92.
(1) AS-i Ver. 2.04-compatible I/O slaves
AS-i cycle time = 171µs x (number of communicating slaves + 2)
(2) AS-i Ver. 2.11-compatible I/O slaves
(a) Cycle time for the slaves that use the same address in group A and B
AS-i cycle time = {171µs x (number of communicating slaves + 2)} x 2
(b) Cycle time for the slaves that use different addresses in group A and B is
the same as described in (1).
(3) Analog slaves
AS-i cycle time = {171µs x (number of communicating slaves + 2)} x 7 x (number
TIP
Count the number of communicating slaves as described below.
AS-i Ver. 2.04-compatible I/O slaves and analog slaves:
• Count the number of connected slaves.
AS-i Ver. 2.11-compatible I/O slaves:
• When the slaves in group A and B use the same slave address, count the slaves
of the same slave address as 1.
• When the slaves in group A and B use different slave addresses, count the
number of connected slaves.
Example) When slaves are connected as shown below
AS-i Ver. 2.04
-compatible
I/O slaves
1
Connected
slave address
1 slave
search engine
of channels)
Analog slaves
2 3 4
1 slave 1 slave 1 slave
Number of communicating slaves = 8 slaves in all
Calculated Calculated
as in (1) as in (2)
MELSEC-Q
AS-i Ver. 2.11
-compatible
I/O slaves
11A 12A 14A
12B 13B 14B
1 slave 1 slave 1 slave 1 slave
Calculated
as in (3)
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