Switching Time From The Multiplexed Remote Master Station To The Multiplexed Remote Sub-Master Station In A Multiplexed Remote I/O Network - Mitsubishi Electric QJ71LP21 Reference Manual

3 SPECIFICATIONS
3.3.3 Switching time from the multiplexed remote master station to the multiplexed remote
sub-master station in a multiplexed remote I/O network
[Switching time from the multiplexed remote master station to the multiplexed
remote sub-master station (Ds2)]
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In the multiplexed remote I/O network system, the multiplexed remote sub-master
station takes over the control of the remote I/O station from of the multiplexed remote
master station when it develops an error.
While control is switched from the multiplexed remote master station to the multiplexed
remote sub-master station, the remote station holds output (data).
The switching time from the multiplexed remote master station to the multiplexed
remote sub-master station is expressed with the formula below:
An error has occurred on the multiplexed remote master station
K1
Network
Multiplexed remote
sub-master station
Switching time
Ds2 = K1 + Cs + Cm [ms]
K1: Internal processing time
• When a power failure or CPU module stop error occurs: 620ms
• When a system switching is caused by the followings, execution of system
switching instruction, system switching request by GX Developer or link cable
disconnection on other network module: 160ms
Cs: Normal station baton passing/cyclic communication initializing time
= Number of normal stations
Cm: Error station baton passing/cyclic communication initializing time
= Number of error stations
(only if any error station is found)
Cs
Cm K2
Ds2
9 [ms]
16 [ms]
MELSEC-Q
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