Mitsubishi Electric MELSEC QS Series User Manual page 59

5
DATA LINK PROCESSING TIME AND STATION
STATUS AT ERROR OCCURRENCE
(Example) When the transmission rate is 10Mbps and the scan mode is Synchronous
Station No.1
(1 occupied
Safety
master
station
ST : Constant (For Asynchronous mode only. For Synchronous mode, ST = 0)
(1) or 2), whichever is greater. Ignore 2) when B = 0.)
1) 800 + (A 15)
2) 900 + (B 50)
RT : Retry processing time (only when a faulty station is detected)
+ (No. of detected faulty stations - 1)
: Retry-and-return processing time for 1
BT
R: 51.6 + (NI
: Retry-and-return processing time for 2
BT
P: 10.8
F : Return processing time (only when a faulty station exists)
BT
mode in the following system configuration (assuming that there is no faulty
station.)
Station No.2
(1 occupied
station) station)
Standard
Safety
remote
remote
I/O station I/O station
BT =0.8
NI =9 16
NW =9 16
N =4
ni =7
nw =6
TA =38.4
LS =0.8 {27+(16 4.8)+(16 9.6)+(4 30)+(7 4.8)+(6 9.6)+38.4}
=405.6[ s]
=0.41[ms]
5.1 Link Scan Time
[(200+R) x Preset No. of retries + 200]
4.8) + (NW
[(200+P) Preset No. of retries + 200]
218 No. of auto-return modules
Station No.3
Station No.5
(2 occupied
(4 occupied
stations)
stations)
Remote
Reserved
device station
station
a=1, b=6
st
module
9.6)
nd
or subsequent module
Station No.9
(1 occupied
station)
Safety remote
I/O station
5
1
2
3
4
5
6
7
8
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