Mitsubishi Electric Q80BD-J71BR11, Руководство пользователя

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MELSEC
12 APPLICATION FUNCTIONS
(4) Calculation of transmission delay time
The processing time of the transient transmission instruction to access a station
on other network in a multiple network system can be obtained by adding the
following transmission delay factors.
(Routing transmission delay time) = (processing time from request source to relay station)
+ (processing time from relay station to request destination)
(a) Processing time from request source to relay station
This is the transmission delay time from the request source (the station that
executed the instruction) to the relay station that performs the routing. In the
following example, it is the time required for the data to be transmitted from
station 1M
P
1 to station 1N
S
3.
Refer to "Q Corresponding MELSECNET/H Network System Reference Manual
(PLC to PLC network)" for the calculation of translation of delay time.
(b) Processing time from relay station to request destination
This is the transmission delay time from the relay station to the request
destination (the station accessed with the instruction). In the following example,
it is the time required for the data to be transmitted from station 2M
P
1 to station
2N
S
3.
Refer to "Q Corresponding MELSECNET/H Network System Reference Manual
(PLC to PLC network)" for the calculation of translation of delay time.
1N
S
3 2M
P
1
Network No. 1 Network No. 2
1M
P
1 1M
P
2 2N
S
2 2N
S
3
READ
request
source
READ
request
destination
READ completion READ execution
PC processing time
of request source
Link scan on request
source side
Link scan on request
destination side
Sequence scan of
request destination side
REMARK
When three or more networks are relayed through by means of routing, add the
processing time from one relay station to the other relay station to the routing
transmission delay time.