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4
FUNCTIONS
[Receiving output data from the master station]
Master
station side
*1
I/O communication signal (X01)
QJ71PB93D
Output receive area
side
(Buffer memory address:
0
to BF
)
H
H
[Sending input data to the master station]
Master station
*1
side
Bus cycle time (Bc)
I/O communication signal (X01)
Input send area
QJ71PB93D
refresh directive signal (Y00)
side
Input send area
(Buffer memory address:
100
to 1BF
H
4 - 3
(e) The I/O communication signal of the QJ71PB93D is turn off when
communication with the master station is stopped.
Output area
Bus cycle time (Bc)
Turned on when communication
with master station is ready.
Previous data
Input area
Turned on when communication
with master station is ready.
Input send data
*2
refresh start
)
H
1: For the bus cycle time calculation formula, refer to the manual for the PROFIBUS-DP
module used as the master station.
2: Y00 must be turned on after X01 turns on and data are stored in the input send area.
3: Hold the data for more than 1 bus cycle time.
If the data are held for the time less than 1 bus cycle time, they may not be sent.
4: Transmission delay equal to 1 bus cycle time occurs to read the data in the output receive
area after X01 turns on.
Transmission delay equal to a maximum of 1 bus cycle time occurs to store data in the
input receive area after X01 turns on.
Data
Data
1
2
Bc 1)
Bc 2)
Data
1
*4
Input data
at Bc 1)
(Data
1
)
Bc 1)
Bc 2)
Data
Data
1
2
*3
Data
Data
3
4
Bc 3)
Bc 4)
Turned off when communication
with master station is disabled.
Data
Data
2
4
Input data
Input data
at Bc 2)
at Bc 3)
(Data
)
(Data
)
2
4
Bc 3)
Bc 4)
Input send data
refresh stop
*3
Data
Data
3
4
MELSEC-Q
4 - 3
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