Data Guarantee Of Cyclic Data At The Time Of Communication Between Master And Local Stations - Mitsubishi Electric M800VW Series Programming Manual

M800V/M80V Series PLC Programming Manual (2/2)
16 External PLC link
16.1 CC-Link
(3) When changing CC-Link system configuration, always confirm that the parameters of all the NCs connected with CC-Link
is within the range.
(Example) When the number of occupied stations is set to 30 per system in CC-Link Ver.1 mode
 Actual number of remote input/output points (Number of actually linked points): Occupied number of stations (30) × 32
= 960 points
 When RX and RY are allocated at the end of M device as the figure below, set the parameters as follows.
Parameter
#24014+40(n-1) RX dev name
#24015+40(n-1) RX dev No.
#24016+40(n-1) RY dev name
#24017+40(n-1) RY dev No.
"n" indicates the channel number (1 or 2)
Device area other than
M device area
Device area other than
Make sure not to overlap with the device area other than M.
16.1.3.5 Data Guarantee of Cyclic Data at the Time of Communication Between Master
and Local Stations
Cyclic data may be separated into new data and old data, depending on the auto refresh timing. When the data guarantee of
cyclic data (RWr/RWw) per station is necessary, it is guaranteed by applying an interlock in the remote input/output (RX/RY).
As illustrated below, apply an interlock in the remote input/output (RX/RY).
Transmitting station (Master station)
(1)
M0 Y400 X400
X400
(1) The send/receive command (M0) turns ON.
(2) Data of D0 to D3 are stored in W100 to W103 (RWw0 to Rww3).
(3) Upon completion of storage in W100 to W103, Y400 (RY0) for handshake turns ON.
(4) By cyclic transmission, remote output (RY) data are sent following the remote register (RWw) data, and then the receiving
station's X400 (RX0) is turned ON.
(5) Data of W0 to W3 (RWr0 to RWr3) are stored in D100 to D103.
(6) Upon completion of storage in D100 to D103, Y400 (RY0) for handshake turns ON.
(7) When the data reach the receiving station, Y400 is turned OFF.
IB-1501668-B
M
59520
(M60479 - Number of actually linked points (960) + 1)
M
60480
(M61439 - Number of actually linked points (960) + 1)
M device
RX
RY
M device
(2)
BMOV D0 W100 K4
(3)
SET Y400
(7)
RST Y400
Setting
M0
M59520
960 points
M60479
M60480
960 points
M61439
(End of M device)
Receiving station (Local station)
(1) (4)
(5)
M0 X400
BMOV W0 D100 K4
X400
924
(6)
SET Y400
RST Y400