Mitsubishi Electric Melsec Q Series User Manual page 71

3
SPECIFICATIONS
(1) Slave status area (Normal communication detection) (Un\G23040 to
Un\G23047)
The communication status of each DP-Slave is stored in this area. (Initial value:
0000
When the Data exchange start request signal (Y00) is turned OFF, all the information
of the Slave status area (Normal communication detection) (Un\G23040 to
Un\G23047) is cleared.
0: I/O data communication error, or no communication (including reserved, temporary
slave reservation and/or not-configured stations)
1: Exchanging I/O data
Address
b15 b14 b13 b12 b11 b10 b9 b8 b7
DEC (HEX)
23040(5A00 )
16 15
H
23041(5A01 )
32 31
H
23042(5A02 ) 48 47
H
23043(5A03 ) 64 63
H
23044(5A04 ) 80 79
H
23045(5A05 ) 96 95
H
112 111
23046(5A06 )
H
1
23047(5A07 )
H
1 Bits b15 to b13 of address 23047 (5A07
Figure 3.14 Slave Status Area (Normal communication detection) (Un\G23040 to Un\G23047)
Turning ON the Data exchange start request signal (Y00) updates the information in
the Slave status area (Normal communication detection) (Un\G23040 to Un\G23047),
turning ON (1) the bits of the DP-Slave currently exchanging I/O data.
Figure 3.15 Operation in Slave Status Area (Normal communication detection) (When I/O data exchange
When an I/O data communication error occurs on a DP-Slave, the corresponding bit
turns OFF (0), and it turns ON (1) again when normal status is restored.
Data exchange start
request signal
Slave status area
(Normal communication detection)
Figure 3.16 Operation in Slave Status Area (Normal communication detection) (When I/O data exchange
)
H
14 13 12 11 10 9
30 29 28 27 26 25
46 45 44 43 42 41
62 61 60 59 58 57
78 77 76 75 74 73
94 93 92 91 90 89
110 109 108 107 106 105 104
1 1 125 124 123 122 121 120
OFF
Data exchange start
(Y00)
request signal
OFF
Slave status area
(Normal communication detection)
OFF
(Y00)
OFF
I/O data exchange
error occurred
3.4 Buffer Memory
3.4.5 Slave status area
b6 b5 b4 b3 b2 b1 b0
8 7 6 5 4 3 2
24 23 22 21 20 19 18
40 39 38 37 36 35 34
56 55 54 53 52 51 50
72 71 70 69 68 67 66
88 87 86 85 84 83 82
103 102 101 100 99 98
119 118 117 116 115 114
) are fixed to 0.
H
ON
ON
is normal)
ON
ON
error occurred)
Each bit indicates
1
the n-th DP-Slave.
17
33
49
65
81
97
113
Restored from I/O
data exchange error
3
1
2
3
4
5
6
7
8
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