97
Allocated CIO Area Words
Section 4-2
4-2-9 Slave New Diagnostics Flags (Word n+17 to Word n+24)
The Slave New Diagnostics flags indicate for each slave station if it sent a
new diagnostics message to the PROFIBUS-DP Master Unit, since the last
time it was read or cleared by the CS/CJ-series PLC. The flags are allocated
to a block of eight CIO words, and each bit in the block corresponds to a sta-
tion address.
Word n+17 to n+24 [n = CIO 1,500 + (25 x unit number)]
1514131211109876543210
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Word n+17
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Word n+18
47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
Word n+19
63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48
Word n+20
79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64
Word n+21
95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80
Word n+22
111 110 109 108 107 106 105 104 103 102 101 100 99 98 97 96
Word n+23
125 124 123 122 121 120 119 118 117 116 115 114 113 112
Word n+24
Slave station 00 ~ 15
Slave station 16 ~ 31
Slave station 32 ~ 47
Slave station 48 ~ 63
Slave station 64 ~ 79
Slave station 80 ~ 95
Slave station 96 ~ 111
Slave station 112 ~ 125
Bit Name Status Controlled
by
Unit operation
– Slave New Diag-
nostics flags
ON Unit If the bit corresponding to a slave station address is ON, it indicates that
this slave station
• is allocated to the PROFIBUS-DP Master Unit, and
• has sent new diagnostics message to the PROFIBUS-DP Master
Unit.
In this case, the PROFIBUS-DP Master Unit must be in CLEAR mode
or OPERATE mode.
OFF Unit If the bit corresponding to a slave station address is OFF, it indicates
that
• the slave station has not sent a new diagnostics message to the
PROFIBUS-DP Master Unit, since the last time it was read or cleared,
or
• the slave station has not been allocated to this PROFIBUS-DP Master
Unit, or
• the PROFIBUS-DP Master Unit is not in CLEAR or OPERATE mode
Note In case an allocated slave station is not responding, and there-
fore not sending a diagnostics message, the PROFIBUS-DP
Master Unit itself will provide a diagnostics message to the PLC
CPU containing the mandatory first 6 bytes. This diagnostics
message will then indicate that the slave is not responding.
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