Mitsubishi Electric MELSEC iQ-F FX55-ASL-M, User Manual

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APPX
Appendix 4 Buffer Memory
77
A
Output information area
When the on/off data of an output signal of a slave module is written from the CPU module, the slave module automatically
outputs a signal.
■
Output information area (Un\G4096 to Un\G4111)
Ex.
If a 2-point output slave module (address 30) is connected, the 2 bits from Un\G4097.E are occupied for the output signal
because the setting address is 30. (b14 and b15 of Un\G4097 turn on or off.)
Number of the error IDs
■
Number of the error IDs (Un\G8192)
This buffer memory area stores the number of error IDs that send no response due to disconnection of the transmission cable
(DP, DN) or a failure in the slave module alone among the IDs of the connected modules. (Up to 128 IDs)
The stored values are retained until the power is turned off and on or 'Error flag clear command' (Un\G27 b0) is turned off and
on after the error is cleared.
However, if the error status automatic recovery function is enabled, the number of slave modules (number of error IDs) from
which errors are cleared automatically decreases.
Error ID information storage area
■ Error ID information storage area (Un\G8193 to Un\G8320)
When the transmission cables (DP, DN) are disconnected or an error in a slave module or an error (error code: 0CCAH,
0D30H) occurs, this buffer memory area stores all the error IDs in the ascending order. (Up to 128 IDs)
The IDs to be stored are as follows.
• 0000H to 00FFH: ID of an output slave module
• 0200H to 02FFH: ID of an input slave module or I/O combined slave module
The stored values are retained until the power is turned off and on or 'Error flag clear command' (Un\G27 b0) is turned off and
on after the error is cleared.
However, if the error status automatic recovery function is enabled, the ID of a slave module from which an error is cleared
turns off automatically.
Address b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
Un\G4096 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Un\G4097 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Un\G4098 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
Un\G4099 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48
Un\G4100 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64
Un\G4101 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80
Un\G4102 111 110 109 108 107 106 105 104 103 102 101 100 99 98 97 96
Un\G4103 127 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112
Un\G4104 143 142 141 140 139 138 137 136 135 134 133 132 131 130 129 128
Un\G4105 159 158 157 156 155 154 153 152 151 150 149 148 147 146 145 144
Un\G4106 175 174 173 172 171 170 169 168 167 166 165 164 163 162 161 160
Un\G4107 191 190 189 188 187 186 185 184 183 182 181 180 179 178 177 176
Un\G4108 207 206 205 204 203 202 201 200 199 198 197 196 195 194 193 192
Un\G4109 223 222 221 220 219 218 217 216 215 214 213 212 211 210 209 208
Un\G4110 239 238 237 236 235 234 233 232 231 230 229 228 227 226 225 224
Un\G4111 255 254 253 252 251 250 249 248 247 246 245 244 243 242 241 240
Data update timing
After automatic address detection, the data are updated as soon as a response error is detected.
Data update timing
After automatic address detection, the data are updated as soon as a response error is detected.