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4.4.2.Driver Related Map Descriptor Parameters
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Title |
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| One | of | the | Node | |
Node_Name | Name of Node to fetch data from |
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| Descriptor” above | ||||
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| Discrete Inputs (%I) | ||||
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| Discrete Outputs (%Q) | ||||
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| Discrete | Temporaries | |||
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| (%T) |
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| Discrete | Internals | |||
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| (%M) |
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| Genius | Global | Data | ||
Data_Type |
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| Analog Inputs (%AI) | ||||||||
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| Analog | Outputs | ||||
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| (%AQ) |
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| Registers (%R) |
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| %SA Discrete |
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| %SB Discrete |
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| %SC Discrete |
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| %S Discrete (%S) | ||||
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Length |
| Length of Map Descriptor. Ensure that the |
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| length does not exceed the table in the PLC |
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| Starting address of read block / write block. The | 1 , 2 , 3 |
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Address |
| 1st element of each Data type Table is referred |
| Positive |
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| to as address one. |
| numbers |
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| Use to override the default format for obtaining |
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| data. Bit tables are by default read by reading |
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| whole bytes at a time (If the Length is 10 then |
| Bit, Byte |
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| 10 bytes of data are read and placed in 10 Data |
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Format* | Array locations) |
| The | format for | %AI, | ||||
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| %AQ and %R cannot | ||||
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| If you wish to read bits instead then use this |
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| parameter. (If the Length is 10 then 10 bits are |
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| read and each bit is stored in its own location.) |
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| This parameter is only specified when you |
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| create a write Map Descriptor to change the |
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GE_Func* |
| privilege level. |
| CPL, RW |
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| If it is not specified the driver assumes the |
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| default (RW – Read/Write). |
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4.4.3.Timing Parameters
Column Title | Function | Legal Values |
Scan_Interval | Rate at which data is polled | ≥0.1s |
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