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5 - 12 PANELWARE MMI Application Manual for GE Fanuc Genius Protocol - June 1995 GFK-1115
5
Data Type Conversions
The following basic Panel and PLC data types are supported:
Table 5 - 3. Variable Data Types
Format in the PCS
Panel Data Type PLC Data Type Value Range
Bit BIT 0 ... 1
Byte unsigned (does not exist) 0 ... + 255
Word unsigned WORD 0 ... + 65535
Word signed INT - 32768 ... + 32767
Long unsigned DWORD 0 ... + 4294967295
Long signed DINT - 2147483648 ... + 2147483647
Float FLOAT
± 1.401298 × 10
-45
...
±
3.402823 × 10
+38*
String STRING Byte field (character string)
* A maximum of 7 digits of significance (precision).
The PLC and Panel data types can sometimes differ while reading from the PLC or writing to the
PLC. When this happens, a data type conversion is performed automatically as shown in Table 5-
4.