13 SPM
13.1 General information
The memory accessible to the user is the SPM (Scratch Pad Memory). This memory is used
to store lots of internal data from which weights, statuses and reports can be read and
control data can be written.
- System data are dened by the rmware and the respective application.
- The free user range can be used freely by conguring the logical links, for example.
The SPM table can be accessed via OPC, eldbus and ModBus communication. In
addition, individual bits are copied back and forth between digital inputs and outputs and
the SPM via the I/O conguration.
13.2 Elementary data types
The elementary data types are characterized by their bit width and possible value range.
Type of data Description Value range
BOOL bool 0 (FALSE) or 1 (TRUE)
SINT short integer -128 to 127
INT integer -32768 to 32767
DINT double integer -231 to 231-1
USINT unsigned short integer 0 to 255
UINT unsigned integer 0 to 65535
UDINT unsigned double integer 0 to 232-1
REAL real number ±1.18E-38 to 3.4E38 (with
about 7 signicant digits)
TIME time duration 1 ms to ±247 ms
DATE date (only) 1.1.1900 to 31.12.2099
TIME_OF_DAY time of day (only) 00:00:00.00 to 23:59:59.99
DATE_AND_TIME Date and time of day see DATE and TIME_OF_DAY
STRING variable-long character
string
max. 255 characters (ISO)
WSTRING variable-long wide cha-
racter string
max. 255 characters (Unicode)
BYTE bit-sequence 8 …
WORD bit-sequence 16 …
DWORD bit-sequence 32 …
LWORD bit-sequence 64 …
13 SPM Transmitter in eld housing PR 5230
EN-277 Minebea Intec