10. SPM | 169
10 SPM
10.1 General notes
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.
The SPM table can be accessed via ModBus communication and fieldbus with
SPM interface.
In addition, individual bits are copied back and forth between digital inputs
and outputs and the SPM via the I/O configuration.
10.2 Elementary data types
The elementary data types are characterized by their bit width and possible
value range.
Data type Description Value range
BOOL bool 0 (FALSE) or 1 (TRUE)
SINT short integer -128 to 127
INT integer -32768 to 32767
DINT double integer -2
31
to 2
31
-1
LINT long integer -2
63
to 2
63
-1
UINT unsigned short inte
ger
0 to 255
UINT unsigned integer 0 to 65535
UDINT unsigned double inte
ger
0 to 2
32
-1
ULINT unsigned long integer 0 to 2
64
-1
REAL real number ±1.18E-38 to 3.4E38 (with ap
prox.7significant digits)
LREAL long real number ±1.18E-308 to 3.4E308 (with
approx.16significant digits)
TIME time duration 1 ms to ±2
47
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
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