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.
The SPM table can be accessed via OPC and ModBus communication. In addition,
individual bits are copied back and forth between digital inputs and outputs and the SPM
via the I/O configuration.
Note:
If a text is defined e.g. from SPM address B401, this must be defined in the OPC server
from SPM address B400 so that the content actually begins at B401.
13.2 Elementary data types
The elementary data types are characterized by their bit width and possible value range.
All commands of the BOOL data type are executed with a rising edge.
Data type
Description
Value range
BOOL
bool
0 (FALSE) or 1 (TRUE)
SINT
short integer
-128 to 127
INT
integer
-32.768 to 32767
DINT
double integer
-2
31
to 2
31
-1
LINT
long integer
-2
63
to 2
63
-1
USINT
unsigned short integer
0 to 255
UINT
unsigned integer
0 to 65535
UDINT
unsigned double integer
0 to 2
32
-1
ULINT
unsigned long integer
0 to 2
64
-1
REAL
real number
±1.18E-38 to 3.4E38 (with
about 7 significant digits)
LREAL
long real number
±1.18E-308 to 3.4E308 (with
approx. 16 significant digits)
TIME
time duration
1 ms to ±2
47
ms
DATE
date (only)
1/1/1900 to 12/31/2099
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)
X3 Process Indicator PR 5410
13 SPM
Minebea Intec
EN-314
