Chapter 3
MMS and Your Coprocessor
3-6
The MMS specification lists a set of data types, or formats, that your
variables are allowed to take. The data types allowed for your OSI
coprocessor are:
boolean
bitstring
integer
unsigned
integer
BCD
floating
point
visible
string
octet
string
generalized
time
structure
array
These data types directly correspond to areas in PLC controller memory
that contain data tables. These data tables store information, in different
data–type categories, that your application programs can access. The
following list shows the PLC–5 controller’s data tables you are allowed to
access through your applications:
ASCII
(A)
Binary
(B)
Signed
Word
(N)
Floating Point (F)
Timer
(T)
Counter
(C)
Input Image (I)
Output Image (O)
Block Transfer Data (BT)
Control
(R)
Status
(S)
String
(ST)
PID Control (PD)
Message Control (MG)
BCD Data (D)
Sequential Function Chart (SC)
Token Data (TD)
Important: Refer to your PLC–5 Programming Reference Manual for
descriptions of data type structures. See Appendix A of this manual for
more information on mapping MMS data types onto PLC–5 data files.
Mapping MMS Data Types
onto PLC-5 Controller Data
Files
Summary of Contents for PLC-5 MAP/OSI
Page 1: ...PLC 5 MAP OSI Software User Manual Cat No 1785 OSI AB Parts...
Page 4: ...Table of Contents iii OSI Layer Management E 1...
Page 57: ...Chapter 4 Basic Programming Techniques 4 7 For example B7 6 10 AB Parts...
Page 91: ...Mapping MMS Data Types onto PLC 5 40 5 60 File Types Appendix A A 2 T ACC D 16 AB Parts...