Справочник Пользователя для Siemens 500 NIM

 

Primitive Examples

Primitive Examples

The following TIWAY I Primitive example (which does not include any
program transfer capabilities) reads four words of variable memory from a
Series 500 controller, starting at memory location 100 (hex = 64). The
format for the request would be as follows:

Request:  LLLL 20 TT NNNN AAAA = 0006 20 01 0004 0064, where:

LLLL (Length)  = 0006 
Primitive Code = 20 
TT (Data Type) = 01 (V, variable memory) 
NNNN (Number of locations)  = 0004 
AAAA (Address, data element location) = 0064

Response: LLLL 20 HH DDDD DDDD = 000A 20 00 8464 8665 A001 01F4 

LLLL (Length)   = 000A 
Primitive Code = 20 
HH (Status) = 00 (unit operational and executing logic) 
DDDD ... (values read from V-memory) 

V0100 = 8464



 

V0101 = 8665



V0102 = A001



V0103 = 01F4



In this example, the same task is performed as in the above example, but
with extended addressing.

Command:  LLLL A0 TT NNNN AAAA AAAA = 0008 A0 01 0004 0000
0064, where:

LLLL (Length)  = 0008 
Primitive Code = A0 (extended address format for Primitive 20) 
TT (Data Type) = 01 (V, variable memory) 
NNNN (Number of locations)  = 0004 
AAAA AAAA (Address) = 0000 0064