Symbolic Programming Of User Program With Interface Db - Siemens SINUMERIK 840D sl Function Manual

P3: Basic PLC program for SINUMERIK 840D sl
13.10 Structure and functions of the basic program
bit mantissa and 8-bit exponent) and vice versa]. A loss of accuracy results from the conversion
from 64-bit to 32-bit REAL. The maximum precision of 32-bit REAL numbers is approximately
10 to the power of 7.
AG_SEND/AG_RECV functions
The AG_SEND/AG_RECV functions correspond to the functions of the library
"SIMATIC_NET_CP" of the S7-300 CPU in STEP 7. In general, the online help is valid for these
functions.
The AG_SEND/AG_RECV functions can be used for data exchange with another station via
the integrated "CP 840D sl". A description of the functions is provided in Chapter "Block
descriptions (Page 914)".
Note
Other communication blocks (e.g. BSEND, USEND) which possess a CP343-1 are not
supported in SINUMERIK 840D sl.
13.10.8

Symbolic programming of user program with interface DB

General
Note
The basic program library on the CD supplied with the Toolbox for the 840D contains files
NST_UDTB.AWL and TM_UDTB.AWL.
The compiled UDT blocks from these two files are stored in the CPU program of the basic
program.
A UDT is a data type defined by the user that can, for example, be assigned to a data block
generated in the CPU.
Symbolic names of virtually all the interface signals are defined in these UDT blocks.
The UDT numbers 2, 10, 11, 19, 21, 31, 71, 72, 73, 77, 1002, 1071, 1072, 1073 are used.
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Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions