Description; Block Specification - Siemens SIMATIC Ident Function Manual

Description

2.1

Block specification

Block number:
Block name:
Symbolic name:
Family:
Work memory requirement:
Local data:
Version:
Called blocks:
Data block resources:
Bit memories used:
Counters used:
Registers used:
Call:
Note
A calculation tool for calculating the data throughput is available for various communications
modules. You will find this on the DVD "RFID Systems, Software & Documentation" (order
number: 6GT2080-2AA20).
RFID data throughput calculation
The data throughput with FB 45 can be calculated according to the formulas in the relevant
RFID system manual.
A configuration manual is provided for each RFID system.
The following applies in general:
FB 45 for MOBY U, MOBY D, RF200, RF300
Function Manual, 07/2012, J31069-D0166-U001-A4-7618
t = + k t ⋅ n
k bytes
FB 45
FB 45
"MOBY FB"
–
8256 bytes
100 bytes
1.6
SFB 52, SFB 53, SFC 20, SFC 21, SFC 1
MOBY Param = 50 bytes per channel
(defined via UDT 10)
Instance DB for FB 45 = 464 bytes per channel
None
None
AR1, AR2
cyclic
t k Communication time between CM, reader and tag
n
Amount of user data
k
Constants (see table in configuration manual)
t
Transmission time for 1 byte (see table in configuration
bytes
manual)
2
11