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1 General Overview
01.93
1.3.2 Loading PLC machine data
1.3.2
Loading PLC machine data
As far as the machine data are concerned, a distinction is made between MD words and MD
bits. The PLC machine data are also broken down according to target groups; PLC machine
data words and bits exist, for example, for the PLC operating system, function blocks and the
PLC user program.
The PLC machine data are stored together with the NC machine data in the machine data
submodule (COM area). Each PLC has its own machine data. The machine data can be
entered at the operator panel or read in via the universal interfaces.
When a PLC cold restart is performed, the PLC machine data are transferred to the relevant
data blocks of the PLC and thus made available to the user program.
Loading PLC machine data on cold restart
PLC operating system
Function blocks
User
PLC operating system
Function blocks
User
a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a
MD words
1)
MD bits
1)
Machine data words
a a a a a
a a a a a
a a a a a
a a a a a
159
a a a a
a a a a
a a a a
a a a a
149
a a a a
a a a a
a a a a
a a a a
49
a a
a a
a a
a a
a a
0
a a
a a
a a
a a
a a
0
a a
a a
a a
a a
a a
0
a a a a
a a a a
a a a a
a a a a
a a a a
49
a a a a
a a a a
a a a a
a a a a
a a a a
39
a a a a
a a a a
a a a a
a a a a
a a a a
24
a a a a a a a a
a a a a a a a a
a a a a a a a a
a a a a a a a a
DB 63
a a a a a a a a a
a a a a a a a a a
a a a a a a a a a
a a a a a a a a a
DB 64
a a a a a a a a
a a a a a a a a
a a a a a a a a
a a a a a a a a
DB 65
a a a a a a a a
a a a a a a a a
a a a a a a a a
a a a a a a a a
DB 62
a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a
Cold restart
a a a
a a a
a a a
a a a
0
Machine data bits
a a a a a a a a a
a a a a a a a a a
a a a a a a a a a
a a a a a a a a a
a a a a a a a a a
DB 60
a a a a a a a a a
a a a a a a a a a
a a a a a a a a a
a a a a a a a a a
a a a a a a a a a
DB 61
a a
a a
a a
a a
0
a a
a a
a a
a a
0
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
Function
blocks
a a a a a a a a a a a
a a a a a a a a a a a
a a a a a a a a a a a
a a a a a a a a a a a
a a a a a a a a a a a
a a a a a a a a a a a
a a a a a a a a a a a
a a a a a a a a a a a
User
a a a a a a a a a a a
a a a a a a a a a a a
a a a a a a a a a a a
a a a a a a a a a a a
a a a a a a a a a a a
a a a a a a a a a a a
a a a a a a a a a a a
User
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
Function
blocks
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
Operat-
ing
system
a a a a a a a
a a a a a a a
a a a a a a a
a a a a a a a
COM
a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a
PLC I (PLC II)
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
Operat-
ing
system
a a a a a a a a a a a
a a a a a a a a a a a
a a a a a a a a a a a
a a a a a a a a a a a
a a a a a a a a a a a
a a a a a a a a a a a
a a a a a a a a a a a
MD 0
(MD 200)
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
MD 2000
(MD 2250)
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
MD 4000
(MD 4100)
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
MD 6000
(MD 6100)
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
MD 7000
(MD 7250)
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
a a a a a a a a a a a a
MD 8000
(MD 8050)
–––––––
1)
The machine data contain the MDs for both PLCs; they are transferred to the relevant PLC when a cold
restart is performed.
1–20
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SINUMERIK 880 (PJ)