Plc Machine Data; Plc Key Data - Siemens SINUMERIK 828D Function Manual

P4: PLC for SINUMERIK 828D
14.1 Overview
14.1.2.5

PLC machine data

The PLC machine data are in the NCK machine data area. At POWER ON, this data is transferred by the PLC
firmware into DB4500 of the PLC user interface where it can be evaluated by the PLC user program.
References
SINUMERIK 828D Parameter Manual
14.1.3

PLC key data

The integrated PLC has a program memory of 24000 PLC operations, which are completely executed in one
fixed PLC cycle.
A maximum of 500 operations can be executed in the INT0 interrupt program that can be optionally used. It is
executed servo-synchronous and allows the fastest possible reaction to process events. This is the reason that
interrupt-capable PLC I/O modules are not required.
Data
Main program (MAIN)
Subprograms (SBRx)
Interrupts
Time controlled interrupt
Alarms/messages
Bit memory
Counter
Timers,
of which:
10 ms increment interval
100 ms increment interval
User data block each with a max. of
512 bytes
Data transmission NCK ↔ PLC
1090
Number Special features
1
256
2
1 Servo-synchronous interrupt program
248
4096 Non-retentive
64 Non-retentive
128 Non-retentive
112
16
64 Address range DB9000 to DB9063
Via fixed parameterizable interface
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions