Interfaces In The Plc User Program - Siemens SINUMERIK 828D Commissioning Manual

7.1

Interfaces in the PLC user program

PLC user program
The PLC user program operates the user interface. This includes, in particular, the bit
interfaces of the DB1800 and the evaluation of the remaining time in DB9904. You must ensure
that appropriate messages are displayed for the warnings and alarms.
During the configuration of these messages, so-called alarm responses can be selected, e.g.
the machine is "disabled" after a Power OFF message.
The alarm messages are configured after specification of the SINUMERIK 828D PLC
messages. The texts are entered with the alarm text editor. Then the texts are available for
the operating software:
● Evaluation of the alarm data and actual data with the aim of generating PLC warnings and
PLC alarms. Additional signals can be included in the evaluation logic.
● Optional linking of the deactivation bits with bit memory or I/O signals.
Note
A sample program is supplied in the PLC function library. This can be adapted by machine
manufacturers to meet their requirements.
Interfaces to the PLC
The following data areas are available in the user interface:
Data block
DB9903
DB9904
DB1800.DBB2000
DB1800.DBB3000
DB1800.DBB4000
DB1800.DBB5000
DB9903: Initial data
DB9903
Byte
DBW0
DBW2
DBW4
DBW6
DBW8
DBW10
DBW12
CNC commissioning
Commissioning Manual, 10/2015, 6FC5397-3DP40-5BA3
Meaning
Initial data
Actual data
Deactivate tasks
Alarms
Acknowledgments
Acknowledgment block
Initial data table [r16]
Bit 7 Bit 6 Bit 5
Interval 1 [h]
Time of first warning 1 [h]
Number of warnings to be output 1
Reserved 1
Interval 2 [h]
Time of first warning 2 [h]
Number of warnings to be output 2
7.1 Interfaces in the PLC user program
Bit 4 Bit 3 Bit 2
Service Planner
Bit 1 Bit 0
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