Siemens SINUMERIK 840D sl Function Manual

Detailed description
2.2 Functions
Basic logic functions: Various NC/PLC interface signals and functions (A2)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
37
• Reading in part program
Program code (extract) Comment
. . .
PLCDATA = $A_DBW[4];
// Read a word
. . .
Behavior during POWER ON, block search
The DPR communications buffer is initialized during "POWER ON".
During a "block search", the PLC variable outputs are collected and transferred to the DPR
communications buffer with the approach block (analogous to writing of analog and digital
outputs).
Other status transitions have no effect in this respect.
2.2.5 Access protection via password and keyswitch
2.2.5.1 Access protection via password and keyswitch
Access authorization
Access to functions, programs and data is useroriented and controlled via 8 hierarchical
protection levels. These are subdivided into:
• Password levels for Siemens, machine manufacturer and end user
• Keyswitch positions for end user

Siemens SINUMERIK 840D sl Specifications

General

Control Type	CNC
Number of Axes	Up to 31
Max Number of Channels	10
Interfaces	Ethernet, PROFIBUS, PROFINET, USB
Interpolation	5-axis interpolation
Operating Temperature	0°C to 45°C
Relative Humidity	Up to 95% (non-condensing)
Display	TFT color display, various sizes
Programming Languages	DIN/ISO
Safety Features	Safety Integrated
PLC	Integrated PLC S7-300
Drive Interface	SINAMICS S120
Data Storage	CF card, USB
Operating System	Windows-based