User Configurations - Siemens Sinumerik 840D sl Function Manual

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Table of Contents

Connecting Sensors/Actuators

7.5 Safe programmable logic (SPL)

User configurations

In order to provide users (machinery construction OEMs, SPL programmers), the

option of being able to save various machine configurations in a protected way

(e.g. regarding the I/O structure or the number of safety--related axes), data are

defined in the NCK (MD) and PLC (DB18) in which users can save such informa-

tion. These data can be interrogated in order to execute different SPL instructions

e.g. corresponding to the meaning.

These data have no function for the NCK and PLC (they are not interpreted any

further by the NCK and PLC).

In this case, for the NCK, a general machine data field applies

MD13312 $MN_SAFE_SPL_USER_DATA[0...3]

Users can save information in this MD that must be set the same as the corre-

sponding data in DDB18(DBD256, 260, 264, 268), e.g.

MD13312[0] $MN_SAFE_SPL_USER_DATA[0]

DB18.DBD256 SPL_USER_DATA[0]

MD13312[1] $MN_SAFE_SPL_USER_DATA[1]

DB18.DBD260 SPL_USER_DATA[1]

MD13312[2] $MN_SAFE_SPL_USER_DATA[2]

DB18.DBD264 SPL_USER_DATA[2]

MD13312[3] $MN_SAFE_SPL_USER_DATA[3]

DB18.DBD268 SPL_USER_DATA[3]

Figure 7-33 Assignment between MD13312 and data block DB18

Differences between the NCK and PLC data are identified using the SPL--CDC and

result, corresponding to the parameterized stop response, in a STOP D/E on all

safety--related axes. Alarm 27090 "Error for crosswise Data comparison NCK--

PLC" is output with a reference to the machine data.

Further, system variable $A_STATSID, bit 27 = 1 is used to indicate to the SPL

user that there is an SPL--CDC error.

Changes to machine data or DB18 data only become effective after power on.

Changes to data are indicated using a corresponding alarm after restart.

SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition

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