4 Data Descriptions
11.03
4.2 Machine data for SIMODRIVE 611 digital
© Siemens AG 2003 All Rights Reserved
4-254
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
If the actual checksum does not match the setpoint checksum in MD 1399:
$MD_SAFE_DES_CHECKSUM, then the Alarm 300744 "Checksum error safe
monitoring" is displayed.
1399
$MD_SAFE_DES_CHECKSUM
611digital
Checksum of machine data for safety functions
Relevant for:
FD/MSD
Unit:
Default:
00 00 00 00
Minimum value:
00 00 00 00
Maximum value:
FF FF FF FF
Data type:
Long integer
Becomes effective:
POWER ON
This data contains the setpoint checksum of the actual values of the SI
machine data that was saved during the last machine acceptance test.
After POWER ON, the actual checksum is calculated, entered into MD 1398:
$MD_SAFE_ACT_CHECKSUM and compared with the setpoint checksum in
this data.
If the values are not identical, data has either been changed or there is an error
and Alarm 300744 "Checksum error safe monitoring" is displayed.