840Di-specific data and functions
18.2 Expanded message frame configuration/evaluation of internal drive variables
Manual
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
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Figure 18-2 Mapping principle: PDA on system variable $VA_DP_ACT_TEL
NOTICE
The responsibility for possibly necessary format conversions or correct interpretation of the
physical unit and significance of a system variable used in part programs or synchronized
actions lies exclusively with the user. Due to system restrictions, it is not possible for the
NC to perform a consistency check.
18.2.2 Requirements
The following conditions must be fulfilled for the transfer of additional drive variables:
● Drive
The drive must support SIEMENS message frame 116 or free message frame
configuration.
● DP master/SIMATIC STEP 7
No additional requirements
● SINUMERIK 840Di sl NC
– The option must be avaliable:
"Evaluation of internal drive variables",
Order No. (MLFB): 6FC5 251-0AB17-0BA0
– The NC machine data should be set:
MD36730 $MA_DRIVE_SIGNAL_TRACKING[n] (acquisition of additional drive actual
values)