Siemens SINUMERIK 840Di User Manual

06.03
16.2 Expanded message frame configuration (SW 2.2 and higher)
16-508
 Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
16.2.4 Boundary conditions
The following restrictions are applicable with regard to the “expanded message
frame configuration” function:
S Additional data can only be transferred from the drive to the SINUMERIK
840Di NC (actual value channel). You cannot transfer data in the other direc-
tion, i.e. from the NC to the DP slave drive (setpoint channel).
S You can only have read access to the drive data stored in the system vari-
ables.
At SINUMERIK 840Di boot, the NC checks the consistency of the process data
configuration (PDA) of the parameters relevant to the cyclic PROFIBUS commu-
nication:
S NC
– MD 13060: DRIVE_TELEGRAM_TYPE[n] (drive message frame type)
S DP master (configuration)
– DP Slave Properties > Configuration > Setpoint: Length
– DP Slave Properties > Configuration > Actual Value: Length
S Drive
– Parameter P0922 message frame selection
– Parameter P0915[x] PDA setpoint assignment
– Parameter P0916[x] PDA actual value assignment.
If the number of process data expected from the NC set in the message frame (telegram) type pa-
rameter in the NC machine data:
S MD 13060: DRIVE_TELEGRAM_TYPE[n] (drive message frame type)
is greater than the number of process data configured with STEP7: HW Config for the DP slave
drive:
S DP Slave Properties > Configuration > Setpoint: Length
S DP Slave Properties > Configuration > Actual Value: Length
or if the process data configuration determined at the drive-end from the drive parameters:
S P0922 message frame selection
S P0915[x] PDA setpoint assignment
S P0916[x] PDA actual value assignment
does not match the message frame type of the NC machine data, then the following alarm is issued:
S Alarm 26015 “Axis axis identifier machine data $MN_DRIVE_TELE-
GRAM_TYPE[index] value not permissible”.
If acyclic communication is not supported by a drive, or if acyclic communication
was not explicitly deactivated for a drive via the axis-specific NC machine data:
S MD 13070: DRIVE_FUNCTION_MASK[n] (used DP functions)
then responsibility lies solely with the start-up engineer to perform a consistency check on the above
data.
Restrictions
Consistency check
No acyclic
communication
possible
16 840Di S
p
ecific Data and Functions

Siemens SINUMERIK 840Di Specifications

General

Brand	Siemens
Model	SINUMERIK 840Di
Category	Control Unit
Language	English