Siemens SIMATIC S7-300 Manual page 218

Description of Functions
9.3.3 Single commands (job no. 11)
Overview
You can use this function to transfer single commands to the FM 354. These
commands are:
Callup of single
The single commands are activated when the corresponding data record is
commands transmitted to the FM 354.
The commands are deleted in the FM 354 after execution.
Activate machine
Once you have downloaded the machine data (MD) or the MD block (from
data the programming device), the machine data have to be activated. At the first
parameterization, the machine data is transferred automatically. In terms of
effects, the FM 354 distinguishes between "K" and "E" machine data.
For machine data, see Section 5.3.1.
This command is possible only when the axis is not in motion ("Processing in
progress" = 0).
An MD block is likewise activated by switching on or off.
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Activate machine data
Delete residual distance
Automatic block search in reverse
Automatic block search forward
Restart
Undo set actual value
MD category
"K" "Reset" of the FM
As long as "Reset" is in progress, it is not possible to
transfer other data
For internal response, see Restart
"E" FM operating condition is maintained
Effect in FM 354 after activation
FM 354 Servo Drive Positioning Module