Technical data

Technology functions
CPU 317T: Technology Functions
A5E00251798-03
6-5
Note
The "MC_Power" technology function influences the following status bits of the
Statusword variable of the technology DB:
• DriveEnable
• FollowUpControl
• Simulation
Recommended procedure for locking an axis
To lock an axis:
1. Shut down the drive.
2. Disable the axis after the drive has reached standstill (Enable = FALSE).
Parameter Mode - Operating mode
The drive is enabled with a positive edge at input Enable.
Axis technology Possible operating modes
Physical axes Virtual axes
Velocity axis
Mode 0: Velocity-controlled
Mode 3: following mode
Mode 4: simulation
Mode 0: Velocity-controlled
Positioning axis
Mode 0: Position-controlled
Mode 3: following mode
Mode 4: simulation
Mode 0: Position-controlled
Synchronization axis
Mode 0: Position-controlled
Mode 3: following mode
Mode 4: simulation
Mode 0: Position-controlled
Parameter StopMode - Emergency program
An emergency program is triggered when a drive is disabled while it is in RUN
(negative edge at MC_Power), or when the CPU goes into STOP. The reaction of
the axis to such situations can be defined at input StopMode. StopMode is set at
the negative or positive edge at input parameter Enable.
The StopMode parameter is disabled when torque reduction is set. In this case, the
axis is locked instantaneously, and the drive is brought to a standstill based on its
internal ramp down settings.
When the CPU is set to STOP and the emergency program is started, the
emergency program must be executed within the "maximum shutdown time." On
expiration of the "maximum shutdown time", the CPU goes into STOP, and the
drives do not stop according to the selected StopMode, but rather according to the
drive configuration.
The "maximum shutdown time" can be configured in the S7T Config dialog box
"System cycles" (menu command PLC > Set System Cycles.)