Siemens SIMATIC S7-300 Manual page 180

Description of Functions
Table 9-1 Control signals, continued
Symbol
Name Name
English German
DRV_EN AF Drive en-
able
MODE BA Operat-
ing mode
MODE PA- BP Mode pa-
RAMETER rameter
OVERRIDE OVERR Override
9-4
... enables movement.
When the signal is reset, a rapid deceleration of the movement takes place.
On MD 37.15 = 0 program execution, or the movement, is canceled and the
residual distance is deleted.
On MD 37.15 = 1 machining resumes after emergency stop
Rapid deceleration of the movement.
On axis standstill FR+ or FR– = 0; BL = 1
– if the drive remains activated and the servo enable active, the axis is
held in position control mode.
– if the drive is deactivated, the user must activate "follow–up". This
deactivates zero speed control (the axis can be pushed away).
If an error occurs in this state (e.g. if the user starts a movement without a
start enable, etc.), an error response is initiated, e.g. the residual distance
is deleted, BL = 0, (a new path default must be defined).
Operating mode (see Section 9.2)
Code
Jogging
Open–loop control
Reference point approach
Incremental relative
MDI
Automatic
Automatic single block
... selects speed levels in Jogging mode.
... selects voltage levels in Control mode.
... selects increment in Incremental relative mode (value 1...100 or 254).
... affects response of traversing movement. Range: 0-255%
... override has no effect in Control mode
Velocity override
Range: 0-255%
Speed adjusted by percentage
Example: Override doubled from 100% to 200%
v
200 %
100 %
– speed v is doubled
– acceleration and deceleration values are not affected
v =
act
The positioning time is not cut in half.
Function Function
01
02
03
04
06
08
09
v
act
v
prog
v Override
prog
100
FM 354 Servo Drive Positioning Module
t