Siemens SIMATIC ET 200S - Inching (MODE 1)

1PosUniversal/Digital
7.6 Functions of the 1PosU
ET 200S Positioning
Operating Instructions, 05/2007, A5E00124871-04
329
7.6.5 Inching (MODE 1)
Definition
You use inching mode to control the drive directly in a particular direction using the DIR_M or
DIR_P control bits.
If you start MODE 1, the 1PosU moves the drive at the preset speed (SPEED control bit) in
the specified direction (control bit DIR_M or DIR_P).
You stop the drive by setting the control bits DIR_P = 0 and DIR_M = 0.
A change of direction is executed after the time T
min
elapses.
You can also activate inching on an unsynchronized axis (feedback bit SYNC = 0) or when
there is a pending encoder error (feedback bit ERR_ENCODER = 1) or without an encoder
connected.
SPEED
DIR_P
POS_ERR
POS_DONE
POS_ACK
DIR_M
SYNC
START
Rapid feed
Creep feed
Path
Figure 7-9 Execution of Inching