How does the FM 354 react to a signal change at the release input
A digital input is used on an FM 354 as release input (parameters
of MD 34 as in Table 9-13 in the manual).
If there is a change of signal at the release input during travel,
then you have the following reactions:
- Upon signal change from 1 to 0 at the release input the
travel is braked.
- Braking of travel:
In the modes Tip, Reference point travel, Incremental, MDI
and Automatic, the FM 354 brakes with the specified delay
In the Control mode, the FM 354 reduces the output voltage
according to the voltage ramp set (MD 45).
- Updating the status signals:
In the modes Tip, Incremental, MDI, Automatic and
Control, "Wait for external release" (WFG) is set, all the
other status signal remain unchanged. The travel is interrupted and
can be continued.
In the Reference point travel mode, upon axis standstill
"Processing in operation" (BL) and the direction signal (FR+ or
FR-) are reset and the start release (SFG) is set. The reference
point travel is terminated and has to be started
- Upon subsequent signal change from 0 to 1 at the release
input the interrupted travel is continued:
- In the modes Tip, Incremental, MDI, Automatic and
Control, the travel is restarted immediately. For Control
and Tip the control signal "Direction" (R+ or R-) must still be
- In the Reference point travel mode, travel is restarted
when the start signal is set.
More information on the release input is available in the manual
for the FM 354 " FM 354 Servo Drive Positioning Module V4.x" -
Entry ID 2110628, sections 9.8 and 9.8.1.