3-30 Description of diagnostic letters F... and E... ECODRIVE03 SMT-02VRS
DOK-ECODR3-SMT-02VRS**-WA01-EN-P
E254 Not homed
If absolute positions are selected while in a positioning operation mode,
the control drive must be homed to a reference position. If this is not the
case, an absolute position cannot be reached. The drive rejects this
positioning command and stops. The warning E254 will be given.
Cause:
Absolute positioning was selected without the drive being referenced.
Remedies:
1. Do the homing (referencing) command with the drive or
2. do only relative positioning.
See also the function description "Drive-Controlled Homing".
E255 Feedrate-override S-0-0108 = 0
With the parameter S-0-0108, Feedrate override, the travel velocity of
all drive-controlled travel commands can be changed proportionally
(in %).
If the value of this parameter is 0, the travel velocity is also 0. With
velocity = 0, the motor remains stationary despite having a commanded
value.
Causes:
1. The parameter S-0-0108, Feedrate override is 0.
2. For devices with analog inputs: Feedrate override via analog input is
activated, and the voltage at the analog input is 0.
3. The feed potentiometer of the connected control system is at 0 or is
being evaluated incorrectly.
Remedies:
For 1.: Set Feedrate override > 0, so that the drive moves. Full speed is
attained with 100% .
For 2.: Apply a voltage > 0 proportional to the desired speed,
+10V corresponds to 100 % (full) speed.
Alternative: De-activate Feedrate override.
For 3.: Turn the feed potentiometer cautiously, check the analog signal
and the evaluation for it.
See also the functional description: "Sequence control Drive-Controlled
Homing".
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