ABB ACS880-07 User Manual page 43

Index Name
S_ENCGEN.14 Enc speed cross
comp tolerance
S_ENCGEN.41 Gear numerator en-
coder 1
91.11 Module 1 type
91.12 Module 1 location
92.01 Encoder 1 type
92.02 Encoder 1 source
92.10 Pulses/revolution
92.17 Accepted pulse freq
of encoder 1
Example value Description
1 rpm Sets the encoder speed cross comparison
tolerance. This defines how much the axle
speed of the motor can change within 1 ms.
Adjust the default value to meet the motor
in use.
This parameter is used for the encoder dia-
gnostic. It defines how large the difference
between the speed information from channel
A and B of the encoder can be. If the differ-
ence between the speed information chan-
nels is larger than the value of this paramet-
er, FSO will safely stop the system (STO).
The suitable value depends on the configur-
ation (motor and load). Typically this value
is 2 ... 10 rpm. A value that is too small will
cause an encoder fault (A7D8) and a value
that is too large will prevent encoder dia-
gnostic related to this parameter.
For more information, see the FSO-21
module user's manual.
1 Sets the rotation direction for the safety en-
coder.
With this parameter, you can change the
rotation direction of the motor.
Adjust the default value if necessary.
FSE-31 Sets the type of the safety encoder interface
module 1.
2 Sets the slot in which the safety encoder
interface module 1 is located.
HTL1 Activates or deactivates the communication
with the safety encoder interface module 1
and sets the type for the safety encoder.
Module 1 Sets the safety encoder interface module
that the safety encoder 1 is connected to.
2048 Sets the number of HTL pulses per revolu-
tion for safety encoder 1.
Adjust the default value to meet the safety
encoder in use. Make sure that the value is
according to the encoder nameplate.
300 kHz Sets the maximum pulse frequency range
of encoder 1.
Adjust the default value to meet the motor
and safety encoder in use. You can use this
formula to define the value:
r_max · ppr_enc + 10%, where
• r_max = the maximum motor speed used
in the application (or the motor nominal
speed)
• ppr_enc = Pulses/revolution of the safety
encoder (parameter 92.10).
Parameter settings 43