ABB ACS880 N5700 Series - Encoder Echo and Emulation; Settings and Diagnostics; Jogging

• Resolver interface FEN-21: resolver input, TTL input, TTL output (for encoder
emulation and echo) and two digital inputs
• HTL encoder interface FEN-31: HTL encoder input, TTL output (for encoder
emulation and echo) and two digital inputs
• HTL/TTL encoder interface FSE-31 (for use with an FSO-xx safety functions
module): Two HTL/TTL encoder inputs (one HTL input supported at the time
of publication).
The interface module is to be installed onto one of the option slots on the drive
control unit. The module (except the FSE-31) can also be installed onto an FEA-03
extension adapter.
Encoder echo and emulation
Both encoder echo and emulation are supported by the above-mentioned FEN-xx
interfaces.
Encoder echo is available with TTL, TTL+ and HTL encoders. The signal received
from the encoder is relayed to the TTL output unchanged. This enables the
connection of one encoder to several drives.
Encoder emulation also relays the encoder signal to the output, but the signal is
either scaled, or position data converted to pulses. Emulation can be used when
absolute encoder or resolver position needs to be converted to TTL pulses, or
when the signal must be converted to a different pulse number than the original.
Settings and diagnostics
Parameter groups 90 Feedback selection (page 484), 91 Encoder module
settings (page 489), 92 Encoder 1 configuration (page 493) and 93 Encoder 2
configuration (page 501).
￭
Jogging
The jogging function enables the use of a momentary switch to briefly rotate the
motor. The jogging function is typically used during servicing or commissioning
to control the machinery locally.
Two jogging functions (1 and 2) are available, each with their own activation sources
and references. The signal sources are selected by parameters 20.26 and 20.27.
When jogging is activated, the drive starts and accelerates to the defined jogging
speed (22.42 or 22.43) along the defined jogging acceleration ramp (23.20). After
the activation signal switches off, the drive decelerates to a stop along the defined
jogging deceleration ramp (23.21).
The figure and table below provide an example of how the drive operates during
jogging. In the example, the ramp stop mode is used (see parameter 21.3).
• Jog cmd = State of source set by parameter 20.26 or 20.27
Program features 85