Zero Speed Logic [35] - WEG CFW-11 Programming Manual

Functions Common to All the Control Modes

12.6 ZERO SPEED LOGIC [35]

This function allows the configuration of a speed in which the inverter will enter a stop condition (disable itself).
It is recommended to use this function when the commands Run/Stop, Direction of Rotation, LOC/REM and
JOG are generated by the keyboard (HMI) or by the digital inputs (DIx).
P0217 – Zero Speed Disable
Adjustable
Range:
Properties:
Access groups
via HMI:
Description:
When on (N* and N), it disables the inverter after the speed reference (N*) and the actual speed (N) become lower
than the value adjusted in the parameter P0291 ± 1 % of the motor rated speed (hysteresis).
When on (N*), it disables the inverter after the speed reference (N*) becomes lower than the value adjusted in
parameter P0291 ± 1 % of the motor rated speed (hysteresis).
The inverter is enabled again when one of the conditions defined by the parameter P0218 is satisfied.
DANGER!
Be careful when approaching the motor while it is in the disable condition. It may get back to
operation at any moment because of the process conditions. In case you want to handle or perform
any type of maintenance, remove power from the inverter.
P0218 – Condition to Leave the Zero Speed Disable
Adjustable
Range:
Properties:
Access groups
via HMI:
Description:
It specifies if the condition to leave the zero speed disable will be only the speed reference or also the actual speed.
12
12-10
0 = Off
1 = On (N* and N)
2 = On (N*)
CFG
01 PARAMETER GROUPS
35 Zero Speed Logic
0 = Reference or Speed
1 = Reference
01 PARAMETER GROUPS
35 Zero Speed Logic
Table 12.5 - Condition to leave the N = 0 disable
P0218
(P0217 = 1)
0
1
Inverter leaves the condition of disable by N = 0
P0001 (N*) > P0291 or
P0002 (N) > P0291
P0001 (N*) > P0291
Factory 0
Setting:
Factory 0
Setting: