Vacon NX Series Applications Manual page 250

VACON · 250
1. the settings of parameters ID312 to ID314 (applications 3,4,5) or
2. to which output the reference limit supervision signal (parameter ID449) is connected
(applications 6 and 7).
The supervised reference is the current active reference. It can be place A or B reference
depending on DIN6 input, I/O reference, panel reference or fieldbus reference.
351 REFERENCE LIMIT, SUPERVISION VALUE 34567 (2.3.17, 2.3.4.8, 2.3.2.8)
Use this parameter to set the limit supervision value for the reference value when you
activate the reference limit supervision function.
The frequency value to be supervised with the parameter ID350. Give the value in percent of
the scale between the minimum and maximum frequencies.
352 EXTERNAL BRAKE-OFF DELAY 34567 (2.3.18, 2.3.4.9, 2.3.2.9)
Use this parameter to set the delay time to open the brake after the conditions to open the
brake are filled.
353 EXTERNAL BRAKE-ON DELAY 34567 (2.3.19, 2.3.4.10, 2.3.2.10)
Use this parameter to set the delay time to close the brake after the conditions to close the
brake are filled.
The function of the external brake can be timed to the start and stop control signals with
these parameters. See Fig. 48 External brake control and Chapter 9.3 External brake control
with additional limits (IDs 315, 316, 346 to 349, 352, 353).
The brake control signal can be programmed via the digital output DO1 or via one of the relay
outputs RO1 and RO2, see parameters ID312 to ID314 (applications 3,4,5) or ID445
(applications 6 and 7). The brake-on delay is ignored when the unit is reaching a stop state
after a rampdown or if stopped by coasting.
t =ID352
OFF
External
BRAKE: OFF
ON
DIN1: RUN FWD
STOP
DIN2: RUN REV
STOP
Fig. 48: External brake control
A. Start/Stop logic selection, ID300 = 0, 1 or
2
9
A
t =ID353
ON
DO1/RO1/
RO2
t
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B
t =ID352
OFF
External
BRAKE: OFF
ON
DIN1: START
PULSE
DIN2: STOP
PULSE
B. Start/Stop logic selection, ID300= 3
PARAMETER DESCRIPTIONS
t =Par. ID353
ON
DO1/RO1/
RO2
t