Vacon NX series, Руководство по применению

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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)
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)
353 EXTERNAL BRAKE-ON DELAY 34567 (2.3.19, 2.3.4.10, 2.3.2.10)
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 8.3 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.
A B
t
t
DIN1: RUN FWD
STOP
External
BRAKE: OFF
ON
DO1/RO1/
RO2
DO1/RO1/
RO2
DIN2: RUN REV
STOP
DIN1: START
PULSE
External
BRAKE: OFF
ON
DIN2: STOP
PULSE
t
OFF
=ID352 t
ON
=ID353 t
OFF
=ID352 t
ON
=Par. ID353
Fig. 48: External brake control
A. Start/Stop logic selection, ID300 = 0, 1 or
2
B. Start/Stop logic selection, ID300= 3
354 FREQUENCY CONVERTER TEMPERATURE LIMIT SUPERVISION 34567 (2.3.20, 2.3.4.11,
2.3.2.11)
Table 135: Selections for parameter ID354
Selection
number
Selection name Description
0 No supervision
1 Low limit supervision
2 High limit supervision
If the temperature of the AC drive unit falls below or exceeds the set limit (ID355), this
function generates a message through a digital output depending on
PARAMETER DESCRIPTIONS VACON · 275
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