Safety
Information
Product
Information
Mechanical
Installation
Electrical
Installation
Getting
Started
Basic
parameters
Running
the motor
Optimization
SMARTCARD
operation
PC tools
Advanced
parameters
Technical
Data
Diagnostics
UL Listing
Information
216
Affinity User Guide
www.controltechniques.com Issue Number: 5
Preset references
Preset references 1 to 8 are contained in Pr
1.21
to Pr
1.28
.
Keypad reference
If Keypad reference is selected the drive sequencer is controlled directly
by the keypad keys and the keypad reference parameter (Pr
1.17
) is
selected. The sequencing bits, Pr
6.30
to Pr
6.34
, and Pr
6.37
have no
effect and jog is disabled.
11.21.2 Hand / Off / Auto
Hand / Off / Auto functions are enabled if Pr
1.52
is set to a non-zero
value, otherwise the keypad buttons are allocated as follows:
•
Blue
- Forward/Reverse
•
Green
- Run
•
Red
- Reset
When Hand / Off / Auto functions are enabled (Pr
1.52
set to either 1, 2
or 3), then the keypad buttons will be allocated as follows:
•
Blue
- Auto
•
Green
- Hand
•
Red
- Off/Reset
The value in Pr
1.52
selects Hand/Off/Auto mode on power-up as shown
Table 11-9 Hand/Off/Auto mode
Table 11-10 Power-up modes if Pr 1.52 = 3
Auto
In Auto mode, the reference for the motor speed/frequency will be
selected by the value set in Pr
0.05
.
Hand
The speed/frequency reference Pr
0.05
is automatically set to keypad
reference. The motor speed is determined by the value in the keypad
control mode reference Pr
1.17
, which can be adjusted by pressing the
Up/Down arrows on the keypad.
When Hand is selected from Auto, Pr
1.17
will be set to the value of the
Pre-ramp reference
(Pr
1.03
) on mode transition, so the current motor
speed is maintained.
If Hand mode is selected from Off mode, the motor will ramp up to the
speed determined by the value in Pr
1.17
.
Off
In Off mode, the motor will be stopped. The speed/frequency reference
(Pr
0.05
) is automatically set to keypad reference allowing the value in
the
keypad control mode reference
(Pr
1.17
) to be modified by pressing
the Up/Down arrow keys. If Hand mode is then selected, the motor will
ramp up to the speed determined by the value in Pr
1.17
.
11.21.3 Fire mode
Emergency ventilation or fire mode allows for the purging of air from a
structure during a fire. It is enabled if Pr
1.53
is set to a non zero value
and activated when Pr
1.54
is set to one. When activated, the pre-ramp
reference (Pr
1.03
) is set to the value of Pr
1.53
and the normal drive
controls are overridden as follows:
1. Drive enable is only controlled by the Enable input (Pr
6.15
). The
control word (Pr
6.43
) cannot be used to disable the drive.
2. The internal run command is forced to be active. The normal drive
sequencing bits (Pr
6.30
to Pr
6.34
) and the control word have no
effect.
3. The limit switch functions (Pr
6.35
and Pr
6.36
) have no effect and
will not stop the motor.
4. The hard speed reference is forced to zero. The hard speed
reference should not be used when fire mode is likely to be activated
as this will cause an abrupt change of speed.
5. The hand/off/auto function is disabled. If this system is in the hand
state when fire mode is activated it will be forced to the off state, so
that hand state is not active when fire mode is de-activated.
6. Keypad mode is disabled.
7. All latching mode states are reset.
When Pr
1.54
is subsequently set to zero the drive returns to normal
operation.
Pr
1.54
can only be changed from a digital input and the default
configuration allocates this to digital input 4.
1.52
Enable Hand / Off / Auto keypad operating mode
RW
Uni
US
Ú
0 to 3
Ö
1
Pr 1.52
Power up
0
Hand/Off/Auto disabled
1
Auto Mode
2
Off Mode
3
See table Table 11-10
Power-down
Power-up
Hand
Off
Off
Off
Auto
Auto
Fire Mode - Important Warning.
When Fire Mode is active the motor overload and thermal
protection are disabled, as well as a number of drive
protection functions. Fire Mode is provided for use only in
emergency situations where the safety risk from disabling
protection is less than the risk from the drive tripping -
typically in smoke extraction operation to permit evacuation
of a building. The use of Fire Mode itself causes a risk of fire
from overloading of the motor or drive, so it must only be
used after careful consideration of the balance of risks.
Care must be taken to prevent inadvertent activation or de-
activation of Fire Mode. Fire Mode is indicated by a flashing
display text warning "Fire mode active".
Care must be taken to ensure that parameters Pr
1.53
or
Pr
1.54
are not inadvertently re-allocated to different inputs or
variables. It should be noted that, by default, Pr
1.54
is
controlled from digital input 4 and changing Pr
6.04
or Pr
8.24
can re-allocate this digital input to another parameter. These
parameters are at access level 2 in order to minimize the risk
of inadvertent or unauthorized changes. It is recommended
that User Security be applied to further reduce the risk (see
section 5.10
Parameter access level and security
page 97). These parameters may also be changed via serial
communications so adequate precautions should be taken if
this functionality is utilized.
1.53
Fire mode reference
RW
Uni
US
OL
Ú
±SPEED_FREQ_MAX
Hz/rpm
Ö
0.0 Hz
RFC
0.0 rpm
1.54
Fire mode activation
RO
Bit
NC
US
Ú
OFF (0) or On (1)
Ö
WARNING
Содержание Affinity
Страница 274: ...0474 0000 05 ...