TECO F33 Series, Instruction Manual, Page: 99 / 192

96 Functional Description
Communication information
Stop/Sleep when less than Minimum
Speed [342]
With this function it is possible to put the VSD in “sleep
mode” when it is running at minimum speed for the
length of time set, due to process value feedback or a
reference value that corresponds to a speed lower than
the min speed set. The VSD will go into sleep mode
after programmed time. When the reference signal or
process value feedback raises the required speed
value above the min speed value, the VSD will automat-
ically wake up and ramp up to the required speed.
Communication information
Fig. 81
Maximum Speed [343]
Sets the maximum speed at 10 V/20 mA, unless a
user- defined characteristic of the analogue input is
programmed. The synchronous speed (Sync-spd) is
determined by the parameter motor speed [225]. The
maximum speed will operate as an absolute maximum
limit.
This parameter is used to prevent damage due to high
speed.
Communication information
Skip Speed 1 Low [344]
Within the Skip Speed range High to Low, the speed
cannot be constant in order to avoid mechanical reso-
nance in the VSD system.
When Skip Speed Low
≤
Ref Speed
≤
Skip Speed High,
then Output Speed=Skip Speed HI during deceleration
and Output Speed=Skip Speed LO during acceleration.
Fig. 82 shows the function of skip speed hi and low.
Between Skip Speed HI and LO, the speed changes
with the set acceleration and deceleration times.
Skipspd1 LO sets the lower value for the 1st skip range.
Modbus Instance no/DeviceNet no: 43121
Profibus slot/index 169/25
Fieldbus format Int, 1=1 rpm
Modbus format Int, 1=1 rpm
NOTE: Menu [386] has higher priority than menu [342].
Default: Off
Off 0 Off
1–3600 1–3600 1–3600 s
Modbus Instance no/DeviceNet no: 43122
Profibus slot/index 169/26
Fieldbus format Long, 1=0.01 s
Modbus format EInt
342 Stp<MinSpd
Stp Off
A
(NG_50-PC-9_1)
PID ref
Min
PID out
PID fb
[342]
speed
Default: 1500 rpm
Range: Min Speed - 4 x Motor Sync Speed
Dependent on: Motor Speed [225]
Modbus Instance no/DeviceNet no: 43123
Profibus slot/index 169/27
Fieldbus format Int, 1=1 rpm
Modbus format Int, 1=1 rpm
NOTE: It is not possible to set the maximum speed lower
than the minimum speed.
NOTE: Maximum speed [343] must be set to the
synchronus speed of the motor (no-load speed) to reach
a speed corresponding to the rated frequency of the
motor Example: 4-pole 50 Hz motor= 1500 rpm.
Default: 0 rpm
Range: 0 - 4 x Motor Sync Speed
343 Max Speed
Stp 1500 rpm
A
344 SkipSpd 1 Lo
Stp 0rpm
A