14 | WECM / Emerald eZA Manual
www.weg.net
6.4. HOW TO ADJUST THE MAXIMUM AND MINIMUM SPEED VALUE
On the WECM standard communication version, there are two ways to change the maximum
speed value for the remote speed adjust signals:
g
Using the product local tact buttons (only up to the maximum speed set by WEG EC Motor
Speed Controller)
Select local speed reference in the DIP switch number 1 (switch in ON position - see
item 6.2);
Using the tact buttons, adjust the speed to the value desired to be the maximum;
Select remote speed reference in the DIP switch number 1;
g
Using the optional WEG EC motor external speed controller (see item 6.4) (up to the nameplate
speed).
NOTE!
g
The standard manufacturing preset value for the maximum speed is the rated
speed informed in the product nameplate;
g
Consult WEG about different standard maximum speed values.
Signal Type Condition Resulting frequency value
Conductors
1 2
Frequency
(speed reference)
Speed = zero zero (output voltage: 4,8V)
white black
Speed > zero speed(rpm) x 0,6015
6.3. CONTROL OUTPUT REFERENCE
The WECM includes a speed reference. This signal is on at the white control cable. Whenever the
white control cable is measured against the ground, a train of pulses with maximum peak value
of 4,8V can be measured. The frequency of this train of pulses is proportional to the speed of the
motor as per explained on the table 6.2 below
Control output reference:
6.4.1.MAXIMUM SPPED
6.4.2. MINIMUM SPEED
The minimum speed of the WECM motor line is fixed and cannot be change with the use of a stan-
dard software. The minimum speed of the line follows the logic of the table below:
Rated speed ≤400rpm >400rpm and ≤1800rpm >1800rpm
Minimum speed 45rpm 200rpm 500rpm
Table 9 - Minimum speed according to motor rated speed
Consult WEG about different factory minimum speed values.
For MODBUS optional please refer to specific manual accesible in www.weg.net
Table 8 - Control output reference
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