R&M Materials Handling VARIABLE SPEED CONTROLS ControlMaster NXT Service Manual - Manual (Page 29)

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5.2.8 S4 Control method and slowdown mode in traveling movement application
The frequency converter can be parametrised for two different control methods. The control method options are
listed in the following table. The descriptions of the control methods are given in the section “Control methods”.
Digital inputs and the control method:
Terminal Name MS2 EP2
1 DI1 S1 S1
2 DI2 S2 S2
3 DI3 MS2 AP
4 DI4 S11/S21 S11/S21
5 DI5 *) S12/S22 S12/S22
6 DI6 ES ES
*) Note: As factory default DI5 is not in use. The stop limit signal shall be connected in series to direction signals
respectively.
Control signals:
S1 Drive command forward
S2 Drive command reverse
MS2 Multistep 2 frequency
AP Acceleration command
S11 Slowdown limit forward
S12 Stop limit forward
S21 Slowdown limit reverse
S22 Stop limit reverse
ES External stop, used for thermal protection of the motor
Switch S4 - 1 Control method
0 EP2
1 MS2
The switch model has one slowdown input DI4. There are two ways to handle the slowdown command and the
selection is made with switch S4-2. Alternatives are shown in the following table. As the slowdown limit switch
contact opens during running, the maximum speed is limited in the running direction.