When STEPMOVE command is first executed, the internal relay #r  will be cleared before the first pulse is sent. After the completion of the movement (i.e. when all the pulses have already been sent), the relay #r   will be set.

ch should be between 1 and 8. count is a 32-bit integer number which allows you to program the stepper motor to move from -2³¹ to +2³¹ .(i.e. about ± 2 x 10⁹) steps. count can also be an integer variable A-Z. However, If you use a 16-bit variable such as DM[n] for count   then the range of movement can only be between 1 to 32,767.

Pulse generation can be interrupted by issuing a STEPSTOP command in another CusFn, which may occur say, in cases when the hardware hits a limit-switch and must stop the motor immediately.

Important: When a stepper channel is already activated (i.e. mid-way through its pulse generation) repeat execution of STEPMOVE command on the same channel will be ignored by the PLC. Re-execution of the STEPMOVE command on this channel can only take effect after the channel’s pulsing operation has been completed by itself or aborted by the STEPSTOP command.

When in i-TRiLOGI simulation mode, execution of the STEPMOVE command will bring up a pop-up window which displays all the parameters of the motion path.