CLRS Series RS485 Closed Loop Stepper Drive User Manual
Appendix A Parameters List
1. Modbus RTU Parameters
The STEPPERONLINE RS485 parameter data type is 32-bit data, and a parameter contains two registers, high 16
bits and low 16 bits, but in practice most parameters only need to use the low 16 bits. When reading and writing
multiple parameters in succession, the high 16 bits of the parameter need to be used as the start.
Value “0” for open loop;
Value “2” for closed loop;
Value “1” is reserved.
Allowed max position
following error
It’s used to set the allowed max pulse count of
position errors.
Forced enable by software
Software forced enable has a higher priority
than IO enable, and when this value is 0, the
enable status of the drive only depends on the
IO signal. When this value is 1, the motor is
enabled regardless of the IO signal status.
Increase this value will reduce position
following error, but could result in motor
vibration
This parameter is used for tuning Velocity loop
proportional gain.
Increase the value can increase velocity
stiffness
To configure the time for internal command
filtering
Velocity switching point:
open loop to closed loop
Usually keep the default value.
Only change it when it causes motor vibration
at this mode switching velocity point.
Velocity switching point:
closed loop to open loop
Usually keep the default value.
Delay time of open loop to
closed loop
Usually keep the default value.
Delay time of closed loop
to open loop
Usually keep the default value.
Default is normal-open(N.O) type, it can be set
to normal-closed(N.C) type by setting the
corresponding port +0x80
SI1 is enable(default), N.C type input.
0: invalid; 7: alarm clearing;
8: enable (also can be set by 0x00F);
0x20: Trigger command;
0x21: Trigger homing;
0x22: EMG (quick stop);
0x23: JOG+;
0x24: JOG-;
0x25: POT (positive limit);
0x26: NOT (negative limit);
0x27: ORG (home switch);
0x28: ADD0 (path address 0);
0x29: ADD1 (path address 1);
0x2A: ADD2 (path address 2);
0x2B: ADD3 (path address 3);
0x2C: JOG velocity 2
Default is normal-open(N.O) type, it can be set
to normal-closed(N.C) type by setting the
corresponding port +0x80
0: invalid;
0x20: command completed;
0x21: path completed;
0x22: homing completed;