Jog Mode

Valid for S300, S400, S600, S700 

General

Jog mode is possible only in operation modes 4, 5, 6 or 8 and need no homing. Software limit switches are not effective because no reference point has been set. Therefore jog mode is possible immediately after the amplifiers has been switched on. Hardware limit switches are effective.

Jog mode can be started e.g. with the ASCII command MJOG via the RS232 interface, with the CAN Bus object no.: 3591 or with Profibus PNU 1745, Ind:1. Check the fieldbus manuals and the ASCII reference guide for further possibilities to start the jog mode.

Velocity and direction for the command MJOG are defined in the variable VJOG. Observe the required dimension, which is defined in VUNIT.

Jog mode can be started with a digital input as well, with rising edge evaluation.

S300 / S400 / S600 / S700

Set function 20 at one of the digital inputs and set velocity and direction to the auxiliary variable, e.g. '-1000' for negative direction and 1000rpm or '200' for positive direction and 200rpm.

S300 / S700

Set function 28 at one of the digital inputs. A rising edge starts the jog mode with the velocity defined in variable VJOG with the defined dimension in variable VUNIT. A falling edge stops the motion.

For acceleration and decelaration the values ACCR und DECR for reference tasks (homing) are used.

Another possibility to realize a kind of jog mode is function 39, (constant velocity for a defined time).

This function INxMODE=39 starts a constant velocity for a defined time. The parameters for velocity and time are given by IN1TRIG. The velocity is given by the lower 16 bit (scaling by VUNIT), bit 15 is the sign and defines the moving direction and the time by the upper 16 bit (given in msec) of the help variable IN1TRIG. A rising edge at INPUT1 changes the OPMODE to 0 (digital velocity) and gives the velocity that is given by IN1TRIG. After the defined time or a falling edge at INPUT1 is detected, the digital velocity setpoint is set to "0". After the actual velocity has reached "0" the OPMODE is automatically switched back to the old one.

If you set a velocity value only without a time, you receive a constant movement as long as a signal is given to the digital input.

Note!: With this function the opmode is switched to "digital velocity", therefore all velocity controller parameters are active!