DCS 500 manual Symbols for enabling / disabling the reference, System-dependent planning

Chapter 2 - Start-Up Instructions

Symbols for switching the electronics or the power section ON and OFF

- Switch ON electronics
- Switch ON power	X6: 7 ⇒ „1“ signal	(input ON / OFF)
	(K20 in connection example)
- Switch OFF electronics
- Switch OFF power	X6: 7 ⇒ „0“ signal	(input ON / OFF)
	(K20 in connection example)

•Binary input DI8; designation RUN

For starting the drive, DI8 must be set to logical „1“. This enables the reference at the REF_SEL and RAMP GENERATOR blocks, as well as the controllers. If DI8 is set to "0“, the drive will react in accordance with the function set at Parameter 916 (shut- down with ramp, with torque limit/current limit, with controller block and coasting).

Once ramp-down has been completed (speed feedback below nmin), the reference is kept at zero, and the controllers blocked after a time-delay; the drive is torqueless.

Symbols for enabling / disabling the reference

- ENABLE reference	X6: 8	⇒ „1“ signal	(input RUN)
	(K21 in connection example)
- DISABLE reference	X6: 8	⇒ „0“ signal	(input RUN)
	(K21 in connection example)

System-dependent planning

If you want the drive to react with a function other than that of Parameter 916 or 917, you have to parameterize the unit accordingly, by connecting one of the inputs or an addi- tional one with a control pin, e.g. at the ramp-function generator.

- Example 1:

Operational ramp-up and ramp-down in the event of reference changes with the same ramp times, shutdown via RUN with a different time.

Solution:

use second parameter set ramp times; set time at DECEL2; establish connection from P 1707 to P 10716.

- Example 2:

Implementing an EMERGENCY SHUTDOWN or EMERGENCY STOP function. Solution:

this function stipulated in various regulations must always be planned in dependence on the system involved! A basic distinction must be made here between electrical and me- chanical risks. Since one signal at one input is not sufficient (see above), at least one other switch-off option must be created, e.g. by means of a relay directly switch-

ing input DI5 to "0“. This is how the power converter attempts (in accordance with P 917), to defuse the dangerous situation. A dropout-delay contact of the relay will then switch the power off. If the delay is small or does not match the function selected for P 917, then certain operating states (regeneration) may, due to laws of physics, result in the unit fuses tripping, and in extreme cases in thyristor defects.

DCS 500B / DCP 500B Operating Instructions IV A 2 - 3

3ADW000055R0401_DCS500B_Operating Instruction_e_d