You are here: Technical Support > Technical FAQs > I want two stop times, normal and E Stop?

I want two stop times, normal and E Stop?

It has proved a popular request to have the facility for two stop ramp times - one for normal production stops and a very much faster one for emergency stop. This is easy to do, but before explaining how to do it a word about the use of "emergency stop". There are various differing opinions and safety legislations about emergency stopping, and we consider emergency stop to be the same as coast stop - in other words removal of power from the motor without relying on the drive electronics as far as possible. This of course does not stop the motor any faster than the natural coast down time of the entire system, so we recommend the use of additional braking techniques external to the drive if a quicker stop time than this is required. If you are considering using the drive electronics alone to stop the drive quickly under emergency stop conditions you should be aware of two points - firstly that the quick stopping time achieved will not occur in the event of a drive failure and secondly that you may be violating local safety codes. On the assumption that you are happy to use the drive electronics to control the emergency stop time, the technique is to use a digital input to set the stop mode ramp time. In addition to your normal sequencing you need to arrange for one of the digital inputs to be high for "normal" stop, low for "emergency " stop. Having done this, configure 56)STOP MODE RAMP as follows. (I have assumed you will be using DIP1 - you can use any digital input (or universal input) in the same way.)

Go to CONFIGURATION, ENABLE GOTO,GETFROM and set to ENABLED.
Go to CONFIGURATION, DIGITAL INPUTS, DIP1 (T14) SETUP and set 310)DIP1 IP HI VALUE to whatever you want your normal stop ramp time to be. For example, 1.00% gives a stop mode ramp time of 10.0 seconds, 3.5% gives a stop mode ramp time of 35 seconds. For an explanation as to why the values are not consistent see a later FAQ.
Go to CONFIGURATION, DIGITAL INPUTS, DIP1 (T14) SETUP and set 310)DIP1 IP LO VALUE to whatever you want your emergency stop ramp time to be. For example, 0.10% gives a stop mode ramp time of 1.0 seconds. The minimum time settable is 0.1 seconds.
Go to CONFIGURATION, DIGITAL INPUTS, DIP1 (T14) SETUP and set its GOTO to 56)STOP RAMP TIME.
Go to CONFIGURATION, ENABLE GOTO,GETFROM and set to DISABLED.

Don't forget to do a PARAMETER SAVE once you have finished.

Support

Brochures & Guides

Manuals

Datasheets

Software

FAQs

Glossary

DC Drive Replacement Finder

Digital DC Drive Feature Comparison Guide

Size Comparison Guide

Replacing Obsolete 1ph DC Drives