View Full Version : Sequence of event recorder
May 22nd, 2006, 05:02 AM
I want some information regarding Sequence of event recorder in DCS/PLC. Is it required to add some special module for sequence of event recording? Or Process controller it self is sufficient to perform this function? I worked with ABB DCS .I have not found any special module there. Is there any deference between DCS and PLCs to use this function?
May 22nd, 2006, 06:11 AM
Typically something like this is done with a historian that is not part of the control system, but is connected to it. Most DCS systems have a historian option, as do most SCADA systems. By historizing discrete and analog control values, you can go back in time and see what was happening at any given moment.
May 22nd, 2006, 07:19 AM
Thanks to search_automation and Ken Moore
Is the module need hard wiring?
I am now searching for SOE modules of Rockwell and ABB.
Thanks once again
May 22nd, 2006, 07:30 AM
Below are SOE modules that Rockwell offers for the Contrologix platform:
1756-IB16ISOE (24-48 vdc)
1756-IH16ISOE (125 vdc)
GPS Time Input modules
The Input modules can provide microsecond time-stamping.
May 22nd, 2006, 11:55 PM
Is it possible to use anlalog signal for these SOE special modules ?
1756-IB16ISOE (24-48 vdc)ABB module is useful for digital inputs only.
May 23rd, 2006, 06:43 AM
AB does not have any special SOE analog input modules, but a standard analog input, like the 1756-IF16, can be configured for high-speed CST (coordinated system time) time-stamped data.
May 24th, 2006, 11:29 AM
May 24th, 2006, 11:35 AM
I am new to this form. I am working on a project for substaion automation. We r using SLC 500 to connect the alaram of 8 individual substaions to a master SCADA substation. The SCADA master needs to pull out sequence of events for each subs. I am not sure id SLC 500 can do any of the fillowing functions-
-Trasient fault analsysis.
-Power quality monitor.
-Fault locator-to calculte the distance of fault
-On-line switchgear monitor.
Do I need seperate modules tp performa the above functions. I have searched AB site for this info, but did not finf any. can anybody help?
May 24th, 2006, 12:01 PM
You will need to go with the ControLogix platform; there are no SOE modules or time-stamping capability with the SLC. I do know that a GPS module (typically used for SOE time-stamping) has been released for the CompactLogix platform, but I'm not aware of any hi-speed SOE input modules.
May 24th, 2006, 12:06 PM
If you are looking for sequence recorders that can do sub-cycle (60Hz/50Hz) you need to look at manufacturers that make this type of product such as Dranitz for power (transient, power quality, fault sequence) or Bently-Nevada for Vibration.
AB and Modicon have products for substations that can do this type of SOE and will need to get the data up to your historian from the module. I am not certain what the response time rating of the individual I/O points are, however, you should check to be sure your application needs are met. If you want to try to have your standard historian software with OPC communication links to talk to a PLC to get data from an I/O point every 1-10 msec, then I wish you luck.
December 21st, 2010, 01:52 AM
I am new to this form. I am working on AUTOMATION systems. We r using MAXIFLEX SEQUENCE EVENT RECORDER to connect the alaram of 8 individual substaions to a master SCADA substation. The SCADA master needs to pull out sequence of events for each subs. I am not sure that what it can do, please give the various parameters that it can reacord as events, with application as example.
Plz give me awareness on this on which parameters we can work with this and how we can give the alaram annunciator to the scada system.