rajsiyer

I have just started my youtube channel The Control Philosopher wherein I will regularly post topics of interest to people in this Automation community. So far, I have posted just 4 Videos 1. Connecting PLCs to MCCs How to safely interface PLC IOs to Motor control Centres 2. Understanding the Basics of VFDs Part-1. The Very basics 3. Understanding VFDs Part-2 Covers Load Types, Energy saving principles 4. Understanding VFDs Part-3 Covers Selection, Configuration and Harmonics

Thanks, but the settings for NATing the HMI appear to be disabled. I believe if the Use NAT check-box on vijeo-designer was available to be ticked and so also if the ports and public IP address of the router were configrued, we would have seen it on the local netework

I am attempting to download a Vijeo designer application to a remotely situated Magelis HMI over the cloud by means of a VPN. Vijeo designer's built-in help indicates that this is possible and has provided an example. BTW, I am using Vijeo Designer basic v1.1 & the HMI model is GXU3512. However, I find the fields for router IP and TCP port nos. all deactivated. How to get pass this roadblock? I'll appreciate any suggestions. Thanks a million

Hi, I am attempting to download a Vijeo designer application to a remotely situated Magelis HMI over the cloud by means of a VPN. Vijeo designer's built-in help indicates that this is possible and has provided an example. BTW, I am using Vijeo Designer basic v1.1 & the HMI model is GXU3512. However, I find the fields for router IP and TCP port nos. all deactivated

Thanks for looking in Dan. You are right in every bit of what you say. However till date, I haven't found the byte order selection setting in the OPC server we're using for Iconics.. As you say, Indeed we're looking for it. Meanwhile we had to add a few rungs of code in the PLC to swap the problem variables that have to be shown on Iconics. Thanks

Hi Fellas, Has anyone played with this ABB PLC and taken out data on its Ethernet port. The scene is like this.. This PLC communicates with a slave device on Ethernet and is also connected SCADA on the same network. (OPC on Iconics v9.32). The slave device is a big endian. So we have set the ethernet port on the PLC to talk Big-Endian so that correct math can be done on the slave's data within the PLC. So far so good. Now the OPC server for Iconics does not have the Byte-swap feature. When we connect PLC to Iconics, it is displayed as swapped! So the question begs.. When a ethernet port is connected to an f Big endian slave and a little-endian Scada at the same time, how does one proceed? Thanks a million for looking in and will appreciate any help/advice Raj S. Iyer

Ni Hao a062549 Thanks a million. What I now understand is that Schneider has a small application created in C/VB that runs in the ibackground. However, in my case I was able to solve the problem by changing the firmware of the meter so that another address retained the value as 32 bit real. Thanks and all the best

Hi friends, The scene is like this... I have some 200 energy meters whose readings are continuously logged at 15-min intervals into a logging table. The meter does not have any other value logged. Let's consider these readings as analog tags. However these tag values are continuously increasing to ever larger numbers. Thus we have a problem for display on trends. Customer now requires that the Citect shows usage trends for any meter for a specified period of the past. That is to say, the meter that he wishes to observe is selected - along with a period typically between 2 dates (perhaps also with a sampling period) - and the trend must appear. So in other words, given a single trend object, how do you make values appear for any selected tag on this trend. Perhaps this can be overcome by some genie/super-genie mechanism. My approach to this is...For the selected meter, I use SQL to query the 15 minute logged values (also taking into account the required sampling period) taking the reading on starting date as initial. All values thereafter are subtracted -within the SQL query- and the result of this query is kept in a 2 dimensional array(x for time, Y for value) or a new database table so that the trend displays values starting with zero. This much I can do with Cicode. After this, I need a method to display the values so obtained in a trend object. Essentially this is the same as feeding a trend object with a set of X & Y values that I have in the form of an array or in a database table. I shall greatly appreciate any help to meet the above objective. Thanks for looking in. With best wishes.

In my present project, I have to interface an energy meter that has its kWh count in 64 bit Double format. Now that Vijeo citect hasn't a facility to create tags of the "double' type I am looking for a work-around to this problem. Thanks for any help/advise in this matter

Hi friends, I have about 60 on-off valves each with about 6 signals in my current project. Recently, I have learnt how to make a face-plate for this and connect the face-plate's property interfaces with tags needed for each valve. Now I wish to make a single pop-up screen to control these valves. When I click the face-plate of a given valve, its tags must be assigned to the pop-up screen that will have switches/lights for its control & status. Thanks for looking in and I shall appreciate all advice for implementing this.

Hi friends, I am a little new to WinCC. I am using a WinCC RT Advanced license within TIA portal v13.1 I need a little help in my current project as described below. I am attempting to create a faceplate of a solenoid valve,, The "Valve" is a user-defined data-type with the following 4 elements 1. Cmd - or command. - Bool 2. Cls_Fb - or Closed -Feedback -Bool. 3. Aut - or Automatic Mode -Bool 4. FTC - Fails to close -Bool. I tried the following procedure as described in TIA portal help.. Method -1 1. I created a User-defined data type called Valve comprising of the above 4 bool elements. 2. In the graphics I made a image of solenod valve with one rectangle (solenoid) and one polygon for valve body. 3. Under the Faceplate Properties (See figure attached) I inserted a property ang gave it the data-type Valve as above. However, when I drag a property from the 'Contained objects list' to the interface side, it is not getting substituted. such as the Rectangle_1 's background color I try to associate with the interface property Valve.Cmd. It does not get assigned when dragged. Since this does not work I tried another approach, Method -2 I attempted to declare a variable tag of UDT type 'valve' in the faceplate's tab Tags. I found that it is not possible to declare a local variable of User-defined types here. Please guide me how to proceed. Thanks for looking in and best wishes for your success. Regards, Raj S. Iyer

Hi friends, Can anybody tell me when to use a local-Static variable and when to use a Local Temp variable whilst creating a Function-Block in S7 -1500 using TIA portal. Thanks for looking in. Best wishes.

Jendha, Dobry Dehn. (The Slavic Dehn you use is the same as our Din in HIndi..) Good hindi, Actually I speak many languages though my mother tongue is Tamil in which I am illiterate! Actually, in my application I need only start/stop and speed control of pumps. Additionally, on SCADA/HMI I need to display the other things such as voltage and current. All said and done, I think using the technology objects and function blocks MC_power + MC_Movevelocity would be enough for the control of the pumps; For the display of voltage/current/power I think I have to configure a telegram on SW Starter/scout. There is another question that I've posted for you. Thanks

Jenda, Thanks a lot.. Since the time of posting, I have read further into the subject. As I understand, TIA portal has Technology functions for connecting to the VFDs on Profinet. These are called TO_AxisPosition and TO_AxisSpeed. The first one is for using the VFDs in positioning applications such as conveyors and the second one is for basic ON/OFF + speed control as is the case with my present requirement. It appears to be fairly straight forward... 1. We begin by dragging the appropriate model of the VFD into the network/topology view and connect it to the Profinet port of the selected PLC. For any given model of VFD, there are certain Drive-Objects or DOs that can be dragged into 'slots' of the VFD module. For basic speed control, the DO with standard-telegram 1 is sufficient. 2. Next, in the "Program Blocks" folder, we have to add the corresponding Technology-Objects such as TO_AxisSpeed. This Technology-object is associated with the telegram we have selected in step-1 3. In the PLC-program, we use the corresponding function blocks such as MC_Power and MC_MoveVelocity and associate variables to these blocks so that we can control the drive. I believe that this is all there to it. But since you are mentioning the need for parametrization of the telegrams, I will certainly look into it. And One last question.. How do you configure the variables for Voltage, current, power, torque.. etc from the drive on Profinet in TIA Portal? Thanks and Dobry Dehn,

Dear Friends, In my present project, I have a S7-1500 PLC & 3 Nos, Sinamics VFDs(PM-240s) with Profinet ports.(CU-240E -2PN) The drives and PLCs are on the same Profinet network. I wish to know the essentials of controlling the command and speed reference of these drives directly from the PLC on profinet. Reading the help in TIA portal got me nowhere its all about Telegrams and things that I haven't figured out yet Thanks for looking in; I shall greatly value all help and advice.