DanT
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Posts posted by DanT
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Hi;
There are limits to the number of -|P|- and -|N|- that can be used in a program - They also take up more processing time than a -| |- contact.
Aslo Review the Help Topics Contacts Postive Transition Contact(Rise) for further information.
If you have several -|P|- assigned to a single MB say MB11 - say you use it 6 times.
then do this -|P|- -( )- MB11 turns on MB12 do this at the start of the ladder
Now use -| |- MB12 in place of the MB11 -- does the same thing the leading edge pulse.( also saves scan processing time)
Also Examine your program as to why you are using so many of the -|P|- and -|N|- in your program.
You can also upload your program and some one can do a review and provide some suggestions to reduce them
DanT
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Hi;
If connecting via Ethernet, you also need the PLC Name and if the PLC was programmed using VisiLogic 9.9.00 - the security passwords.
Can you Ping the PLC Addess sucessfully?
DanT
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Hi Marko;
Are you using the Unitronics USB Cable USB2-CAB200? This has a Ferrite on it to reduce noise in the line.
If not, use a cable with a Ferrite.
Normal COM settings are 115 k Baud, 8,n,1
Check your PC Comprt settings - Control Panel - Device Manager
Check Comport settings on the PLC -- you can get this infor using Info Mode
Hold non active touch are on screen for about 8-10 seconds
follow prompts, - Enter Info Mode, password ( default) is 1111
Serial Communications - USB uses COM 1
Try communicating - there is a TX-RX that will index with communications, also, you can monitor the com line
Keep cables away from VFD lines and power lines
DanT
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Hi Tejasvini;
The differences between SI and MI
SI - System integers -- used by the PLC Operating system to provide feedback on system process
Also Date and time are here.
Gives status of Communications ( Modbus and Ethernet and so much more )
Basically most are read only for programmer to monitor and use in the ladder ( Date and Time can be edited)
Anything starting with S SI, SB, SL,SDW are system variables.
MI -- These are for you, the programmer to use in your progam as needed.
Aslo MB, ML, DW -- These are backed up by the Battery, so on power loss, data is retained ( There is an SB for Battery Status )
XB,XI,XL etc are scratch pad variables for the programmer to use - you don't care if these get wiped on power fail.
DanT
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Hi;
Linearization in the Screen Number box is limited. Applies to the Display Only. ( see Help)
We normally do the linearization in the ladder - more control over the settings and the Input and Output.
See ( Help-Lienearization-Vector Linearization)
DanT
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Hi;
Under Help, There are example programs to review.
Basically : Place a Number box on the Screen
Assign the MI for the Data to be entered
Set up the keyboard entry - add the limits for the data entry.
In the ladder, use the MI into a Linearization block to convert to the analog scaled output.
DanT
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Hi Ferdi;
M228 is a VERY OLD > 20 Years System, no longer supported.
Contact : Support@Unitronics.com for assistance with this product.
DanT
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Hi;
What is the device you are communicating with?
What is the data stream protocol? - how is it structured?
Appears to be a GPS device?
Are you requesing the data via a command or is the data send automatic
DanT
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Hi;
Memory Values can be backed up
Do this Before working with the OS
From VisiLogic:
Connection -- lower section - Just above communication and US
Export PLC Operands to Text file
or Export PLC Operands to Binary file.
Then do the reverse -- Import the values back in
DanT
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Hi;
Chances are the program was downl;oaded into the PLC without the Upload Option, or the Upload option requires a password.
There is no way you are going to get to upload the program from the PLC.
You will have to contact the HVAC manufacturer and see if they will release a copy of the program to you - chances are - NOT.
Are you able to go thru the menus provided to be able to change parameters? Are these sufficient?
What is the model of the PLC ? ( White tag on side of the PLC )
There is also Info Mode to get into some basic PLC( Not Program) Parameters.
DanT
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Hi;
Modbus TCP
Review the Modbus functions and Help( Index- Modbus and Modbus Slave Addresses) and Examples( Help, Examples, Projects, Communications, Modbus)
The SCADA programs are the Masters - asking for the data from the Unitronics as the Slave - responding to the request and sending the data
Set up the Weintek and Siemens for MODBUS TCP ( Ethernet) communications
Read thru the forum topics about SCADA and Modbus - the expiences and the wisdom provided.
DanT
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Hi;
The 10-ATS8 is not a Unitronics Part Number.
Are you refering to the Vision Series IO-ATC8 Analog Input module?
DanT
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Hi;
In VisiLogic, Hardware setup, when you define a High Speed Input, right below that is Frequeny Measurement,
select 100ms, 500ms or 1000ms , define an MI, and then create your tach using this data
DanT
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Hi;
0-10V Analog Input - the PLC takes the raw analog data and stores it in an integer ( MI) in the PLC memory.
If you are planning to do math with the number, then work in integers - a lot faster and easier for the PLC to process, you just have to keep track of the decimal position.
MI's are 16 Bit nimbers -32000 to +32000 roughly, or use an ML 32 bit numbers
Scientific notation ( Floats ) requires a lot more PLC processing time because everything has to be converted into interger math anyways by the processor during the process.
Displaying Integers with decimal point is easy as you know where it is and can tell the Number display how to display the number with the decimal.
( displaying floats is a bit more tricky as you have to display it as a string, not a number - more plc processing time.)
Floats eat up PLC Scan time -- cause it to be longer, Integer Math is faster and natural to the PLC Processor.
DanT
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HI;
Last Image diplays an important point -- Battery is LOW -- Change the Battery
Battery CR2450
Remove the connectors, then the back then the I/O Board.
Install fresh battery, reverese process.
Power up, check communications - COM 1 57,600.
Cannot communicate? screen works - use Info Mode to check COM settings.
Does your program modify COM Settings for a device? Have you changed them?
Battery Life -- typical 5-7 years - keeps RAM Alive when powered off !!
SI 7 Controls Screen Contrast on the V120
SI 9 LCD Backlight Intensity
DanT
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Hi
Contact support@unitronics.com for assistance
Some questons:
Did you set up any passowrds in the program?
Did you set up any communications parameters in the program?
What were these?
If possible, you can upload your program for someone on the forum to review..
Forum Moderators and contributors are not Unitronics Support Staff.
We are volunteers -- programmers helping programmers.
DanT
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Hi;
Contact support@unitronics.com for help on this one.
DanT
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Hi;
I consider "erase all the Data," as close to a factory reset as you(we) are going to get.
When the PLC's come from the factory they usually have a demo program installed in them.
We can upgrade or downgrade the OS in the PLC,and install our own Unilogic created programs - that is as far as " the creators " will allow us to go.
DanT
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Hi;
To Expand a bit on Joe's comments.
JAZZ - U90 Ladder does not have the type of tables you are looking for.
You can saythat all MI or all MB are a table, but you are only in some tiny portion .
You can read MI's and MB's individually , but many Modbus calls will be required to grab the data individually
When there are several to be read or written to at one time, then Group them into a specific range of MI or MB
so 1 Modbus call will read the range or write the range ( so consider this range as the table)
If your program has the data all over the place, you can use the Store commands to put or read the data in the range for Modbus Read / Writes.
( do reads at the beginning and writes at the bottom of the ladder)
DanT
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Hi;
If you can communicate with the PLC ( Etherent or USB)
The create a BLANK or Minimum Program ( Ladder and HMI)
On HMI I just do a Text Message and a Clock
In Ladder I do nothing
Set up the Model info, and the Com's
PLC Communications
Physical - IP Address Information Panel IP is important
Compile and Save the program then Download
This will overwrite everything - erase the old program and its setupand install the new program with new program settings.
If you cannot communicate with the PLC, then you need an ACTION file to "kick" it.
Create a dummy program as per above and save it.
UniLogic, Tools - Icon Ribbon- USB ActionFiles Creator ( you will need a USB Key
Follow the steps Data - uncheck All
Logs - uncheck All
Updates -- You decide
Communication -- Write new parpameters into the Panel IP date CPU and DNScan be blank at the moment
VNC Passwords -- You decide
PLC Password -- Use Unitronics factroy default password
Save
Follow steps to load onto the USB, then plug into the PLC and power down the PLC and power back up Action file will do its thing.
Then ping the IP Address and go online -- UniLogic and VNC
DanT
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Hi;
Wow, 3 Hams.
Nice solution Joe.
My Call is VA3LDE (Ontario, Canada)
DanT
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Hi;
Are you actually using a Quadrature Encoder? If so, then the Input is on IN0 and 1 and set for a High speed Counter.
IF the sensor is the only thing sensing the target, then you have to know that you are going CW or CCW - you need these signals
To Count up -- CW Signal + Target Signal = Increment Pulses
To Count Down -- CCW Signal + Target Signal = Decrement Pulses
The Home prosition sensor can be center and reset the counter to keep it in synch as the antenna rotates thru this position.
I have an Amatuer Radio License, but not a tower, but this is kinda the approach I would take :
Sensors - Sense the gear or position of the Rotor shaft.
- Center position
- Possible sensor at each end of the rotor travel as limit sensing with Auto Stop of motion when reached - regardless of the Count.
- Linearization to convert Pulse count to Degrees,
-- Have 0 degrees at the center home position and go + 180 and -180 from Home
I would shy away from using an encoder - expense, coupling the encoder and weatherproofing since it will be outdoors.
Post your program.
I did a CAT program using a Unitronics PLC to control a transceiver.
DanT
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Hi;
A Note from Experience.
A SAMBA PLC has Limited Memory !!
When Adding Unitronics VFD Functon blocks to a SAMBA, it takes up a lot of that available memory and leaves only a small amount for actual application programming.
User program will have to be very small.
( In our case, customer ended up using Small UniStream PLC to handle the program and the VFD)
DanT
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Hi;
The Adapter in the image is the older EX-A1, and the cable was the EX-CA100 -- not polarized.
If the Adapter was changed to an EX-A2X, then the EXL-CAB100 must be used, as it is "polarized" and ends are labeled PLC and Adapter.
DanT
How can I use Memory bits (Merkers)?
in UniLogic Software
Posted
Hi;
In UniLogic there is no pre-defined memory bit structure.
All individual Variables are defined as tags.
When you create and define the tag, you select what is is - Boolean( a Bit) Byute, Integer, etc.
So you create the Memory Bits.
You can create arrays of Bits, or use Bits in Structs, and more.
Under System Tags you will see system "tags"( variables) defined as Boolean(Bits)
In VisiLogic and U90 Ladder -The memory structure is rigid and there are specificly defined Memory Bits - MB0- MBxx.
UniLogic is much more flexible in how tags ar defined.
DanT