AlexUT

Hi Isakovic, I hope you are working with Vision PLC, as your post is in "Vision PLC series and VisiLogic" . May be I lost where you posted project file, but virtual explanation will not always helps. Post your project and we will have full picture. 1. Large/complicated Nets, or use number of rungs in one Net. In most of cases this will lead to problems, and you cannot find where the problem starts. Just split rungs and complicated Nets. 2.Calls to subroutines, or jumps, from complicated nets. In most of cases leads to problems. 3.Transition contacts. If you have the same transition contacts - replace all by one regular coil, which will be activated by one transition contact. Many other things will be involved. You say "There are a lot of transition contacts in program and couple of strange bugs that happen "sometimes". Program wouldn't even work until I broke big nets into more simple ones (I learned that this is good practice the hard way). Your example does show that there's something strange with using transition contacts, it also gave me an idea to try. " Analyse STL, as DanT recommended, will show you how really Ladder compiled to code. If you post your project as-is, it will be simplest to show you where potential errors may happen.

Hi kikitron, for 10000 rpm (when 1 pulse per rotation generated) maximum frequency is 10000/60=167.7 Hz. Any model of V430 can count pulses. Some PLCs have max. input frequency 200 kHz, others - 30 kHz. B.R.

Hi Dekata, Please send "impulse drive" documentation to support@unitronics.com We will review it and answer you. B.R.

Hi, Low-pass filter in Ladder is more like to DSP (Digital Signal Processing), which require special hardware module, or lot of resources. Some PLCs have a Filter option in Hardware Configuration, and other PLCs can use Filter option from FB's Menu. Please look an next link from Control Engineering: Ladder logic 402: Data manipulation and filtering. Frank Lamb. http://www.controleng.com/single-article/ladder-logic-402-data-manipulation-and-filtering/e589114a10276058909584cea125cbcf.html Please remember, that conversion time for analog inputs will be number of system scans. B.R.

Hi hotwires, There are 2 examples of time synchronization, for V570 and V700. Both are located in Examples directory": C:\Program Files (x86)\Unitronics\Unitronics VisiLogic_C\Examples\Version 900\Project examples\Communications\Ethernet Daylight Savings Time cannot be automatic updated, as it changed from time to time. You have to take care to decide, when to change DST. Rest is done by RFC-305 FB and some logic. The same is for sync intervals. You have to select applicable for your project sync intervals. If you have a specific requirements for your project, please send us project potential evaluation with detailed requirements description, and we will pass your requirements for evaluation. B.R.

Hi REGEX, Adapter, you use, based on FTDI chip. :Chipset: FTDI" This chip is supported by Windows, but not supported by UniStream. To connect and use Cinterion EHS6T modem with UniStream, you have to use USB-to-Serial converter, based on Prolific chip. Unitronics supply such converters - Sunix USB to RS232 adapter model UTS1009B. This cable has been tested by us and clients and it works. Please see following link: http://www.sunix.com/en/product_detail.php?cid=1&kid=4&gid=14&pid=1136 You can use similar , Prolific chip based converter.

Hi Nicolche, Yes, VisiLogic does not allow to use PTO in an Interrupt Routine. What are requirements for servo (do you mean stepper control by PTO?): -Is a knife movement one direction, or both directions? -Does knife, one time activated, cut and return to initial position, or it should be returned by opposite direction movement? -How long knife may stay at end position? -Can you use "High Speed Outputs (Stepper Control)" from Hardware Communication settings? You can send all details to support@unitronics.com. B.R.

Hi, Such mess with an IP settings. To eliminate this, always do SOCKET INIT. Then you will have much less problems. B.R.

Hi MattP_Mac, 1.Make ping from your PC to PLC IP. Does PLC answers? 2.Open DOS prompt at your PC and enter "telnet 192.168.1.10 20256". DOS display will blink, clean and stay black. Is this what you see? 3.Enter PLC info mode and check Socket 1 status. Is it connected? Share test results. B.R.

Hi Paul J, IP address you use is from private address space. It is not accessible direct from the Internet. It can be accessible only from the same network. If this IP address after router, you have to make port forwarding at router to access this PLC from Internet. B.R.

Hi Paul J, Tell me your PLC IP address (send it to support@unitronics.com) and I will check connection by Modbus application.

Hi Paul J, Use next example for MODBUS TCP Slave: C:\Program Files (x86)\Unitronics\Unitronics VisiLogic_C\Examples\Version 900\Project examples\Communications\Ethernet\Ethernet MODBUS IP\V280_Ethernet_TCP_MODBUS_IP_Slave.vlp This example include all required functions.

Hi, Please send email with PLC SN, used VisiLogic version, and problem description/display snapshot to support@unitronics.com B.R.

Hi oferyosef, Projects, developed in U90Ladder, are very different from projects, developed in VisiLogic. You have to do manual conversion for your project.

Hi, PTO is not intended to manage endless movement. If you have to work without target, use PWM. In this case you have to program acceleration and deceleration in Ladder. You do not need PTO for this. B.R.

Hi Vamalgise, I recommend to make simulation at your office. Use the same provider's SIM card, and the same modem model. Then you can trace online hot SMS was sent, and what are statuses. There is a "Send Fail Bitmap". explained in "Help->SMS Operands". In office it will be simplest to find where the error is.

Hi Declan, How exactly do you clone?

Hello Vidmas, After 6 year some elements of PID loop will have degradation. PID FB is a piece of software, keeping all PID parameters in linked MIs and MBs, and in block of 32 MIs. Once you run PID Autotune for the first time and satisfied how it works, you have to save PID parameters for feature reference. If PID cannot work stable, in most of cases you have to check other PID loop elements. I recommend you to check all equipment in PID loop - sensor, actuator, etc. Do you use Analog, Digital, or Relay output for PID output (CV, or Control Value)? You can completely clean POD parameters by cleaning linked MIs, MBs, and block of 32 MIs. Than you have to run PID Autotune again. I hope this helps.

Hi Rhino, Please put all blocks in chain into one net and energize from SB2. Write to SI 140 should be last in shain. Does this fix problem? *Not only '/' will switch COM port to 7, E, 1. It may be BREAK signal from weight. If you continue to have problem, send your project to support@unitronics.com for review. Unitronics have a new site - http://unitronicsplc.com Wisit it and provide us your impression. B.R.

Hi, It will be due to different internal impedance. There are different V130 models with different input impedance. V130 -TRA22 have an input impedance 4.5 kohm for I 0 - I 1. V130-T38 have an input impedance 3 kohm. EXF-RC15 have an input impedance 4.5 kohm for I 0 - I 5. So it is dependent of V130 model you tested. For sensor with NPN output you have to use pull-up resistor. B.R.

It is dependent of minimum pulse duration from sensor. As shortest is minimum pulse duration, as less should be resistor. I recommend to start from 5.1 kohm. Current will be 24/5100=4.7 mA. Check it with minimum pulse duration from sensor.

Hi, Google say: 1 Radian = 57.2958 Degree. Then 0.017453 Radian = 0.9999832398418258 Degree (~1 Degree). Use this in your formula. B.R.

As I see from Quick Start Guide, outputs are PNP or NPN. So you have to use pull-up/pulll-down resistor. http://info.bannerengineering.com/cs/groups/public/documents/literature/177900.pdf Additional to this, you have to connect input terminal 10 (n/p) to either 0V or +24V - configure inputs as PNP or NPN, in accordance to used encoder. This will eliminate disturbance if one input to other. B.R.

Hi Arbellah, You have to connect input terminal 10 (n/p) to either 0V or +24V - configure inputs as PNP or NPN, in accordance to used encoder. Than any configuration should work. What is an encoder model? What type of output have shaft encoder you use? NPN, PNP, push-pull? In my case it works fine with push-pull encoder I have.

Hi Pawks666, Jazz use the same UART (hardware) to work with both, RS232 and RS485 interfaces. You cannot use both interfaces at the same time.