Recent content by apps_man

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    Baseboard heater control set-points.

    Thanks for the feedback. A technique of using a dead-band is a much better solution. I will program a combination of a short "de-bounce" timer to "qualify" the dead-band range for control.
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    Baseboard heater control set-points.

    I have a question regarding home heating control and set points for electrical baseboard heaters, ON or OFF. I am programming relay control for the heaters using RTDs to monitor the room temperature. To avoid excessive relay actions, I welcome suggestions for time LT setpoint before activating...
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    MODBUS transmission limits???

    Modbus is a "protocol" that can be implemented on RS232 or RS485 or EtherNet. A quick search results: Modbus is an application layer data protocol present at Level 7 of the Open System Interconnection (OSI) model of communication. It provides a connection between servers and clients located...
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    VijeoDesigner 6.2 modbus IP reading script error

    You may already be aware of this but the one (or two) IP addresses assigned to the HMI are easily accessible by using System Varialbles. I use this to display the IP address(es) of the HMI on a screen. Configure a "String Display" object on a screen using the variable...
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    Unity Programming for EHC105 Counter

    My clients system is Schneider M580 Control Expert (Unity)V14. This is a large distributed remote IO system. Currently our scan time is 5 mSec. We have installed and configured several pulse count inputs using Quantum ECH 105 modules. The control/reset/reading is all via software. We are not...
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    Unity Pro Loop Drawings

    Looking for actual experience references for a software that will printout module wiring drawings with reference tag name and reference address from a Unity Pro XML database. If you have experiences with doing this, please let me know what software you used and its ease of use. Thanks
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    Schneider Electric Software and Windows 10

    New PCs all come with Windows 10 OS installed. I am looking for success stories where people are running Unity Pro V10 and/or Vijeo Designer V6.1 on Windows 10 PCs. Thanks
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    Log and Display Historical Trend on a PC

    My customer wishes to log some data values from a PLC via MODBUS TCP. The data is only valid when the associated valve is open. Logging data every one (1) second. The valve is open between 5 and 30 seconds at intermittent times. The times between data logging can be several hours. Data logging...
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    Modbus Terminators

    Your issue may be with the physical network. I suggest that you go to B&B Electronics www.bb-elec.com and get their white paper on RS-485 Troubleshooting. Loading, distance and even the use of a terminator are factors that can "compromise" a network. Mike Fahrion of B&B has written several...
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    Looking web based HMI that has Modbus

    The Schneider Electric Magelis HMI with Vijeo Designer software provides serial and ethernet communications using the most common and accepted protocols. Once you have configured and tested local HMI control then remote access is simply enabled in the software. The software/hardware comes with...
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    (Slave device) MB ---- BM85 ---> MB+ (Quantum, NOM)

    Go to a Schneider web site and download the BM85 manual. There is very little setup required for the method you are using. In the controller program, use the MBP_MSTR function to address first the BM85 and then the port (serial port) and then the slave device. example, slave device 1 on port 3...
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    modsoft /E984-785 generated error codes

    Proworx 32 will run on Windows X and Vista Business Edition and on a P4 PC. The PW32 manuals list some error codes. I have a list of most Modsoft error codes. Post your email address and I will send them to you.
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    Upgrade Plc & Software.

    If you want to continue using a legacy processor like the 785E, then the only solution is to upgrade your software to ProWorx32. If you are willing to upgrade the hardware, then consider moving directly to Unity and using a new Quantum processor. This will enable you to take advantage of new...
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    modbus communication cable

    DB9 to DB9 on the PLC? or DB9 to RJ45 on the PLC? Need to know. Typically, for Modbus communications. 2-3 / 3-2 / 4-6 / 6-4 / 5 - 5 / and 7-8 loopback both ends. Because of the loopbacks, a "standard null modem cable does not work.
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    HMI on Genius I/O LAN

    I am investigating a situation where a user wants to connect a Magelis HMI directly to some Genius I/O blocks.. I am beginning to think that this is not possible without a gateway device. Looking for anybody who has done this with Magelis or Proface devices.
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