Please read the following instructions carefully before downloading your software.

To make sure that the W600 upgrade is appropriate, go to the Configuration Settings menu, scroll to Controller Details, enter, look at the Product Name and only use an upgrade file that matches the Product Name. To determine the software revision on your controller, go to the Configuration Settings menu, scroll to Controller Details, enter, and scroll down to the Control Board Software version. The latest version is 4.23. Do not perform this upgrade unless the version on your controller is 2.01 or higher.

Upgrading the software on your W600 controller is easy! All you need is a 32MB or larger USB flash drive. (Please note: 16GB is the maximum supported size)

New Features from the Latest Upgrade

  • Improved the ability to read BACnet packets when they are sent at high rates
  • Fixed an issue with the Default SSL certificate generation

Always upgrade to the latest version for the greatest reliability! We are continuously improving the W600! Here are the features we have included lately. Please note that if you have an early revision of the software, you may only update to the latest revision, not to any intermediate revision.

Version 4.23

  • Improved the ability to read BACnet packets when they are sent at high rates
  • Fixed an issue with the Default SSL certificate generation

Version 4.21

  • Added protection against brute force password login attacks, locking out login after five failed attempts
  • Decreased the maximum allowable network timeout to 240 minutes. Controller data will continue to update in view-only mode as long as a webpage remains open
  • Require a strong password for all network users
  • Improved the encryption of passwords in the browser
  • Fixed an issue where process calibrations via the local touchscreen are possible with security enabled and the user logged out
  • Fixed an issue where data logs download links did not expire
  • Several other security improvements

Version 4.19

  • Fixes an issue in v4.17 where controllers containing the old Ethernet board (June 2020 or earlier) stop sending data to Walchem Fluent
  • Use this upgrade for all controllers running v3.39 or earlier
  • Not necessary for controllers running v4.17 that contain the new Ethernet board or don’t send data to Walchem Fluent

Version 4.17

  • Option to encrypt LiveConnect
  • Encrypt Fluent data packets
  • Improve how many decimal places are shown based on conductivity cell constant and units
  • Increased number of decimal places for Fluorometer analog input types
  • Fix Live Connect login failure using iPhone
  • Fix networklog download failures when using certain browsers
  • Match software version numbers with Intuition

Version 3.39

  • Encrypted webpages
  • Added Repair Network File System menu
  • Increased range of electrodeless conductivity cell constant
  • Fixed an issue with BACnet subnet mask when using DHCP
  • Fixed an issue with flowmeter rate and conductivity units in Spanish and Portuguese languages

Version 3.37

  • Changed the upper limit for pulse relay output maximum rate to 2400 pulses/minute
  • Changed the upper limit for the feed percentage in the Bleed then Feed control mode to 1000%
  • Added all new disinfection sensors to the menu list when setting up these inputs.
  • Numerous network reliability and security improvements.
  • Added a new email server type selection for “Walchem Fluent Email”, using preloaded SMTP IP and Port.
  • Fixed an issue with Graph Reports sometimes not having the mouse-over feature in the attachment.
  • Fixed an issue where the network card restarts when generating Graph reports.
  • Increased size of the ASMTP Password field
  • Fixed an issue where the remote calibration window did not work in French.
  • Increased the number of digits shown using engineering notation for flowmeter totals greater than 10 million.

Version 3.35

  • This is the first upgrade that will be available remotely over Ethernet. The software upgrade link will appear only to users with Admin login, and only if the controller has access to the Internet with TCP port 9013 open inbound and outbound and the controller software is currently at version 3.31 or higher, and the software is not at the latest version available. The hardware to support remote software upgrades is only available in controllers with front panel controller boards built after June 12, 2018 (rev. D). Please note: The upgrade process takes a minimum of 30 minutes depending on your connection speed.
  • Improved software filtering of noise on flowmeter and counter type digital inputs
  • Improved touchscreen noise rejection on power up that can cause false software upgrade attempts
  • Improved reliability of the remote process calibration
  • Improved webpage performance on mobile screens
  • Added Counter Timer and Flow Meter Ratio algorithms to Pulse relay hardware outputs
  • Increased the frequency of retries if packets fail to be sent to Walchem Fluent ™
  • Fixed an issue with data packets sent to Walchem Fluent ™ for controllers with no sensor channels assigned
  • Added email report configuration to the list of fields in User Configuration Files. This does not include SMTP server settings or To and From email addresses, only the report settings.
  • Fixed an issue where User Configuration Files created from controllers using v2.07 or earlier fail to import with a Flash Error message
  • Increased the number of decimal places for the total of DI Counter inputs to equal that of the Units/Pulse setting
Version 3.33
  • Fixed some issues with the v3.31 upgrade which was not compatible with some combinations of sensor and Ethernet option card versions

Version 3.31

  • Added On Delay and Off Delay settings for relays using Alarm Control Mode
  • Added Alarm Suppression based on the state of Digital Inputs
  • Added Korean language support
  • If alarms are suppressed, then datalogging is also suppressed
  • New Dual Switch Control Mode
  • New Flowmeter Ratio Control Mode
  • New Digital Input Counter input and Counter Control Mode
  • Fractional Units/Pulse in Counter Control Mode with the number of decimal places determined by the High Alarm setting
  • In conjunction with an improved Ethernet option board;
    • BACnet capability added with installation of the Modbus/BACnet key file
    • TLS/SSL email support
  • New Notepad webpage
  • Improved webpage responsiveness to smaller device screens
  • Modbus and BACnet key is now retained through a Reset Defaults command
  • Remote One-Point Process Calibration over Ethernet
  • Remote Software Upgrades over Ethernet
  • Remote Configuration File Import and Export over Ethernet
  • Option to attach a System Summary file to Alarm email reports
  • Choice of Light or Dark webpage color schemes (upon upgrading to v3.31, the Light color scheme will become the default)
  • Added the ability to easily send a Test Email to help verify email settings
  • System Log now captures the IP address of devices connecting over Ethernet
  • Enhanced Password Security
    • Complies with new regulations banning identical default passwords
    • After upgrading, on first login the user will be prompted to change passwords
    • New controllers will use the serial number as the unique password, not the same password for all controllers
  • For WCU and WNI controllers
    • Added the ability to manually set the current number of metal turnovers
    • Increased number of decimal places for the metal turnovers
Version 3.25
  • Fixed an issue where false file system error alarms are reported in the System Log
  • Added a hard-coded 60 minute time delay for reporting VTouch communications and Live Connect alarms. Short term failures will still be captured in the System Log but will not generate alarms unless the condition persists.
Version 3.23
  • Changed the color of the Min, Max, Average lines in the webpage graphs to improve visibility
  • Modified copper/nickel sensor error handling to match W400 series
Version 3.21
  • New logarithmic generic sensor type for use with Ion Selective Electrodes
  • New Graph type email report
  • Improved Graph webpage to allow custom setting of the Y-axis scale
  • Increased the maximum alarm delay time for email reports to 24 hours
  • Improved anti-windup in PID control modes
  • Improved reliability of the network card file system
  • Added two decimal places to Flow Proportional control mode set point to allow for smaller values
  • Modified Time Proportional and % Timer control modes so that set point changes take effect immediately instead of at the next time cycle
  • Improved response time when using a duty cycle in On/Off control mode
  • Fixed an issue where the controller doesn’t resume control in intermittent sampling if a calibration is started but never completed
  • Fixed an issue where using the Smoothing Factor for disinfection or pH/ORP causes an offset in the reading.
Version 3.19
  • Fixes an issue with a false “Calculation Error” alarm that can happen on a Relay 2 Flow Timer output
  • Fixes an issue where abandoning an Intermittent Sampling calibration can disable control
Version 3.17
  • Add logo, controller name and location to all webpages
  • Adds new virtual input type to log or control on a sensor’s Raw Value
  • Removed exponential notation in datalogs
  • Immediately show new conductivity value after a calibration when using Intermittent Sampling
  • Add high and low alarms for Paddlewheels
  • Can now read temperature sensors even if the primary sensor is disabled
  • Analog outputs forced to 0 mA during the boot up period
  • Fixed an issue where Hand and Auto Output Timeouts interacted
  • Widened the WCU/WNI sensor fault alarm range to prevent false alarms with long cable lengths
Version 3.15
  • Adds support for up to 8 parameters on the Home screen
  • Adds links to the manual, Walchem website and VTouch from the Home webpage
  • Spike set point algorithm enhancement to optionally start spike timer only after set point is reached
  • Adds Flow Proportional control mode
  • Adds an auto-dim option for the display backlight
  • Adds a TCP Timeout setting to improve reliability of slow cell connections
  • Adds an alarm delay during power up initialization period
  • Adds the custom name of the relay selected on the HOA screen
Version 3.09
  • Adds a new OEM software version
  • Adds a new feature to an existing OEM software version
Version 3.07
  • Fixed an issue where the pulse proportional control pulse rate could be twice the expected rate.
  • Fixed an issue where the conductivity reading displayed is not updated immediately following boiler intermittent sampling if trapped sampling is disabled.
  • Fixed an issue where resuming control is delayed for several seconds after a biocide bleed lockout or probe wash hold time of 0.
Version 3.05
  • Fixed an issue where an On Delay or Off Delay can stop before the programmed amount of time
Version 3.03
  • New Feed Monitor digital input type
  • The feature where a biocide or timer event can be selected to occur immediately after an interlock clears has been re-named from “Interlock Delay” to “Add Last Missed”
  • Conductivity-based biocide prebleeds will now be forced to have a time limit also associated, so it’s no longer possible for the prebleed to last forever
  • Added an Air Calibration for contacting conductivity sensors to improve accuracy
  • Modified the % Timer algorithm so that a new cycle starts if the sample period setting is changed
  • Fixed an issue in W600 where Web Server Failure alarms are not cleared from the display after the alarm is cleared
  • Fixed an issue in the W600 where too many timer events can result in a reboot
  • Increased the maximum setting allowed for the paddlewheel K factor
  • Fixed an issue in Timer control mode Hourly event repetition settings changing after a restart
  • Fixed an issue where a Flow Timer control output can stop accumulating feed time if interlocked by another output
  • Fixed an issue with PID control mode if the input is paddlewheel or virtual input type
Version 3.01
  • New combination Sensor Input and Analog Input board that add even more flexibility
  • Modbus/TCP communications
  • Graphing capability is now extended to web pages as well as the local display
  • Two Virtual Inputs that are calculated from two real inputs (cycles of concentration, % rejection, etc.)
  • PID control using Pulse or Analog outputs
  • On and Off Delays added to some control algorithms
  • Lead/Lag control of up to 6 relay outputs
  • Intermittent Sampling for boilers without using a trapped sample
  • Added a 2nd flowmeter input to the Feed Timer control algorithm
  • Antimony pH sensor support
  • Ability to restore default settings
  • Chinese and Taiwanese languages
  • Ability to choose to feed the last missed Biocide after an interlock
  • Ability to set the flow total to match the meter’s register
  • Total support for eService Reports
  • Modified Bleed/Feed and % Timer algorithms so a feed cycle doesn’t begin immediately after and interlock clears
  • Improved system stability
  • Improved sensor speed of response
Version 2.11
  • Fixes a problem in 2.09 where Flow Based Feed will not occur after an Interlock is cleared
  • Fixes a problem in 2.09 where Intermittent Sampling doesn’t operate the control valve correctly
  • Fixes a problem in 2.09 where the Minimum Relay Cycle time that is used with motorized ball valves is not used correctly
Version 2.09

This software upgrade improves performance and reliability of several existing features:

  • Decreased the time required to download log files
  • Improved the speed and reliability of VTouch Live Connect
  • Improved the speed and reliability of all Ethernet communications
  • Improved the reliability of the graph generation on the local display
  • Improved the reliability of configuration file imports
  • Corrected a problem loading the Display Settings menu that can occur when all possible inputs are being used
  • Corrected a problem where the analog output status can be incorrect
  • Improved webpage by eliminating expanding and collapsing links when hovering over them
  • More System Log messages to improve diagnosis
  • Improved handling of time changes in the graphs and data log files
  • Improved accuracy of timers
Version 2.07

Adds support for:

  • Sending emails (alarm or datalog) directly from the W600
  • LiveConnect to W600 via VTouch
  • Control based on paddlewheel flowrate
  • ORP Spike control mode
  • Duty cycle with on/off control mode
  • Easier biocide, industrial timer and probe wash programming
  • Ability to download data since the last time data was downloaded, plus more flexible log lengths and time between data points
  • Calibration reminder
  • Automatic reset of flow total (daily, monthly, annually)
  • Totalize time that a digital input (like a flow switch) has been open or closed
  • 4 parameters on the Home screen
  • Delay alarm notifications on system startup
  • Improved Ethernet connectivity
  • Fixed pulse proportional control output going below the minimum setting
  • Fixed issue with changing modes from webpages when using French language
  • Reduced low limit for temperature sensors to -20 C, -4 F
  • Disabled the Home screen timeout during log file transfers
Version 2.05

Adds support for:

  • Automatic buffer recognition for pH calibration
  • Three point buffer calibration for pH sensor
  • Probe wash relay control mode
  • Damping/averaging on sensor and analog inputs
  • User-adjustable conductivity automatic temperature compensation %
  • More flexible alarm relay control mode, able to select specific alarms that trigger the relay
  • Increase paddlewheel rate to 500 Hz.
  • Improvements to intermittent sampling calibration, and calibrations in general
  • Reset default calibration
  • Suppress sensor alarms during No Flow
  • Improvements to Ethernet connection stability
Version 2.03
  • Adds support for a Generic type sensor for use with any sensor that has a linear voltage output between -2 VDC and +2 VDC. Adds two new analog input types, one for a Fluorometer Input for use with the Little Dipper 2 sensor, and one for Transmitter for use if the device connected cannot be calibrated on its own and the W600 will need to be used to calibrate in engineering units of measure. The existing Generic AI type will be renamed AI Monitor. Adds adjustment to the brightness and contrast of the display. Adds the current day of the week to the Details screen for Biocide Timer and Timer control modes. Adds a menu to cancel the remaining feed time when using Bleed Then Feed control mode. Adds a new page of special characters, mostly Greek, available for text entry in all languages. During calibrations, the sensor reading will now be displayed and the user may force the calibration to completion if the value is not sufficiently stable for the controller to continue on its own.
Version 2.01
  • First released software version

Upgrading the software on your W600 controller is easy! All you need is a 32MB (or higher) USB flash drive. All you need is a 32MB or larger USB flash drive. (Please note: 16GB is the maximum supported size) Click to download files:

  1. A dialog box will open, asking if you want to save or open the file. Choose “Save As”. In XP and Vista, save it to your desktop (this makes it easy to find). In Windows 7, 8 or 10 the file is saved in your “Downloads” folder.
  2. In XP and Vista, double click the file on your desktop to unzip the file. In Windows 7, 8 or 10 go to your Downloads folder and extract the file (you will normally have to right click on the file and select “Extract All ”). Drag the extracted upgrade file to your desktop.
  3. Plug in your USB flash drive. The drive window should open. If not, go to “My Computer”, and open it (should be “Removable Media” drive).
  4. Drag the file named W**W600-v4_23.bag to the USB drive. (Make sure that the Upgrade file is the only file on the drive. The ** will be the Product Name of the file you selected.)
  5. Unplug the USB flash drive from the computer. Now you can upload it to your controller.

Note: If you have issues with the Ethernet network circuit, you may need to run an upgrade to get the card back in sync with the controller.

Note: If you added an older Sensor, Analog Input or Analog Output card to a controller with newer software, you may need to upgrade the I/O card software (Latest I/O software version is v4.23).

Upload the file to your W600 Controller:

  1. Plug the memory stick into the USB Host connection outside the controller’s front panel, located under the waterproof cap on the lower right-hand corner.
  2. Go to the Config Menu, touch the Down arrow to scroll to the last page.
  3. Touch File Utilities then touch the Down arrow to scroll to the last page.
  4. Touch Software Upgrade.
  5. Touch the Check (Confirm) icon to begin the upgrade.
  6. The controller will display the progress of the file import process. Leave the memory stick in place. If successful, the controller will automatically reboot and the stick may be removed.