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TestEquity chambers use programmable controllers which are manufactured by Watlow Electric.

LabVIEW Drivers for RS-232
LabVIEW_RS232.zip (15M) provide the ability to communicate with the Watlow F4 Controller used on TestEquity chambers using National Instruments LabVIEW over the RS-232 interface.

These LabVIEW files were developed for TestEquity by LabVIEWexpert.com. LabVIEWexpert.com is a leading National Instruments Alliance Member, supplying custom test software solutions to hundreds of customers worldwide. The company consistently provides “Low Risk Software Solutions to High Stakes Automation”. If you would like assistance with your LabVIEW project, please visit them at www.LabVIEWexpert.com.

Watlow Comm7 Utility Software
Comm7 (2.6M) is a Windows-based diagnostic utility created by Watlow. Comm7 can be used to upload/download controller configurations or log data to a text file via RS-232. Included in this download are files to restore the setup of F4 controllers back to the configuration as shipped from TestEquity.

Visual Basic Programming Examples from Watlow
Example of Communications in Modbus RTU Using Visual Basic, WatlowMB.zip (23KB).

Watlow Data Communications Reference
Electronic User's Manual, WatCDCE_A.pdf (522K).
(see applicable references to F4 Controller and Modbus)

Sample 16-bit Modbus Packet
Modbus_Packet.pdf (209K) illustrates sample 16-bit Modbus packets to write a temperature set point and read the actual temperature.

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