RS-232 Resources for TestEquity Chambers

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

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).

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.

RS-232 Troubleshooting Tips

We receive many calls each week regarding RS-232 communication issues. There are several issues which must be addressed in order to communicate successfully with the chamber. With thousands of chambers in the field, we have never had a verified case of a bad serial interface in the controller. Click here for RS-232 Troubleshooting Tips.