VersaPro Temperature Controller
Page 59
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19
Versapro Monitor Mode
The Versapro’s internal EEPROM can be reprogrammed when placed in Monitor Mode. This mode allows the
user to perform checks and set default conditions in the instrument by using a RS232 to RS485 converter and
the popular Windows
program HyperTerminal
. It is necessary to enter this mode when a CPU has been re-
programmed or if a checksum fault has occurred in EEPROM.
The user can also use advanced features of Monitor Mode such as status check, read RAM and FLASH
memory, write to RAM memory, load FLASH defaults to RAM, load EEPROM defaults from RAM to EEPROM,
or write from EEPROM into RAM.
19.1 Prepare for Connection
Make sure you have recorded all the operational parameters of the instrument before you change the
EEPROM values. These parameters will include the thermocouple type, alarm functions, and probe care
settings. For the controller version of the Versapro this will also include control and PID settings as well. Note
the instrument calibration settings for the two analog output channels by going into the SETUP mode, selecting
CAL OUT – Yes and recording the offset and span values shown for each channel. Advance to the each
parameter by pressing the <Enter> key. Press <Setup> to return to the process mode.
19.2 How to Connect
The Versapro has a RS485 half-duplex port located on terminals TB-B 13 and 14, where 13 is the +RS485
connection and 14 is the –RS485 connection.
Insure your converter is plugged into the serial port of your computer. Insure that your converter is configured
as a half-duplex (two wire) output and not as a full-duplex (four wire) output.
Apply power to the instrument and observe that it is operating in normal process mode where the process
name is displayed in the center LCD display.
NOTE
Your version of HyperTerminal may be different then the steps outlined in this procedure. The basic
information provide here will apply to any configuration. Accept the setup defaults if you are not sure about a
specific feature that is not addressed here.
When HyperTerminal starts up it asks for a name of a new connection. Enter a name that you can associate
with the Versapro setup.
The ‘Connect To’ window will then appear.
Make the following selections in the Connect To window;
Connect using: (select the comm port the RS485 is connected to)
Press the ‘OK’ button.
In the ‘Port Settings’ window that appears next, make the following selections;
