TEMPTRAC INTERFACE GUIDE, GATEWAY SETUP AND POINTS LIST
Page 3 of 30
PV7069-T 03/17
Part number 129209
TempTrac Heater MODBUS fixed settings:
Most of the MODBUS RTU and Port settings are not adjustable
Baud Rate: 9600bps (Not adjustable)
Data Length: 8 bit
(Not adjustable)
Parity: None
(Not adjustable)
Stop Bits: 1
(Not adjustable)
Start/Stop: Silent interval of 3 characters minimum
Minimum Time Between Retry: 500 msec.
Maximum read command is 5 words
Steps to change the TempTrac MODBUS address:
Editing parameters should be done without any device trying to communicate through the MODBUS port.
To avoid interference from a gateway or BAS, you should unplug the MODBUS adapter port on the back
of the TempTrac at the white header, while making changes to the TempTrac parameters.
The first step to interfacing with a TempTrac or group of TempTracs will be the assignment of the address
number for each boiler. The default for TempTrac is Address #1. You can assign any number in the range
of 1-247. This is the limitations of the MODBUS RTU standard.
The MODBUS address is the
Adr
parameter, and it is in the
Pr2
menu.
Enter the Programming mode by pressing the
SET
and
DOWN
key for more than 3 seconds. (Lead with
the
SET
key.)
Pressing the
DOWN
key, parameters will display in top, and value in bottom.
Select
Pr2
/
PAS
(parameter / value), and press the
SET
key.
The lower display will show the value
0 - -
with a flashing zero.
Use
UP
or
DOWN
keys to input the security code in the flashing digit; confirm
each digit by pressing
SET
. The security code is
321
.
After hitting
SET
on the last digit, you will be in the
Pr2
menu.
Once you have entered the
Pr2
menu press the
DOWN
key to move through
the parameters until the
Adr
parameter appears on the top display.
Now press the
SET
key once and the value number will begin to blink. Use
the arrow key to set the address and then hit the
SET
key.
After hitting the
SET
, it will automatically go to the next parameter. Let it time
out, or cycle power to the TempTrac.
Each TempTrac on a RS-485 network must have a unique MODBUS
address.
The TempTrac MODBUS adapter port:
The MODBUS adapter is an orange dongle with 2 green screw terminals attached to an 8 inch cable that
plugs into the back of the TempTrac at a white header. This can be an option installed on heater, or it may
be a separate line item part. When the option is available, it is MBUSC option code. As a standalone part,
it is PN: 11807.