Teledyne T360 User Manual

 

125 

The following set of instructions assumes that the user is familiar with MODBUS 
communications, and provides minimal information to get started. For additional 
instruction, please refer to the Teledyne API MODBUS manual, PN 06276. Also 
refer to www.modbus.org for MODBUS communication protocols. 

 

Instrument firmware with MODBUS capabilities installed. 

 

MODBUS-compatible software (TAPI uses MODBUS Poll for testing; see 
www.modbustools.com) 

 

Personal computer 

 

Communications cable (Ethernet or USB or RS232) 

 

Possibly a null modem adapter or cable 

Set Com Mode parameters 

Comm 

 
 
 
 
 
 

 

 Slave ID 

 

 
Ethernet:      Using the front panel menu, go to SETUP – MORE – COMM – INET; scroll through 

the INET submenu until you reach TCP PORT 2 (the standard setting is 502), then 
continue to TCP PORT 2 MODBUS TCP/IP; press EDIT and toggle the menu 
button to change the setting to ON, then press ENTR.  (Change Machine ID if 
needed: see “Slave ID”). 

USB/RS232:  Using the front panel menu, go to SETUP – MORE – COMM – COM2 – EDIT; scroll 

through the COM2  EDIT submenu until the display shows COM2 MODBUS RTU: 
OFF (press OFF to change the setting  to ON. Scroll NEXT to COM2 MODBUS 
ASCII and ensure it is set to OFF. Press ENTR to keep the new settings. (If RTU is 
not available with your communications equipment, set the COM2 MODBUS ASCII 
setting to ON and ensure that COM2 MODBUS RTU is set to OFF. Press ENTR to 
keep the new settings). 

If your analyzer is connected to a network with at least one other analyzer of the same model, a 
unique Slave ID must be assigned to each. Using the front panel menu, go to SETUP – MORE – 
COMM – ID. The MACHINE ID default is either “0” or the same as the model number. Toggle the 
menu buttons to change the ID. 

Reboot analyzer 

For the settings to take effect, power down the analyzer, wait 5 seconds, and power up the 
analyzer. 

Make appropriate cable 
connections 

Connect your analyzer either:  

 

via its Ethernet or USB port to a  PC (this may require a USB-to-RS232 adapter for your PC; if so, 
also install the software driver from the CD supplied with the adapter, and reboot the computer if 
required), or  

 

via its COM2 port to a null modem (this may require a null modem adapter or cable). 

Specify MODBUS software 
settings 
(examples used here are for 
MODBUS Poll software) 

1. 

Click Setup / [Read / Write Definition] /. 

a. 

In the Read/Write Definition window (see example that follows) select a Function  (what you 
wish to read from the analyzer).  

b. 

Input Quantity (based on your firmware’s register map). 

c. 

In the View section of the Read/Write Definition window select a Display (typically Float 
Inverse).  

d. 

Click OK.  

2. 

Next, click Connection/Connect. 

a. 

In the Connection Setup window (see example that follows), select the options based on 
your computer. 

b. 

Press OK. 

Read the Modbus Poll 
Register 

Use the Register Map to find the test parameter names for the values displayed (see example that 
follows If desired, assign an alias for each. 

07272B DCN6552