Teledyne 465L, Operation Manual, Page: 61 / 89

Teledyne API Model 465L O3 Monitor Operation Manual
05509G DCN6806 Teledyne API Model 465L O
3
Monitor Manual 59
Note: If you do not receive “Reply” messages, make sure the unit is
properly attached to the network and that the IP address assigned is
valid for the particular network segment you are working with. If you
are not sure, check with your systems administrator.
9. Click the
Close
button to close the dialog box and return to the main
window.
8.6.
MODBUS Register Maps
8.6.1.
MODBUS Commands Supported
Table 8-6 lists the MODBUS commands that are supported by the 465L. Note that
the “Write” commands will only work with registers that are configured as
Read/Write, see Section 8.6.4. The “Read” commands can be used with any
register.
Table 8-6: Supported MODBUS Commands
MODBUS
Function Code Description
01 Read Coils
02 Read Discrete Inputs
03 Read Holding Registers
04 Read Input Registers
05 Write Single Coil
06 Write Single Register
15 Write Multiple Coils
16 Write Multiple Registers
8.6.2.
Notes on MODBUS registers
Concentration values in the MODBUS registers are always expressed in units of
PPB (parts-per-billion,) regardless of the concentration units setting of the monitor.