Thermo Scientific AquaSensors
™
DataStick
™
Ethernet Communications User Guide
71
7.3 Modbus TCP and PCCC Register Map
This section shows the register map for the Modbus TCP and the PCCC.
The PCCC registers are determined from the corresponding Modbus TCP registers as
follows:
Take the Modbus TCP register number of interest, ignore the leading 4
and divide by 100. The quotient is the register file (prefixed with N) and
the remainder is the register number.
For example, to read Modbus TCP register 42,001 (Sensor Value), ignore the leading 4 to
obtain 2,001, and divide 2,001 by 100 to obtain 20 with a remainder of 1. The register
file, then, is N20 and the register is 1, or N20:01.
In the tables in this section, each row contains two entries in the Register Number
column; the top entry is the Modbus TCP register and the bottom entry is the PCCC
register as shown in Figure 67. Both represent the same register in the Ethernet product.
Figure 67: The top entry is the Modbus TCP register
and the bottom entry is the PCCC register.
The Uptime registers shown in Table 4 indicate the elapsed time since the power was
applied to the product.
Table 4: Uptime registers.
Register
Number
Description
Data
Type
Access
DataStick
Command
Comment
Example
Value
Variable
Class
410,000
N100:00
Uptime in
days
integer R
N/A Elapsed
time…
3 Information
410,001
N100:01
Uptime in
hours
integer R
N/A since
last
reset…
22 Information
410,002
N100:02
Uptime in
minutes
integer R
N/A or
application…
47 Information
410,003
N100:03
Uptime in
seconds
integer R
N/A of
power.
16 Information
Modbus TCP
Register
PCCC
Register
