Ronan X76CTM - Manual (Page 21)

20
Register Parameter Name Dimension Data Style
1
Product Level. Inches Floating Point
2
3
Water Level. Inches Floating Point
4
5
Product Gross Volume. Gallons Floating Point
6
7
Total Gross Volume. Gallons Floating Point
8
9 Product Average Temperature. The average of the submerged
°F Floating Point
10 thermistor temperature.
11 Product Net Volume. The volume calculated when the product
Gallons Floating Point
12 temperature is 60°F.
13 Current CSLD (Continuous Statistical Leak Detection) Leak Rate. Gallons
Floating Point
14 Rate is based on at least one month test history. per Hour
15 Last Completed Leak Test Rate. A test that has not been canceled Gallons
Floating Point
16 before the scheduled test duration has expired. Per Hour
17 Time of Last Completed Test. Time is in UNIX format (32 bit
Seconds
Unsigned Long
18 integer, number of seconds since January 1, 1970). Number
19 Tank Status. A field with different flags that correspond to tank Unsigned Long
20 alarms. Number
21
Scaled Product Level. 0.001 Inches
Unsigned Long
22 Number
23
Scaled Water Level. 0.001 Inches
Unsigned Long
24 Number
25
Scaled Product Gross Volume. 0.001 Gallons
Unsigned Long
26 Number
27
Scaled Total Gross Volume. 0.001
Unsigned Long
28 Number
29 Scaled Product Average Temperature. The average of the sub-
0.001°F
Unsigned Long
30 merged thermistor temperatures. Number
31 Scaled Product Net Volume. The calculated volume when the
0.001 Gallons
Unsigned Long
32 product temperature is 60°F. Number
33 Scaled Current CSLD (Continuous Statistical Leak Detection) 0.001 Gallons Unsigned Long
34 Leak Rate. Based on a least one month test history. per Hour Number
35 Scaled Last Completed Leak Test Rate. A test that has not been 0.001 Gallons Unsigned Long
36 canceled before the scheduled test duration expired. per Hour Number
37-50 Reserved.
Modbus™ Register Allocations
trator can access and alter the user codes.
Function 62 is used to change the PIN codes.
During new code entry, the numbers are sub-
stituted with asterisks (*) on the display for
additional security. The administrator should
first log in, then enter the new user number.
This starts the login procedure for the new
user. When Function 62 is pressed, a prompt
for entering the user’s PIN will appear.
For example: To change the PIN for user 4,
log in as administrator, pressing 0. Enter the
PIN code for administrator. The default dis-
play will appear. Press 4. The X76CTM will
prompt to enter the user 4 PIN number. Dis-
regard prompt and press Function 62. The
system will prompt again for the new user 4
PIN number. Enter the new code.
10.2 Modbus ™ Support
The X76CTM supports Modbus™ protocol in
both ASCII and RTU modes. The mode is
selectable via the front panel or the text ter-
minal interface. For constant reading of the
tank information, the RTU mode is recom-
mended because of the small data overhead.
10.2.1 Register Allocation. The system data
accessible through Modbus™, is on a per
tank basis.The variables are sent in IEEE
4 bit floating point format or as 4 bit scaled
integer long numbers, for devices that do not