DigitalFlow™ GF868 Programming Manual (2-Channel)
35
Chapter 1. Programming Site Data
1.7.5 Modbus Register Map (cont.)
Notes
:
1. Clear Totalizers:
flag from the 8051 to clear either the Channel 1 or Channel 2 totalizers.
2. MODBUS baud rate:
5 = 2400, 6 = 4800, 7 = 9600, 8=19200
3. MODBUS parity:
0 = none, 1 = odd, 2 = even
4. MODBUS stop bits:
1 = 1 stop bit, 2 = 2 stop bits
5. AVG Error Code:
0=Both Ch1 and Ch2 are in error.
1=Ch1 only is in error
2=Ch2 only is in error
3=Both channels are error free
6.
You must scale measurements in the host system. For example, velocity scaling is two decimal places; thus, if the
MODBUS card reports that the velocity is 100, the host system must interpret the number as 1.00 (two decimal
places)
1.7.6 Activating Security
In order to prevent unauthorized tampering with the flowmeter’s programming, the Model GF868 is equipped with a
security feature that locks out the following menus:
•
Program Menu
[PROG]
•
Calibration Menu
[CAL]
•
Log Menu
[LOG]
•
Clear Menu
[CLR]
When the system is locked, access to the above menus will be denied unless the correct password is entered. The Model
GF868 is shipped with a
default password
, which is given later in this section. For increased security, the default
password should be changed.
IMPORTANT:
Once the system has been locked, it can only be unlocked by entering the password, because access to the
SECUR
submenu is restricted.
To program the
SECUR
submenu, press [
and
[F1]
at the
Global PROGRAM
prompt. Refer to Figure 13 on page 89.
IMPORTANT:
It is recommended that all program parameters be recorded before changing the password. (This
information should be recorded in Appendix B,
Data Records
, as a matter of routine.) If the password is
lost, the site data is not retrievable and will have to be re-entered.
Summary of Contents for DigitalFlow GF868
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