Notes - GE Panametrics GF868 Programming Manual

March 2003
Table 1-7: MODBUS Registers for a 1-Channel GF868
MODBUS DPR
Reg # Hex Addr
1 0
2 2
3 4
5 8
7 C
9 10
11 14
13 18
14 1A
16 1E
18 22
20 26
21 28
23 2C
24 2E
26 32
28 36
30 3A
32 3E
34 42
508 3F6
509 3F8
510 3FA
511 3FC
512 3FE

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
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).
1-34
Description
1"
Clear Ch1 Totalizers"
Not Used
Velocity
Act Volumetric
Std Volumetric
Fwd Totals
Rev Totals
#Tot Digits
Mass Flow
Fwd Mass Totals
Rev Mass Totals
#Mass Tot Digits
Timer
Error Code
Sound Speed
Molecular Weight
Signal Strength Upstream
Signal Strength Downstream
Temperature
Pressure
2
MODBUS baud rate
3
MODBUS parity
4
MODBUS stop bits
MODBUS meter addr
RESERVED
Scaling
(decimal places) Size in Bytes
-- 2 (16 bit signed)
-- 2 (16 bit signed)
2 4 (2 16-bit int)
#Q DIGITS 4 (IEEE 32 bit)
#Q DIGITS 4 (IEEE 32 bit)
#T DIGITS 4 (2 16 bit int)
#T DIGITS 4 (2 16 bit int)
0
#M DIGITS 4 (IEEE 32 bit)
#MT DIGITS 4 (2 16-bit int)
#MT DIGITS 4 (2 16-bit int)
0
2 4 (2 16-bit int)
0
3 4 (2 16-bit int)
4 4 (2 16-bit int)
1 4 (2 16-bit int)
1 4 (2 16-bit int)
2 4 (2 16-bit int)
3 4 (2 16-bit int)
0
0
0
0
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Programming Site Data
2
2
2
2
2
2
2
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