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HA71 Digital Gas Controller
24 Hour Trend Database:
The 24 hour MAX, MIN and AVERAGE trend data may be retrieved over the Modbus
MIN and AVERAGE values, or, one value for every 1/10 hour (6 minutes). Since there are 16 channels this database equals 3,840 registers
in addresses 33017-36857. Due to the large size, MAX, MIN or AVERAGE values may only be retrieved one at a time. To improve bandwidth
the master may retrieve the database in blocks of 120 registers at a time (one half of a channel's data). The C1 only updates these 3,840
registers upon receiving an update command from the Modbus
Type
Update MIN
Update AVG.
Update MAX
This update requires several seconds. Therefore, a data ready register is available to notify the master upon completion.
Type
MIN Ready
AVG. Ready
MAX Ready
Trend database registers
Type
24 hr Trend
HA71 Technical Manual
Channel
First
Last
n/a
2065
n/a
n/a
2066
n/a
n/a
2067
n/a
Channel
First
Last
n/a
12065
n/a
n/a
12066
n/a
n/a
12067
n/a
Channel
First
Last
1-16
33017
36857
®
master.
Read FC Write FC
n/a
5
Moves 24 hour MIN data trend to trend data base
n/a
5
Moves 24 hour MIN data trend to trend data base
n/a
5
Moves 24 hour AVG data trend to trend data base
Read FC Write FC
2
n/a
0 = data ready; 1 = update in progress
2
n/a
0 = data ready; 1 = update in progress
2
n/a
0 = data ready; 1 = update in progress
Read FC Write FC
5
n/a
Transfers 24 hour trend for MAX, MIN or AVG.
5-8
®
serial interface. Each channel consists of 240 MAX,
Notes
Notes
Notes
Revision 3 (04/08)
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