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IQ 150S/250S B: Modbus Map
B.5.1: Data Formats
Time stamp: Stores a date from 2000 to 2099. Time stamp has a Minimum resolution of 1 second.
The high bits of each time stamp byte are used as flags to record meter state information at the
time of the time stamp. These bits should be masked out, unless needed.
B.5.2: IQ 250S Meter Logs
The IQ 2500S meter has 5 logs: System Event, Alarm (Limits), and 3 Historical logs. Each log is
described below.
1.
System Event (0)
: The System Event log is used to store events which happen in, and to, the
meter. Events include Startup, Reset Commands, Log Retrievals, etc. The System Event Log
Record takes 20 bytes, 14 bytes of which are available when the log is retrieved.
NOTE:
The complete Systems Events table is shown in Section B.5.5, step 1, on page B-19.
2.
Alarm Log (1):
The Alarm Log records the states of the 8 Limits programmed in the meter.
• Whenever a limit goes out (above or below), a record is stored with the value that caused the
limit to go out.
• Whenever a limit returns within limit, a record is stored with the "most out of limit" value for
that limit while it was out of limit.
The Alarm Log Record uses 16 bytes, 10 bytes of which are available when the log is retrieved.
Byte
0
1
2
3
4
5
Value
Year
Month
Day
Hour
Minute
Second
Range
0-99 (+2000)
1-12
1-31
0-23
0-59
0-59
Mask
0x7F
0x0F
0x1F
0x1F
0x3F
0x3F
Byte
0
1
2
3
4
5
6
7
8
9
10
11
12
13
Value
timestamp
Group
Event
Mod
Chan
Param1
Param2
Param3
Param4
Byte
0
1
2
3
4
5
6
7
8
9
Value
timestamp
direction
limit#
Value%
Содержание IQ 150S
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