Milesight UC100 - Page 30

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Reply format:
Channel
Type
Description
fc
6b/6c
00: data enquiry success
01: time point or time range invalid
02: no data in this time or time range
20
ce (Modbus Channel)
Data time stamp (4B) + Channel ID (1B) + Ctrl
(1B) + Data (4B)
20
cd (Custom Message)
Data time stamp (4B) + Data Length (1B) + Data
(Mutable)
Ctrl Format:
Bit
7
6-2
1
0
0
Data type
0: fetch failure
1: fetch success
0
Note:
1. The device only uploads no more than 300 data records per range enquiry.
2. When enquiring the data in time point, it will upload the data which is closest to the search
point within the reporting interval range. For example, if the device reporting interval is 10
minutes and users send command to search for 17:00’s data, if the device find there is data
stored in 17:00, it will upload this data; if not, it will search for data between 16:50 to 17:10 and
upload the data which is closest to 17:00.
Example:
1. Enquire historical data between 2024/01/18 15:45:00 to 2024/01/18 15:50:00.
fd6c fcd6a865 28d8a865
Channel
Type
Value
fd
6c (Enquire data in time
range)
Start time: fcd6a865 => 65a8d6fc =
1705563900 =2024/01/18 15:45:00
End time: 28d8a865 => 65a8d828 =
1705564200 =2024/01/18 15:50:00
Reply:
fc6c00
Channel
Type
Value
fc
6c (Enquire data in time range)
00: data enquiry success
20ce 93d7a865 00 3a 15000000
Channel
Type
Time Stamp
Value
20
ce (Modbus
93d7a865 =>
00: Channel 1