Downlink Command

This chapter describes the downlink commands for device configuration and control. The downlink application port is 85 by default.

Note: If the downlink command length is more than 53, please do not send multiple commands together, or change the RX2 Data Rate parameter of the device and network server to a higher value to extend the downlink length limitation.

Basic Settings

Item Channel Type Byte Description
Report Interval ff 03 2 UINT16, Unit: s
Reboot ff 10 1 ff
Data Storage ff 68 1 00: Disable, 01: Enable
Data Retransmission ff 69 1 00: Disable, 01: Enable
Data Retransmission Interval f9 0d 2 UINT16, Unit: s, Range: 30~1200, Default: 600
UTC Time Zone ff bd 2 INT16/60
Sync Time with LNS ff 4a 1 00
Daylight Saving Time f9 72 9
Byte 1:
Bit7 Bit6-0
0=Disable, 1=Enable DST bias, unit: min, range: 1-120

Byte 2-5: Start time, Month (1B)+Week&Day (1B) + Minute Time (2B)

Byte 6-9: End time

Week&Day:
Bit7-4 Bit3-0
Week number, range: 1-5 Weekday, range: 1-7
Enquiry Periodic Report ff 28 1 ff
Rejoin the Network ff 04 1 ff
Example:
  1. Reboot the device.
    ff10ff
  2. Set report interval as 20 minutes.
    ff03b004
    Channel Type Value
    ff 03 b004=>04b0=1200s=20 minutes
  3. Set time zone as UTC-4.
    ffbd10ff
    Channel Type Value
    ff bd 10 ff => ff 10 = -240/60=-4
  4. Set DST time: start time is last Sunday 1:00 of March, end time is last Sunday 1:00 of October, and bias is 1h (60 minutes).
    f972bc03573c000a573c00
    Channel Type Value
    f9 72

    bc=>1 0111100 =>1=Enable, 0111100=60 minutes

    Start time: 03=>March, 57=>last (5) Sunday(7), 3c 00 =>00 3c=60 minutes =1:00

    End time: 0a=>10=October, 57=>last (5) Sunday(7), 3c 00 =>00 3c=60 minutes =1:00

RS485 Settings

Item Channel Type Byte Description
Serial Settings f9 78 7 Byte 1-4: Baud rate, options: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200

Byte 5: Data Bit, options: 07, 08, 09

Byte 6: Stop Bit, 01=1, 02=2, 03=1.5

Byte 7: Parity, 00=None, 01=Even, 02=Odd
Modbus Settings f9 79 7 Byte 1-2: Execution interval, Unit: ms, Range: 10-1000

Byte 3-4: Max Resp Time, Unit: ms, Range: 10-60000

Byte 5: Max Retry Times, Range: 0-5

Byte 6: 00=Disable pass-through, 10=Active Pass-through, 11=Two-way Pass-through

Byte 7: Pass-through port, range: 2-84, 86-223
Enquiry RS485 Settings f9 7a 1 00=Serial Settings, 01=Modbus Settings
Example:
  1. Serial settings: baud rate is 9600, data bit is 8, stop bit is 1, no parity.
    f97880250000080100
    Channel Type Value
    f9 78 Baud rate: 80 25 00 00=>00 00 25 80=9600

    Data bit: 08=8

    Stop bit: 01=1

    Parity: 00=None
  2. Modbus settings: execution interval is 50ms, max resp time is 60000ms, max retry time is 3, enable Active pass-through and set the port as 5.
    f979320060ea031005
    Channel Type Value
    f9 79 Execution interval: 32 00=>00 32=50ms

    Max Resp Time: 60 ea => ea 60=60000ms

    Max Retry Time: 03=3

    10=Active Pass-through

    Pass-through port: 05=5
  3. Enquire serial settings.
    f97a00
    Channel Type Value
    f9 7a 00=Enquiry Serial Settings
    Reply:
    f87a0000 f97880250000080100
    Channel Type Value
    f8 7a 00=Serial Settings, 00=Enquire Success
    f9 78 Baud rate: 80 25 00 00=>00 00 25 80=9600

    Data bit: 08=8, Stop bit: 01=1, Parity: 00=None

Modbus Channel Settings

Item Channel Type Byte Description

Add/Configure Modbus Channel

 ff ef 7

01+ Channel ID (1B)+Slave ID (1B) + Address (2B) + Data Type (1B) + Quantity & Sign (1B)

Quantity & Sign:

bit4: 1=signed, 0=unsigned (only work with Holding register int or Input register int types)

bit3-bit0: Registers number, range: 1-2

Delete Modbus Channel

 ff ef 2

00+Channel ID (1B)

Mobus Channel Name

 ff ef 4-19

02+Channel ID (1B) + Name Length (1B) + Name (Mutable)
Channel ID:
The channel ID in downlink commands is different from uplinks:
Channel ID Description
01 RS485 (Modbus Master) Channel 1
02 RS485 (Modbus Master) Channel 2
... ...
1f RS485 (Modbus Master) Channel 31
20 RS485 (Modbus Master) Channel 32
Data Type:
Code Data Type
00 Coil
01 Discrete
02 Input16_AB
03 Input16_BA
04 Input32_ABCD
05 Input32_BADC
06 Input32_CDAB
07 Input32_DCBA
08 Input32_AB
09 Input32_CD
0a Input_float_ABCD
0b Input_float_BADC
0c Input_float_CDAB
0d Input_float_DCBA
0e Hold16_AB
0f Hold16_BA
10 Hold32_ABCD
11 Hold32_BADC
12 Hold32_CDAB
13 Hold32_DCBA
14 Hold32_AB
15 Hold32_CD
16 Hold_float_ABCD
17 Hold_float_BADC
18 Hold_float_CDAB
19 Hold_float_DCBA
1a Input_double_ABCDEFGH
1b Input_double_GHEFCDAB
1c Input_double_BADCFEHG
1d Input_double_HGFEDCBA
1e Input64_ABCDEFGH
1f Input64_GHEFCDAB
20 Input64_BADCFEHG
21 Input64_HGFEDCBA
22 Hold_double_ABCDEFGH
23 Hold_double_GHEFCDAB
24 Hold_double_BADCFEHG
25 Hold_double_HGFEDCBA
26 Hold64_ABCDEFGH
27 Hold64_GHEFCDAB
28 Hold64_BADCFEHG
29 Hold64_HGFEDCBA
Example:
  1. Add a Modbus channel 1: a register, slave ID is 1, address is 1, type is input_float_ABCD.


    ffef 010101ffff0a01

    Channel

    Type

    Value
    ff ef Channel: 01=Channel 1

    Slave ID: 01

    Address: ff ff =65535

    Type: 0a = Input_float_ABCD

    01=one register
  2. Set name of Modbus channel6 as “test6”.
    ff ef 02 06 05 7465737436

    Channel

    Type

    Value
    ff ef

    Channel: 06=Channel 6

    Name length: 05=5 Bytes

    Hex to ASCii: 74 65 73 74 36 => t e s t 6

Rule Settings

Item Channel Type Byte Description
Rule Status f9 76 3

Byte 1-2: 1=enable configuration for per bit (rule)

Byte 3: 01 = Enable, 02 = Disable, 03= Delete
Enquire Rule Settings f9 77 1

Rule ID, Range: 1~16, the reply content is the same as the configured command
Rule-Condition：
Item Channel Type Byte Description
Time f9 7d 9
Byte 1:
Bit7 Bit6-0
0=Disable, 1=Enable Rule ID, Range: 1-16

Byte 2: 11

Byte 3: Repeat mode, 00=weekly, 01=monthly

Byte 4-7: Repeat weekday or month day, 1=Enable, 0=Disable for per bit
Bit Weekly Mode Monthly Mode
0 Monday 1st
1 Tuesday 2nd
... ... ...
6 Sunday 7th
... …. ...
30 0 30th
Byte 8: Hour, range: 0-23

Byte 9: Minute, range: 0-59
Channel f9 7d 20
Byte 1:
Bit7 Bit6-0
0=Disable, 1=Enable Rule ID, Range: 1-16
Byte 2: 12

Byte 3: Channel ID, Range: 1-32

For threshold alarm:

Byte 4:
Bit7-4: Continue Mode Bit3-0: Threshold Mode
0: Is continued for Less than

1: Is continued for More than

 0: False, 1: True

2: Below, 3: Above, 4: Within

Note: False or True is only for Coil or Discrete type.
Byte 5-8: Continue time, UINT32, Unit: ms, Range: 0-86400000

Byte 9-12: Lock time, UINT32, Unit: ms, Range: 0-86400000

Byte 13-16: Minimum threshold, Float32

Byte 17-20: Maximum threshold, Float32

For change alarm:

Byte 4: 06=Change without time, 07=Change with time interval

Byte 5-12: All 0

Byte 13-16: Value change time interval, UINT32, Unit: ms, Range: 0-86400000

Byte 17-20: Maximum threshold, Float32
Received a command via the RS485 interface f9 7d 5-51
Byte 1:
Bit7 Bit6-0
0=Disable, 1=Enable Rule ID, Range: 1-16
Byte 2: 13

Byte 3: Message Length, Range: 2-48

Byte 4-N: Message Content (Hex to ASCii)
Received a server message f9 7d 5-51
Byte 1:
Bit7 Bit6-0
0=Disable, 1=Enable Rule ID, Range: 1-16
Byte 2: 14

Byte 3: Message Length, Range: 2-48

Byte 4-N: Message Content (Hex to ASCii), only letter, number, comma, period, separator and exclamation mark are allowed
Received a D2D control command f9 7d 5
Byte 1:
Bit7 Bit6-0
0=Disable, 1=Enable Rule ID, Range: 1-16
Byte 2: 15

Byte 3-4: D2D Command

Byte 5: Designed state, 00=Disable, 01=On, 02=Off
Device Restart f9 7d 2
Byte 1:
Bit7 Bit6-0
0=Disable, 1=Enable Rule ID, Range: 1-16
Byte 2: 16
Rule-Action：
Item Channel Type Byte Description
No Action f9 7d 2
Byte 1:
Bit7 Bit6-0
0=Disable, 1=Enable Rule ID, Range: 1-16
Byte 2: 90=Action 1, a0=Action 2, b0=Action 3
Send a server message f9 7d 8-55
Byte 1:
Bit7 Bit6-0
0=Disable, 1=Enable Rule ID, Range: 1-16
Byte 2: 91=Action 1, a1=Action 2, b1=Action 3

Byte 3-6: Delay time, UINT32, Unit: ms, Range: 0-86400000

Byte 7: Message Length, Range: 1-48

Byte 8-N: Message Content (Hex to ASCii), only letter, number, comma, period, separator and exclamation mark are allowed
Send a D2D control command f9 7d 8
Byte 1:
Bit7 Bit6-0
0=Disable, 1=Enable Rule ID, Range: 1-16
Byte 2: 92=Action 1, a2=Action 2, b2=Action 3

Byte 3-6: Delay time, UINT32, Unit: ms, Range: 0-86400000

Byte 7-8: D2D Command
Send a command via the RS485 interface f9 7d 9-55
Byte 1:
Bit7 Bit6-0
0=Disable, 1=Enable Rule ID, Range: 1-16
Byte 2: 93=Action 1, a3=Action 2, b3=Action 3

Byte 3-6: Delay time, UINT32, Unit: ms, Range: 0-86400000

Byte 7: Message Length, Range: 2-48

Byte 8-N: Message Content (Hex to ASCii)
Upload data package f9 7d 6
Byte 1:
Bit7 Bit6-0
0=Disable, 1=Enable Rule ID, Range: 1-16
Byte 2: 94=Action 1, a4=Action 2, b4=Action 3

Byte 3-6: Delay time, UINT32, Unit: ms, Range: 0-86400000
Upload alarm packet f9 7d 7
Byte 1:
Bit7 Bit6-0
0=Disable, 1=Enable Rule ID, Range: 1-16
Byte 2: 95=Action 1, a5=Action 2, b5=Action 3

Byte 3-6: Delay time, UINT32, Unit: ms, Range: 0-86400000

Byte 7: Threshold release packet upload, 00=Disable,01=Enable
Device Restart f9 7d 6
Byte 1:
Bit7 Bit6-0
0=Disable, 1=Enable Rule ID, Range: 1-16
Byte 2: 96=Action 1, a6=Action 2, b6=Action 3

Byte 3-6: Delay time, UINT32, Unit: ms, Range: 0-86400000
Reply Format:
Channel Type Command Content Reply
f8 7d The same as command 00: Success

02: Out of range

10: Illegal condition

11: Illegal condition parameter

12: Illegal action1 parameter

13: Illegal action2 parameter

14: Illegal action3 parameter

15: Condition conflicts with action1 configuration

16: Condition conflicts with action2 configuration

17: Condition conflicts with action3 configuration

18: Action 1 and Action 2 are configured repeatedly

19: Action 1 and Action 3 are configured repeatedly

1a: Action 2 and Action 3 are configured repeatedly
Example:
  1. Enable Rule 1 and Rule 16.
    f976018001
    Channel Type Value
    f9 76 01 80 => 80 01=Bit15 and Bit 0 is 1=Rule 16 and Rule 1

    01=Enable
  2. Add/Configure Rule 1 as below:


    f97d8111002a0000000805
    Channel Type Description
    f9 7d 81=>1 0000001=Rule1 enable

    11=Time Condition, 00=Weekly

    2a000000=>00 00 00 2a = 0010 1010 =every Tues., Thurs., and Sat.

    0805=8:05


    f97d8191e80300000568656c6c6f
    Channel Type Description
    f9 7d 81=1 0000001= Rule1 enable

    91= Action 1: Send a server message

    Delay time: e8 03 00 00 => 00 00 03 e8 = 1000ms

    Message length: 05 => 5

    68 65 6c 6c 6f=> hello (Hex to ASCii)


    f97d81a2d007000012fe
    Channel Type Description
    f9 7d 81=1 0000001= Rule1 enable

    a2= Action 2: Send a D2D control command

    Delay time: d0 07 00 00=> 00 00 07 d0 = 2000ms

    D2D command: 12fe => fe12


    f97d81b3b80b00001031323334353637383930616263646566
    Channel Type Description
    f9 7d 81=1 0000001= Rule1 enable

    b3= Third Action 3: Send a command via the RS485 interface

    Delay time: b8 0b 00 00 =>00 00 0b b8=3000ms

    Message length: 10 =>16

    31323334353637383930616263646566 => 1234567890abcdef (Hex to ASCii)
  3. Enquire rule 2 configuration.
    f97702
    Channel Type Value
    f9 77 02=Rule 2
    Reply:


    f97d8212041310270000881300000000000000a040

    f97d8294a00f0000 f97d82a0f97d82b0
    Channel Type Value
    f9 7d 82=1 0000010= Rule2 enable

    12=Channel Condition, 04=Modbus Channel 4

    13=>Above, is more than

    Continue time: 10 27 00 00 =>00 00 27 10=10000ms

    Lock time: 88 13 00 00 => 00 00 13 88= 5000ms

    Minimum threshold: 00 00 00 00

    Maximum threshold: 00 00 a0 40=> 40 a0 00 00=5 (Hex to Float32)
    f9 7d 82=1 0000010= Rule2 enable

    94= Action 1: Upload a data package

    Delay time: a0 0f 00 00=>00 00 0f a0=4000ms
    f9 7d 82=1 0000010= Rule2 enable

    a0=Action 2: No Action
    f9 7d 82=1 0000010= Rule2 enable

    b0= Action 3: No action