Campbell-scientific LR4 Four Channel Latching Relay Module Manual do Utilizador Página 12
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LR4 Four Channel Latching Relay Module
SDI-12 Command
Command
Function/Description
Values Returned
aMC!
aMCn!
Same as aM!
aC! Concurrent Measurements
Status All 4 Relays - 0 or 1
State
R1, R2, R3, R4 (4
values)
aCn! Concurrent Measurements
Same as M1 – M8
Output is the
Same as M1 – M8
aCC!
aCCn!
Concurrent Measurement
Commands with Checksum.
See aM and aM1- aM8
Output is the same
as
aM, aM1-aM8
Checksum is added
aD0! Send Data Dependent upon
command Sent
aV! Verification command S1,S2,V,WD
S1 = BootRom
Signature
S2 = Firmware
Signature
V = Supply
Voltage
Note1
WD = Watch Dog
Errors
aI! Send Identification 013CAMPBELL
LR4 2.0SN
SN = Serial number
(5 digits)
?! Address Query a
aAb! Change Address command b is the new address
aXR;0,R1,R2,R3,R4!
Extended
command
Sets Values of All 4 Relays to
either 0 or 1 state
Where R1 is 0 or 1 for Relay #1
Where R2 is 0 or 1 for Relay #2
Where R3 is 0 or 1 for Relay #3
Where R4 is 0 or 1 for Relay #4
a
Address is returned
with a value of 1.
aXR;N,V!
Extended
command
Set the State of an Individual
Relay.
N is 1-4 corresponding to
Relays #1 to #4,
V is 0 or 1 state
a
Address is returned
with a value of 1.
aR0! Same as aM! Same as aM!
command
aR1! to aR8! Same as aM1! to aM8! Same as M
commands
Where a = address of SDI-12 device.
Where n = numbers 1 to 9
6
- LR4 Four Channel 1
- Latching Relay Module 1
- Warranty 3
- Assistance 4
- LR4 Table of Contents 5
- List of Figures 6
- List of Tables 6
- 1. General Description 7
- 2. Specifications 7
- 3. Relay Details 8
- 4. Contact Details 8
- 5. Manual Toggle Control 9
- 6. LED Indicators 10
- 7. Using SDI-12 10
- 7.2 SDI-12 Addresses 11
- 7.3 SDI-12 Commands 11
- 7.4.2 Setting Relay Values 13
- 7.4.3 CR200(X) Programming 13
- 7.5 Edlog Set Relay Example 14
- 8. Using Modbus 15
- 8.1.2 RS-485 16
- 8.2 Modbus Baud Rate 17
- 8.3 Modbus Mode 17
- 8.4 Modbus Address 17
- 8.6 Modbus Operation 17
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