19
Then there is possible to change relay status by Modbus communication protocol command by
requested value writing to following addresses:
Function
Address [hex]
X
Address [dec]
X
Description
Status
Far condition for Relay1
0x0042
66
0 ... Relay1 open
1 ... Relay1 closed
R/W
Far condition for Relay2
0x0043
67
0 ... Relay2 open
1 ... Relay2 closed
R/W
6.1.5. Output relay alarm condition configuration with using of Modbus
With Modbus communication protocol there is possible to set regulator’s parameters described at
at page 8. Follow next steps:
1) To address 0x0044 (68) write value1 – it enables Modbus setting. By the way it blocks
regulator’s keyboard – local keyboard is blocked during remote control setting change.
2) Write the desired settings / changes to the addresses from 0x0045 (69) to 0x004E (78). New
setting can be done simultaneously or each register can be written alone
3) To address 0x004F (79) write value 1. Once this step is done, new setting is physically
stored into device memory (confirm change). Then registers 0x004F (79) and 0x0044 (68)
are automatically cleared (zero). It automatically unlocks the keyboard too.
Whole setting process can be cancelled by writing value 0 to address 0x0044 (68). At this
time no changes are stored and last setting stays valid.
Function
Unit Address
[hex]
X
Address
[dec]
X
Description
Status
Modbus
Remote
Control
[-] 0x0044
68
0 ... disable
1 ... enable (for this time device’s keyboard
is blocked, if key is pressed, message
BLOC is shown)
R/W
Value
assigned
to output
Relay1
by
value 0x0045
69
0 ... Off
1 ... temperature
2 ... relative humidity
3 ... atmospheric pressure
4 ... computed value
5 ... binary input 1
6 ... binary input 2
7 ... binary input 3
8 ... Far condition 0
9 ... Far condition 1
R/W
When close
Relay1
[-] 0x0046
70
0 ... alarm occurs, when measured value is
LOWER than preset alarm value
1 ... alarm occurs, when measured value is
HIGHER than preset alarm value
R/W
