EQJW 125: Heating controller
Communication functions
7001029003 A
© Fr. Sauter Ltd.
45
If desired, the controller will monitor the activity of the Modbus interface. As
long as valid Modbus enquiries are registered regularly, the controller will
reset the time monitoring. If no more enquiries are directed to the controller
for 30 minutes, it will operate independently again. Changes to the controller
outputs triggered via Modbus then become invalid. This function can be
disabled with CP24.
The EQJW 125 is compatible with the 'Modbus-Frame' protocol extension.
Enquiries in standard format are answered in standard format, and frame
enquiries receive an answer in frame format. This format allows reliable data
transmission even if the data are segmented during transmission. For
Modbus communication via modem, it is advisable to use the frame format
because precisely timed data transmission from the sender to the recipient is
often not available with modern transmission methods (modem with
compression and error correction functions, digital telephone network).
Details about the protocol extension are available on request.
6.3.1
Modbus data points (holding register)
Number of
holding
register
Description
Comment
Read
only
Decimal
points
Units
With
math.
sign?
40001
Product number
Product number, device code
yes
0
no
40003
Firmware version
Firmware version
yes
2
no
40004
Hardware version
Hardware version
yes
2
no
40010
OutdoorTemp_AF1
Measured value for input TA
no
1
°C
yes
40013
FlowTemp_VF1
Measured value for input TF
yes
1
°C
yes
40020
RoomTemp_RF1
Measured value for input TF
yes
1
°C
yes
40100
Time
Time (hours, minutes)
no
2
no
40101
Date
Date (day, month)
no
2
no
40102
Year
Year
no
0
no
40103
Switch position
Rotary switch:
0= Position for inputs, 1=Auto, 2=Off,
3=Manual, 4=Normal, 5=Reduced
yes
0
no
40106
Mode_Rk1
1=Auto, 2=Stdby, 3=Manual, 4=Sun, 5=Moon
no
0
no
40107
ControlSignal_Rk1
Opening for control signal [0...100%]
no
0
%
no
40117
AT_HeatOff_Rk1
Value TA heating switch-off
no
1
°C
yes
40145
Write-En_Modem
Write enable for modem
(code number input)
no
0
no
Содержание Equitherm EQJW 125
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Страница 58: ...EQJW 125 Heating controller Economy tips 7001029003 A Fr Sauter Ltd 57 ...
Страница 60: ...EQJW 125 Heating controller Resistance values for the Ni1000 sensors 7001029003 A Fr Sauter Ltd 59 ...
Страница 62: ...EQJW 125 Heating controller Dimension drawing 7001029003 A Fr Sauter Ltd 61 ...