23
FO 935 ETH
MODBUS MAPPING TABLE
HEADER (information and commands):
Address
LO
(10)
Data HI
Data LO
W: write
W:write
W: read/write
1
Model
– MSD (ASCII)
Model - 3rd Digit (ASCII)
R
2
Model - 2nd Digit (ASCII)
Model
– LSD (ASCII)
R
3
Space (20H)
Vers.Fw
– MSD(ASCII)
R
4
Vers.Fw - 2nd Digit (ASCII)
Vers.Fw
– LSD(ASCII)
R
5
Qty channels (2*ASCII)
R
6
Options (see notes)
Options (see notes)
R
7
00
Incorrect datum received
R-see tab.
8
00
Info various causes
R-see tab.
9
00
Controls
W-see tab.
ILLEGAL DATA
On the other hand, some combinations are programming errors because they are wrong settings; in this case the error
code is ILLEGAL_DATA ,This information is accessible to ModBus reading the register 7.
NO ERROR
CH_1 Trip ≤ Alarm
CH_4 Trip ≤ Alarm
FAN_1 ON ≤ OFF 0 FAN INT ≤ 10
FAN_2 ON ≤ OFF
Value HFN > max see table:SYSTEM - Setting and Status
Value FCD > max see table:SYSTEM - Setting and Status
Value 4.20 > max see table:SYSTEM - Setting and Status
Voting Value > max see table:SYSTEM - Setting and Status
Note. If the value of Voting is higher than the max value expected for the model in question, it will be set equal to "0",
that is NO_VOTING.
CONTROL UNIT GENERAL NOTES
The models of the unit can be equipped with different options; to avoid disruption of production , their existence is
defined by Fw indicated power , with messages dedicated on display LEDs .
This information can be accessed by reading the Modbus register 6 (options) with the following meaning :
LOW Byte
Bit_1 = Ethernet
HIGH Byte
Bit_0/1 = 00 - Range -35°C ÷ 195°C
In the case of the Ethernet option, the ModBus and 4.20 functions from the panel will be disabled while they will be
readable from the centre.
Note; in case the values programmed from ModBus are out of range, a date "exception" error response will be
generated.
