CIAT AirControl CTA Manuel De Régulation page 112

The codes for the ModBus functions used are:
- 1 or 2: Read n bits
- 3 or 4: Read multiple registers (16 bits)
- 5: Write one bit
- 6: Write one register
- 8: Read diagnostics counters
- 11: Read event counter
- 15: Write n bits
- 16: Write multiple registers (16 bits)
NB: The JBus addresses are equal to the "ModBus address" - 1
5.3.3 ModBus TCP connection
The ModBus TCP protocol connection requires a communication card to be connected and configured as shown below. The
speed (baud rate) must be identical in the communication menu.
5.3.4 Variables
5.3.4.1 Orders
Register
Register hex. no.
decimal no.
0x118
0x119
0x11A
0x11B
0x11C
0x11D
0x122
Registers accessible in read-only mode (function 1) and write mode (function 5)
280 Remote on/off command
281 Fault acknowledgement
282 Electric heater load shedding
283 Unit actuation at eco/comfort temperature
284 Unit actuation at eco/comfort flow rate
285 Unit actuation at eco/comfort pressure
290 Choice of heating coil
Description
EN - 46
Format Type
Boolean Read/Write
Boolean Read/Write
Boolean Read/Write
Boolean Read/Write
Boolean Read/Write
Boolean Read/Write
Boolean Read/Write
Adjustable values
0: Off/1: On
0: No/1:
Acknowledgement
0: Free / 1: Load shedding
0: Comfort / 1: Eco
0: Comfort / 1: Eco
0: Comfort / 1: Eco
0 : Electric heater
1 : Hot water coil 1