Weishaupt EM3/2 - Modbus Input Data for Bus Participants

Installation and operating instruction
Fieldbus module EM3/2
7 Technical documentation
83296302 1/2018-01 La
20-32
7.2.2 Modbus input data for Bus participants
Register addresses have been created in the Fieldbus, which contain information
about the condition of the combustion manager. This can be read with the address
given. A register address contains 16Bit.
This information can be read with the following Function-Codes:
03 (0x03) Read Holding Registers,
01 (0x01) Read Coils.
Under description, the condition is entered if the Bit is set to 1.
The fault value (S) indicates the Bit value during a fault. Some bits are set to "0" in
the event of a fault. Bits marked "X" indicate the current state.
Index Bit Information Description S
0 0 Flame (ionisation) Signal flame (ionisation) present 0
1 Flame (flame sensor) Signal flame (flame sensor) present 0
2 Flame detection Flame signal detected 0
3 Air pressure switch X3:11 Air pressure available X
4 Input X3:12 Low / valve proving gas pressure switch, oil pressure
switch
X
5 Input X3:14 Remote reset, low gas pressure switch X
6 Input X3:15 High gas pressure switch, LDW2 (ducted air intake) X
7 Fuel change-over X3:8 0: Gas
1: Oil
X
8…15 not used – 0
1 0 Valve X3:5 Double gas valve, stage 1 solenoid valve X
1 Valve X3:6 Stage2 solenoid valve X
2 Valve X3:1 External LPG valve, safety solenoid valve, stage 1
solenoid valve
X
3 Ignition device X3:4 Ignition available X
4 Relay X3:3N Burner motor, frequency converter, valve continuous
running fan
X
5 Output operation B4 Various programs X
6 Control circuit (T1/T2) Temperature or pressure regulator X
7 Lockout Combustion manager is blocked X
8…15 not used – 0
2 0…7 Operating phase or error codes Current operating phase or, if in lockout, error codes X
8…15 not used – X
3 0…7 Flame quality or first detailed er-
ror code
Flame quality or first detailed error code X
8…15 not used – 0
4 0…7 Operating mode or second de-
tailed error code
Operating mode
3: Pneumatic gas operation
4: Oil operation
7: Electronic gas operation
or if in lockout second detailed error code
X
8…15 not used – X
5 0 Internal fuel change-over Input fuel change-over was activated 0
1…15 not used – X
6 0…7 Setpoint degree of modulation LowByte 16-Bit setpoint degree of modulation X
8…15 not used – 0
7 0…7 Setpoint degree of modulation HighByte 16-Bit setpoint degree of modulation X
8…15 not used – 0