Weishaupt EM3/2 User manual

Installation and operating instruction
Fieldbus module EM3/2 83296302 1/2018-01

Installation and operating instruction
Fieldbus module EM3/2
83296302 1/2018-01 La 2-32
1 User instructions.............................................................................................................. 3
1.1  Target group.................................................................................................................. 3
1.2  Symbols.......................................................................................................................... 3
1.3  Guarantee and Liability............................................................................................... 4
2 Safety ..................................................................................................................................... 5
2.1  Designated application............................................................................................... 5
2.2  Safety measures........................................................................................................... 5
2.2.1  Electrical connection............................................................................................5
2.2.2  Disposal...................................................................................................................5
3 Installation ........................................................................................................................... 6
3.1  Installing Fieldbus module.......................................................................................... 6
3.2  Setting the DIP switches............................................................................................ 7
4 Installation ........................................................................................................................... 8
4.1  Electrical connection................................................................................................... 8
5 Commissioning................................................................................................................. 9
6 Troubleshooting ............................................................................................................ 11
7 Technical documentation......................................................................................... 12
7.1  Profibus ........................................................................................................................12
7.1.1  Profibus output data to Fieldbus module ..................................................... 12
7.1.2  Profibus input data for Bus participants ....................................................... 14
7.1.3  Profibus interface specification....................................................................... 17
7.2  Modbus ........................................................................................................................18
7.2.1  Modbus output data to Fieldbus module...................................................... 18
7.2.2  Modbus input data for Bus participants ....................................................... 20
8 Spares................................................................................................................................. 28
9 Key word index .............................................................................................................. 30

Installation and operating instruction
Fieldbus module EM3/2
1 User instructions
83296302 1/2018-01 La 3-32
1 User instructions
Translation of original
operating instructions
This manual forms part of the equipment and must be kept on site.
Carefully read the manual prior to working on the unit.
1.1 Target group
The manual is intended for the operator and qualified personnel. They should be
observed by all personnel working with the unit.
Work on the unit must only be carried out by personnel who have the relevant train-
ing and instruction.
In accordance with EN 60335-1 the following requirements apply
This appliance can be used by children 8 years and above as well as by persons
with limited physical, sensory or mental capacities or lack of experience and know-
ledge, provided they are supervised or have been instructed regarding the safe use
of the appliance and understand the resulting danger. Children must not play with
the appliance. Cleaning and operator maintenance must not be carried out by chil-
dren without supervision.
1.2 Symbols
DANGER
Immediate danger with high risk.
Non observance can lead to serious injury or death.
WARNING
Danger with medium risk.
Non observance can lead to environmental damage,
serious injury or death.
CAUTION
Danger with low risk.
Non observance can cause damage to the equip-
ment and injury to personnel.
Important information
Requires direct action
Result after an action
Itemisation
… Range of values

Installation and operating instruction
Fieldbus module EM3/2
1 User instructions
83296302 1/2018-01 La 4-32
1.3 Guarantee and Liability
Guarantee and liability claims for personal and equipment damage are excluded, if
they can be attributed to one or more of the following causes:
non approved application,
non-observance of the manual,
operation with faulty safety equipment,
continual operation despite a fault,
improper installation, commissioning, operation and service,
repairs, which have been carried out incorrectly,
the use of non original Weishaupt parts,
force majeure,
the installation of additional components, which have not been tested with the
unit.

Installation and operating instruction
Fieldbus module EM3/2
2 Safety
83296302 1/2018-01 La 5-32
2 Safety
2.1 Designated application
The fieldbus moduleEM3/2 is suitable for use with the combustion
managerW-FM 25.
The following Bus protocols are available:
Profibus-DP
Modbus-RTU
Modbus-ASCII
2.2 Safety measures
Safety relevant fault conditions must be eliminated immediately.
2.2.1 Electrical connection
For work carried out on live components:
Observe the accident prevention instructions DGUVRegulation3 and adhere to
local directives,
tools in accordance with EN 60900 should be used.
2.2.2 Disposal
Dispose of all materials and components in a safe and environmentally friendly way
at an authorised location. Observe local regulations.

Installation and operating instruction
Fieldbus module EM3/2
3 Installation
83296302 1/2018-01 La 6-32
3 Installation
3.1 Installing Fieldbus module
DANGER
Risk of electric shock
Working on the device when voltage is applied can lead to electric shock.
Isolate the device from the power supply prior to starting any work.
Safeguard against accidental restart.
Unplug 7 pole connection plug on burner.
Remove cover1.
Carefully install module2 using the guides3.
Break out the pre-cut surfaces4 and fit cover1.
1
3
2
4
1
You can check if the combustion manager has recognised the module by interrog-
ating Information 13 in the Info level, see installation and operating manual of the
burner.

Installation and operating instruction
Fieldbus module EM3/2
3 Installation
83296302 1/2018-01 La 7-32
3.2 Setting the DIP switches
The termination (line termination) can be activated via the DIP switches. If the ter-
mination is activated via the DIP switches, no external termination resistor must be
connected.
Check and adapt the setting of the DIP switches on the module.
Unused termination should be set to OFF.
1 2 3 4 5
O
N
DIP switches Description Setting
OFF ON
1Modbus termination not activated activated (120 Ohm)
2 and 3Profibus termination not activated(1 activated (240 Ohm)(1
4Bus protocol setting Profibus Modbus
5no function – –
(1 Switch both DIP switches on or off.

Installation and operating instruction
Fieldbus module EM3/2
4 Installation
83296302 1/2018-01 La 8-32
4 Installation
4.1 Electrical connection
DANGER
Risk of electric shock
Working on the device when voltage is applied can lead to electric shock.
Isolate the device from the power supply prior to starting any work.
Safeguard against accidental restart.
The electrical connection must only be carried out by qualified electricians. Ob-
serve local regulations.
Profibus
Do not exceed maximum cable length.
Data rate [kBit/s] 9.6 19.2 45.45 93.75 187.5 500 1500 3000 6000 12000
Max. length [m] 1200 1200 1200 1200 1000 400 200 100 100 100
Modbus
Do not exceed maximum cable length of 1000metres.
Wiring diagram
The termination (line termination) can be activated via the DIP switches. If the ter-
mination is activated via the DIP switches, no external termination resistor must be
connected.
Connect Bus connections as shown on wiring diagram.
W-FM 25
A VCC (5V) B GND
1 2 3 4
EM3/2

Installation and operating instruction
Fieldbus module EM3/2
5 Commissioning
83296302 1/2018-01 La 9-32
5 Commissioning
Observe the installation and operating manual of the burner.
1. Set Fieldbus address
Switch on voltage supply.
The parameter level can only be called up in Standby (OFF) mode.
Press [+] and [Enter] keys simultaneously for approx. 2 seconds.
The parameter level is activated.
Press[+] key.
Parameter 1 is displayed.
Briefly press [–] and [+] keys simultaneously.
Display changes from OFF to address.
Use[–] or [+] keys to set address required.
Press [ENTER].
The address set is stored.
The next parameter is displayed.
Press[Enter] several times, until the operating level is reached.
2. Check Modbus protocol
If the Profibus protocol is used skip this step.
The Modbus protocol can only be changed via the control centre (master).
Check Modbus protocol and set using Function-Code 0x41 if required.
As delivered
Baud rate: 19200
Modbus mode: RTU
Parity: even
Address Function-Code
0x41 Baud rate Hi Baud rate Lo Parity Modbus mode CRC16
Baud rates supported: 2400, 9600, 19200, 57600 (no parity possible at 57600)
Example: 9600 Bd = 0x25 HighByte and 0x80 LowByte
Modbus mode: 1: RTU-Mode
2: ASCII-Mode
Parity: 1: no parity but 2 Stop Bits
2: even
3: odd
Following the adjustment, the fieldbus module initiates a reset and immediately
starts operating with the new protocol. The setting is permanently saved in the
Slave. If the Exception-Code is returned, the setting will not change.

Installation and operating instruction
Fieldbus module EM3/2
5 Commissioning
83296302 1/2018-01 La 10-32
3. Set parameter 200
Parameter200 stipulates, how the combustion manager reacts to the heat demand
via Bus or control circuit(T1/T2). The parameter can only be changed via a PC us-
ing VisionBox Software.
Check parameter 200 and change value if necessary.
The change will be adopted after maximum 20 seconds or at restart of the com-
bustion manager.
Value Function
0 Only control circuit activated (T1/T2), factory setting.
Heat demand via Bus is ignored.
1 Control circuit(T1/T2) releases heat demand via Bus.
A heat demand via Bus is only accepted if the control circuit(T1/
T2) is closed.
After 10seconds of bus separation, the combustion manager ini-
tiates a control shutdown.
2 Bus default and control circuit(T1/T2) activated.
Change-over to the control circuit(T1/T2) occurs under the fol-
lowing circumstances:
after 10 seconds Bus separation,
if "Deactivate heat demand via Bus“ is set.
Profibus [ch.7.1.1]
Modbus [ch.7.2.1]
3 Only Bus default active, with controlled shutdown.
The control circuit (T1/T2) is ignored.
After 10seconds of bus separation, the combustion manager ini-
tiates a control shutdown.
If there is no bus connection, the combustion manager remains in
standby mode.
4 Only Bus default active, with lockout.
The control circuit (T1/T2) is ignored.
After 10seconds of bus separation, the combustion manager ini-
tiates a lockout.
If there is no Bus connection, the fault appears immediately. The
combustion manager must then be connected to the Master
whilst in lockout.
4. Install GSD file
Only in conjunction with Profibus, skip this step with Modbus.
Install GSD file supplied in programming tool.
5. Configuration
Stipulate configuration of input and output data.
Profibus [ch.7.1]
Modbus [ch.7.2]

Installation and operating instruction
Fieldbus module EM3/2
6 Troubleshooting
83296302 1/2018-01 La 11-32
6 Troubleshooting
In addition to this chapter, the installation and operating manual of the burner
should be observed.
Fault codes Cause Rectification
18h Second detailed fault code:
A1h
Invalid Bus address
Check Bus address
Second detailed fault code:
A5h
Configuration at output B4 incorrect
Check configuration at output B4
Second detailed fault code:
A9h
No Bus connection
Check Bus connection
Second detailed fault code:
EEh
Communication to W-FM 25 failed
–
Second detailed fault code:
EFh
Extension module to W-FM 25 not compatible
Check version
F9 Connection to Fieldbus faulty, reaction according
to parameter200 [ch.5]
Modbus:
no query within one minute
Profibus:
cyclic data flow was interrupted
Check Bus connection

Installation and operating instruction
Fieldbus module EM3/2
7 Technical documentation
83296302 1/2018-01 La 12-32
7 Technical documentation
7.1 Profibus
7.1.1 Profibus output data to Fieldbus module
Five configurations (variables) of the output data can be selected from the GSD file.
Depending on the configuration, the output data is expanded by the corresponding
bytes. That means the B-Transfer is included in the C-Transfer, the C-Transfer is
included in the D-Transfer, etc.
Configuration Byte
A-Transfer –, no Bytes
B-Transfer AB0, AB1
C-Transfer AB0, AB1, AB2
D-Transfer AB0, AB1, AB2, AB3
E-Transfer AB0, AB1, AB2, AB3, AB4
Byte Bit Information Description
A-Transfer
– – no Bytes default –
from B-Transfer
AB0 0 Heat demand If the Bit is set to 1 by the master, a heat demand is
present until the heat demand is deactivated via Bit0 in
AB1.
1 not used –
2 Input Plus In control mode, the burner output can be increased via the
Bit. For each step, the signal must be applied for 500 ms
and removed again.
The step size can be changed in parameter72 via the
VisionBox Software.
In oil operation, the burner changes to or remains in stage
2.
3 Input Minus In control mode, the burner output can be decreased via
the Bit. For each step, the signal must be applied for 500
ms and removed again.
The step size can be changed in parameter72 via the
VisionBox Software.
In oil operation, the burner changes to or remains in stage
1.
4 not used –
5 OutputB4 switches (if para-
meter110 is set to 247)
Output B4 can be switched on and off. Prerequisite is that
parameter110 is configured to 247.
6 Remote reset (if parameter 269
set to 1)
If the Bit is set to 1 by the Master, and only reset to 0 after
0.5s, the combustion manager is reset.
If the Bit is held on 1 for more than 5s, the combustion
manager is not reset.
To be able to utilise Bus remote reset, parameter269 must
be set to 1.
7 not used –

Installation and operating instruction
Fieldbus module EM3/2
7 Technical documentation
83296302 1/2018-01 La 13-32
Byte Bit Information Description
AB1 0 Deactivate heat demand Deactivates heat demand via Bus (Bit 0 in AB0)
1 not used –
2 Modulation default LS-Bit Activates the modulation default:
Bit 2 = 0, Bit 3 = 0: controller (T6/T7/T8)
Bit 2 = 1, Bit 3 = 0: Inputs Plus and Minus in AB0
Bit 2 = 0, Bit 3 = 1: degree of modulation in % in AB2
Bit 2 = 1, Bit 3 = 1: degree of modulation in 0.01 % in
AB2 and AB3
3 Modulation default MS-Bit
4 … 7 not used –
from C-Transfer
AB2 0…7 Degree of modulation default in
%
– or –
degree of modulation default in
0.01%
LowByte
If AB1 Bit 2 = 0 and Bit 3 = 1:
Gas operation:
Degree of modulation default in %
Oil operation:
Degree of modulation default ≤ 25 % = stage 1
Degree of modulation default ≥ 75 % = stage 2
If AB1 Bit 2 = 1 and Bit 3 = 1:
Gas operation:
Degree of modulation default in 0.01 % (10000 equal
to 100 %)
Oil operation:
Degree of modulation default ≤ 25 % (2500) = stage
1
Degree of modulation default ≥ 75 % (7500) = stage
2
AB2 is the LowByte and AB3 the HighByte.
from D-Transfer
AB3 0…7 Degree of modulation default in
0.01%
HighByte
If AB1 Bit 2 = 1 and Bit 3 = 1:
Gas operation:
Degree of modulation default in 0.01 % (10000 equal
to 100 %)
Oil operation:
Degree of modulation default ≤ 25 % (2500) = stage
1
Degree of modulation default ≥ 75 % (7500) = stage
2
AB2 is the LowByte and AB3 the HighByte.
from E-Transfer
AB4 0…7 not used –

Installation and operating instruction
Fieldbus module EM3/2
7 Technical documentation
83296302 1/2018-01 La 14-32
7.1.2 Profibus input data for Bus participants
Four configurations (variables) of the input data can be selected from the GSD file.
Input data is information about the condition of the combustion manager.
Depending on the configuration, the input data is expanded by the corresponding
bytes. That means the Basic-Transfer is included in Standard-Transfer, Standard-
Transfer is included in Extended-Transfer, etc.
Configuration Byte Number of Bytes
Basic-Transfer EB0 … EB2 3 Bytes
Standard-Transfer EB0 … EB5 6 Bytes
Extended-Transfer EB0 … EB33 34 Bytes
Special-Extended-Transfer EB0 … EB57 58 Bytes
Bytes EB0, EB1, EB5 contain Bit information.
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.
Byte Bit Information Description S
Basic-Transfer
EB0 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 gas / valve proving gas pressure switch, oil pressur
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
EB1 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
EB2 0…7 Operating phase or error codes Current operating phase or, if in lockout, error codes X
from Standard-Transfer
EB3 0…7 Flame quality or first detailed er-
ror code
Flame quality or if in lockout first detailed error code X
EB4 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
EB5 0 Internal fuel change-over Input fuel change-over was activated 0
1…7 not used – 0

Installation and operating instruction
Fieldbus module EM3/2
7 Technical documentation
83296302 1/2018-01 La 15-32
Byte Bit Information Description S
from Extended-Transfer
EB6 0…7 Setpoint degree of modulation LowByte 16-Bit setpoint degree of modulation X
EB7 0…7 HighByte 16-Bit setpoint degree of modulation X
EB8 0…7 Setpoint position of air actuator LowByte 16-Bit setpoint position of air actuator X
EB9 0…7 Highbyte 16-Bit setpoint position of air actuator X
EB10 0…7 Setpoint position of gas actu-
ator
Lowbyte 16-Bit setpoint position of gas actuator X
EB11 0…7 Highbyte 16-Bit setpoint position of gas actuator X
EB12 0…7 Fan setpoint speed in % Lowbyte 16-Bit fan setpoint speed X
EB13 0…7 Highbyte 16-Bit fan setpoint speed X
EB14 0…7 Actual fan speed in rpm Lowbyte 16-Bit actual fan speed 0
EB15 0…7 Highbyte 16-Bit actual fan speed 0
EB16 0…7 Start-up counter oil and gas
(fixed)
Byte 0 (Lowbyte) 32-Bit start-up counter X
EB17 0…7 Byte 1 X
EB18 0…7 Byte 2 X
EB19 0…7 Byte 3 (Highbyte) 32-Bit start-up counter X
EB20 0…7 Operating hours counter Gas in
seconds (fixed)
Byte 0 (Lowbyte) 32-Bit operating hours counter X
EB21 0…7 Byte 1 X
EB22 0…7 Byte 2 X
EB23 0…7 Byte 3 (Highbyte) 32-Bit operating hours counter X
EB24 0…7 Operating hours counter oil
stage 1 in seconds (fixed)
Byte 0 (Lowbyte) 32-Bit operating hours counter X
EB25 0…7 Byte 1 X
EB26 0…7 Byte 2 X
EB27 0…7 Byte 3 (Highbyte) 32-Bit operating hours counter X
EB28 0…7 Operating hours counter oil
stage 2 in seconds (fixed)
Byte 0 (Lowbyte) 32-Bit operating hours counter X
EB29 0…7 Byte 1 X
EB30 0…7 Byte 2 X
EB31 0…7 Byte 3 (Highbyte) 32-Bit operating hours counter X
EB32 0…7 not used – 0
EB33 0…7 not used – 0
from Special-Extended-Transfer
EB34 0…7 Actual degree of modulation Lowbyte 16-Bit actual degree of modulation X
EB35 0…7 Highbyte 16-Bit actual degree of modulation X
EB36 0…7 Actual position of air actuator Lowbyte 16-Bit actual position of air actuator 0
EB37 0…7 Highbyte 16-Bit actual position of air actuator 0
EB38 0…7 Actual position of Gas actuator Lowbyte 16-Bit actual position of gas actuator 0
EB39 0…7 Highbyte 16-Bit actual position of gas actuator 0
EB40 0…7 Start-up counter oil and gas
(can be reset)
Byte 0 (Lowbyte) 32-Bit start-up counter X
EB41 0…7 Byte 1 X
EB42 0…7 Byte 2 X
EB43 0…7 Byte 3 (Highbyte) 32-Bit start-up counter X
EB44 0…7 Operating hours counter oil and
gas in seconds (can be reset)
Byte 0 (Lowbyte) 32-Bit operating hours counter X
EB45 0…7 Byte 1 X
EB46 0…7 Byte 2 X
EB47 0…7 Byte 3 (Highbyte) 32-Bit operating hours counter X

Installation and operating instruction
Fieldbus module EM3/2
7 Technical documentation
83296302 1/2018-01 La 16-32
Byte Bit Information Description S
EB48 0…7 Lifetime counter in seconds Byte 0 (Lowbyte) 32-Bit time counter X
EB49 0…7 Byte 1 X
EB50 0…7 Byte 2 X
EB51 0…7 Byte 3 (Highbyte) 32-Bit time counter X
EB52 0…7 Fuel quantity meter Byte 0 (Lowbyte) 32-Bit quantity meter X
EB53 0…7 Byte 1 X
EB54 0…7 Byte 2 X
EB55 0…7 Byte 3 (Highbyte) 32-Bit quantity meter X
EB56 0…7 not used – 0
EB57 0…7 not used – 0

Installation and operating instruction
Fieldbus module EM3/2
7 Technical documentation
83296302 1/2018-01 La 17-32
7.1.3 Profibus interface specification
Manufacturer ID ID number 0x0EE6
ASCIC–Type VPC3+C
Sync-Mode
Freeze-Mode
Is supported.
Sync command: Freeze all outputs of addressed Slaves.
Freeze command: Freeze all inputs of addressed Slaves.
Cycle time Maximum response time to a request telegram depending on the Bus transmission rate.
9.6 … 500 kBit/s: 15 Bit times
1500 kBit/s: 20 Bit times
3000 kBit/s: 35 Bit times
6000 kBit/s: 50 Bit times
12000 kBit/s: 95 Bit times
Diagnostic The Profibus module generates an external diagnostic if it detects an internal fault. The dia-
gnostic from the DP Slave contains standard diagnostic information (6 Bytes).
Octet 1:
Bit 0 = Diag.station does not exist (set by Master)
Bit 1: Diag.station not_ready: Slave is not available for data exchange
Bit 2: Diag.cfg_Fault: Conflicting configuration data
Bit 3: Diag.ext_diag: Slave has external diagnostic data
Bit 4: Diag.not supported: Requested function is not supported in the Slave
Bit 5: Diag.invalid_slave_response (set to 0 by Slave)
Bit 6: Diag.prm_fault: Incorrect parameter settings (ID number, etc.)
Bit 7: Diag.master_lock, Slave is configured by another Master (set by master)
Octet 2:
Bit 0: Diag.Prm_req: Slave must be reconfigured
Bit 1: Diag.Stat_diag: Static diagnostic (Byte Diag–Bits)
Bit 2: fixed to 1
Bit 3: Diag.WD_ON: Response monitoring activated
Bit 4: Diag.freeze_mode: Freeze command received
Bit 5: Sync_mode: Sync command received
Bit 6: reserved
Bit 7: Diag.deactivated (set by master))
Octet 3:
Bit 0 … 6: reserved
Bit 7: Diag.ext_overflow
Octet 4:
Diag master_add, master address following configuration (FF without configuration)
Octet 5:
ID number Highbyte
Octet 6:
ID number Lowbyte
Parameters Only cyclic communication supported
Automatic Baud rate
recognition
Is supported.

Installation and operating instruction
Fieldbus module EM3/2
7 Technical documentation
83296302 1/2018-01 La 18-32
7.2 Modbus
7.2.1 Modbus output data to Fieldbus module
Register addresses have been created in the Fieldbus module, to which the Mod-
bus can write in order to send commands to the combustion manager. A register
address always contains 16Bit. These addresses can also be read with the corres-
ponding Function-Codes [ch.7.2.2].
The defaults can be written with the following Function-Codes:
05 (0x05) Write Single Coil (Coil: Bit to Bit address x),
06 (0x06) Write Single Register (to register address)
16 (0x10) Write Multiple Registers (from register address)
Index Bit Information Description
110 0 Heat demand If the Bit is set to 1 by the master, a heat demand is
present, until the heat demand is deactivated via Bit8 in
Register110.
1 not used –
2 Input Plus In control mode, the burner output can be increased via the
Bit. For each step, the signal must be applied for 500 ms
and removed again.
The step size can be changed in parameter72 via the
VisionBox Software.
In oil operation, the burner changes to or remains in stage
2.
3 Input Minus In control mode, the burner output can be decreased via
the Bit. For each step, the signal must be applied for 500
ms and removed again.
The step size can be changed in parameter72 via the
VisionBox Software.
In oil operation, the burner changes to or remains in stage
1.
4 not used –
5 OutputB4 switches (if para-
meter110 is set to 247)
Output B4 can be switched on and off. Prerequisite is that
parameter110 is configured to 24.
6 Remote reset (if parameter 269
set to 1)
If the Bit is set to 1 by the Master, and only reset to 0 after
0.5s, the combustion manager is reset.
If the Bit is held on 1 for more than 5s, the combustion
manager is not reset.
To be able to utilise Bus remote reset, parameter269 must
be set to 1.
7 not used –
8 Deactivate heat demand Deactivates heat demand via Bus (Bit 0 in Register 110).
9 not used –
10 Modulation default LS-Bit Activates the modulation default:
Bit 10 = 0, Bit 11 = 0: controller (T6/T7/T8)
Bit 10 = 1, Bit 11 = 0: Inputs Plus/Minus in Re-
gister110
Bit 10 = 0, Bit 11 = 1: degree of modulation in % in Re-
gister111
Bit 10 = 1, Bit 11 = 1: degree of modulation in 0.01 %
in Register111
11 Modulation default MS-Bit
12 … 15 not used –

Installation and operating instruction
Fieldbus module EM3/2
7 Technical documentation
83296302 1/2018-01 La 19-32
Index Bit Information Description
111 0 … 15 Degree of modulation default in
%
– or –
Degree of modulation default in
0.01%
Lowbyte depending on config-
uration of Bits 10 and 11 in Re-
gister 110
If register110 Bit 10 = 0 and Bit 11 = 1:
Gas operation:
Degree of modulation default in %
Oil operation:
Degree of modulation default ≤ 25 % = stage 1
Degree of modulation default ≥ 75 % = stage 2
If register110 Bit 10 = 1 and Bit 11 = 1:
Gas operation:
Degree of modulation default in 0.01 % (10000 equal
to 100 %)
Oil operation:
Degree of modulation default ≤ 25 % (2500) = stage
1
Degree of modulation default ≥ 75 % (7500) = stage
2
112 0 … 15 not used –

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